Physiological stress indicates the environmental pressures which affect the
plant physiology and change it. The experiment was conducted as split plot in
randomized complete block design with three replications on safflower (Carthamus
tinctorius) from 2015 to 2016. Treatments were: 1) Irrigation: without stress (irrigation
after 70 mm evaporation from evaporation pan class A) and drought stress (irrigation
after 150 mm evaporation from pan class A) was considered as the main factor and
the concentration of salicylic acid with three levels (0.100 and 200 mg L-1) as the first
sub-factor. The second sub-factor includes the concentrations of three levels of
potassium sulphate (0.05 and 1 mg L-1). The interaction between drought stress and
potassium sulphate and also potassium sulphate and salicylic acid were significant on
the induction of plant height. With regard to this, the comparison between salicylic
acid and potassium sulphate interaction on the safflower plant height and the highest
plant height (107.3 cm) was obtained by using 200 mg salicylic acid plus 1 mg L-1 of
potassium sulphate. The combined analysis of data indicated that interaction between
potassium sulphate × salicylic acid on the grain yield was significant. The highest grain
yield (1550 kg ha-1) belonged to the foliar application of 100 mg salicylic acid and 0.5
mg L-1 of potassium sulphate interaction. The interaction of salicylic acid and
potassium sulphate was significant on the biological yield, and the highest biological
yield was obtained with 200 mg L-1 of salicylic acid and 0.5 mg L-1 of potassium
sulphate. Therefore, in order to compensate for some of the harmful effects of stress
and enable the plant to return to normal growing conditions after re-watering, foliar
application of such chemical compounds on plant can be effective and plays an
important role on the resistance of plant to drought.
Productivity of some forage grasses under foliar sprinkler irrigation and fol...Innspub Net
Field experiment was conducted during 2013/2014 and 2015 seasons was aimed to evaluate productivity of Rhodes and Blue panic grasses as well as Alfalfa under sprinkler irrigation with foliar application of potassium nitrate that enable plants to cope with water stress. Each two forage grasses beside alfalfa were conducted in separate experiments. Irrigation every 10 days surpassed in total chlorophyll, leaf area, plant height, number of stems/m 2 , forage green yield/fed and forage dry matter yield/fed than those irrigated every 20 days. Highest percentages of water use efficiency, crude fiber and nitrogen free extract as well as yield/fed of crude protein, crude fiber, ether extract, ash and nitrogen free extract were produced from irrigation every 7 days. However, highest percentages of crude protein, ether extract and ash were produced from irrigation every 14 days. Forage species significantly differed on total chlorophyll, leaf area/plant, plant height, average of number of stem/cm 2 , forage green yield/fed and forage dry matter yield/fed. A significant effect due to forage species on percentages of water use efficiency, crude protein and fiber, extracting ether, ash and nitrogen free extract and nitrogen free extract as well as crude fiber, extracting ether, ash and nitrogen free extract yield/fed. Sown Rhodes grass produced maximum forage green and forage dry matter yield/fed and its quality compared with other studied forage crops. Foliar spraying of potassium nitrate at 15 ppm significantly increased total chlorophyll, leaf area, plant height, number of stems/m 2 , forage green and forage dry matter yield/fed. The results showed that highest percentages of water use efficiency, crude protein, crude fiber and ether extract, and nitrogen free extract and nitrogen free extract as well as crude fiber, extracting ether, ash and nitrogen free extract yield/fed. It could be stated that irrigation every 10 days and sown Rhodes grass and foliar spraying of potassium nitrate at 15 ppm maximized forage green and forage dry matter yield/fed. Get the full articles at: http://www.innspub.net/ijaar/productivity-of-some-forage-grasses-under-foliar-sprinkler-irrigation-and-foliar-application-of-potassium-nitrate-under-salinity-stress/
Rice is one of the most important cereal crops of developing countries and
the staple food of about 65% of the world’s population. The rice crops have been
greatly disturbed by the heavy metals. The present study deals with the toxic effect of
sodium arsenate on morphological and molecular variation through SDS
-
PAGE in 10
rice (
Oryza sativa
L.) varieties. Ten varieties of rice were grown under different
concentration (25 ppm, 50 ppm and 100 ppm) of sodium arsenate against control.
Morphological parameters like shoot length, root length, leaf area and biomass
showed marked differences among ten rice varieties. The proteins were separated
through SDS
-
PAGE gel electrophoresis and calculated their molecular weight. The
morphological and molecular variations induced in rice varieties by arsenic stress
provide a new insight leading to a better understanding of the heavy metal response
in plants.
Rice is one of the most important cereal crops of developing countries and the staple food of about 65% of the world’s population. The rice crops have been greatly disturbed by the heavy metals. The present study deals with the toxic effect of sodium arsenate on morphological and molecular variation through SDS-PAGE in 10 rice (Oryza sativa L.) varieties. Ten varieties of rice were grown under different concentration (25 ppm, 50 ppm and 100 ppm) of sodium arsenate against control. Morphological parameters like shoot length, root length, leaf area and biomass showed marked differences among ten rice varieties. The proteins were separated through SDS-PAGE gel electrophoresis and calculated their molecular weight. The morphological and molecular variations induced in rice varieties by arsenic stress provide a new insight leading to a better understanding of the heavy metal response in plants.
Article Citation:
John De Britto R, Mary Sujin R, Steena Roshan Sebastian and Dharmar K.
Toxic effect of arsenic on ten rice varieties.
Journal of Research in Agriculture (2011) 1(1): 011-016.
Full Text:
http://www.jagri.info/documents/AG0003.pdf
Effects of different irrigation and fertilization treatments on growth and yi...Premier Publishers
The experiment was implemented during the autumn season 2013, to study the effect of three methods of irrigation and fertilization on the development and yield of the potato (Solanum tuberosum L.) cv Rivera. Two methods of drip irrigation (putting the pipe at the bottom and at the top of furrows) and furrow irrigation with three types of fertilizers (chemical fertilizer at rate of 300 kg urea, 180 kg superphosphate triple, 240 kg potassium sulphate per hectare) and organic fertilizer at 30 kg.100 m2 -1 with half amount of the chemical fertilizers mentioned. The organic fertilizers were added in two ways: by scattering dry fertilizer and irrigation with fertilizer solution near plant roots. Results showed that the highest total water content of leaves was 86.665%, leaf area 2285 cm2, roots dry weight 13.60 g., average tuber weight 69.56 g., and the percentage of dry matter in tubers 19.26% was produced from applying organic fertilizer by irrigation, whereas the highest total tubers yield was 16.345 tons.ha-1 and water use efficiency 9.855 kg. ha-1 resulted from organic fertilizer by scattering method, also the treatment of drip irrigation by putting the pipe at the top of the furrows was superior in all studied parameters except the average tuber weight and total soluble solids compared with the other two treatments.
To evaluate the effect of humic acid fertilizer on potato tubers in 2010, trials were conducted in the Province of Iran. The experiment was conducted on a split plot with randomized complete block design having three replications. Main plots consisted of four levels of humic acid (0, 1, 2, 3 times) solution in water irrigation and sub-factor consisted of three varieties of potato (Marfona, Satina, and Born). During planting the application of humic acid at the rate of nine liters per hectare per load at the beginning and start of creating tuber formation respectively were done. Analysis of variance showed that the smallest and largest tuber weight, number of tubers per plant and yield per plant were not significant. Effect of humic acid on the smallest mean tumor weight at 1% and the number of tubers and yield per plant showed significant difference at 5% level. The largest tuber weight was also not significantly different. Interaction of humic acid fertilizer in any of the measured parameters showed no significant difference in potatoes. Comparison by Duncan test showed that the application of humic acid in all the three stages of growth had shown great impact on tuber weight. The highest number of tubers per plant has been associated with the use of humic acid (27 l/ha). The number of tubers per hectare with the application of 18 litres of humic acid showed no significant difference. The amount of humic acid applied were 18 and 27 litres per hectare, and increased performance is in the range of 13 and 29% respectively.
ABSTRACT- The effects of water deficit induced by withholding water in soil pots were examined on the activities of various key enzymes i.e. nitrate reductase, peroxidase, acid phosphatase, α-amylase and invertase in Commiphora wightii. Drought stress induced decrease in the activities of nitrate reductase, peroxidase, α-amylase and invertase was observed in leaves of C. wightii. The decreased activity of peroxidase enzyme in C. wightii plants under water stress condition indicates that the plant is capable of maintaining growth vigour despite adverse conditions. On the other hand, acid phosphatase activity increased continuously in the leaves of C. wightii plants subjected to water stress. The results clearly indicate that regulation of enzymatic activity under drought is an essential biochemical process, which prevents the plants from drought-induced damage.
Key-words- Drought, Commiphora wightii, Nitrate reductase, Peroxidase, Acid phosphatase, α-amylase, Invertase
Productivity of some forage grasses under foliar sprinkler irrigation and fol...Innspub Net
Field experiment was conducted during 2013/2014 and 2015 seasons was aimed to evaluate productivity of Rhodes and Blue panic grasses as well as Alfalfa under sprinkler irrigation with foliar application of potassium nitrate that enable plants to cope with water stress. Each two forage grasses beside alfalfa were conducted in separate experiments. Irrigation every 10 days surpassed in total chlorophyll, leaf area, plant height, number of stems/m 2 , forage green yield/fed and forage dry matter yield/fed than those irrigated every 20 days. Highest percentages of water use efficiency, crude fiber and nitrogen free extract as well as yield/fed of crude protein, crude fiber, ether extract, ash and nitrogen free extract were produced from irrigation every 7 days. However, highest percentages of crude protein, ether extract and ash were produced from irrigation every 14 days. Forage species significantly differed on total chlorophyll, leaf area/plant, plant height, average of number of stem/cm 2 , forage green yield/fed and forage dry matter yield/fed. A significant effect due to forage species on percentages of water use efficiency, crude protein and fiber, extracting ether, ash and nitrogen free extract and nitrogen free extract as well as crude fiber, extracting ether, ash and nitrogen free extract yield/fed. Sown Rhodes grass produced maximum forage green and forage dry matter yield/fed and its quality compared with other studied forage crops. Foliar spraying of potassium nitrate at 15 ppm significantly increased total chlorophyll, leaf area, plant height, number of stems/m 2 , forage green and forage dry matter yield/fed. The results showed that highest percentages of water use efficiency, crude protein, crude fiber and ether extract, and nitrogen free extract and nitrogen free extract as well as crude fiber, extracting ether, ash and nitrogen free extract yield/fed. It could be stated that irrigation every 10 days and sown Rhodes grass and foliar spraying of potassium nitrate at 15 ppm maximized forage green and forage dry matter yield/fed. Get the full articles at: http://www.innspub.net/ijaar/productivity-of-some-forage-grasses-under-foliar-sprinkler-irrigation-and-foliar-application-of-potassium-nitrate-under-salinity-stress/
Rice is one of the most important cereal crops of developing countries and
the staple food of about 65% of the world’s population. The rice crops have been
greatly disturbed by the heavy metals. The present study deals with the toxic effect of
sodium arsenate on morphological and molecular variation through SDS
-
PAGE in 10
rice (
Oryza sativa
L.) varieties. Ten varieties of rice were grown under different
concentration (25 ppm, 50 ppm and 100 ppm) of sodium arsenate against control.
Morphological parameters like shoot length, root length, leaf area and biomass
showed marked differences among ten rice varieties. The proteins were separated
through SDS
-
PAGE gel electrophoresis and calculated their molecular weight. The
morphological and molecular variations induced in rice varieties by arsenic stress
provide a new insight leading to a better understanding of the heavy metal response
in plants.
Rice is one of the most important cereal crops of developing countries and the staple food of about 65% of the world’s population. The rice crops have been greatly disturbed by the heavy metals. The present study deals with the toxic effect of sodium arsenate on morphological and molecular variation through SDS-PAGE in 10 rice (Oryza sativa L.) varieties. Ten varieties of rice were grown under different concentration (25 ppm, 50 ppm and 100 ppm) of sodium arsenate against control. Morphological parameters like shoot length, root length, leaf area and biomass showed marked differences among ten rice varieties. The proteins were separated through SDS-PAGE gel electrophoresis and calculated their molecular weight. The morphological and molecular variations induced in rice varieties by arsenic stress provide a new insight leading to a better understanding of the heavy metal response in plants.
Article Citation:
John De Britto R, Mary Sujin R, Steena Roshan Sebastian and Dharmar K.
Toxic effect of arsenic on ten rice varieties.
Journal of Research in Agriculture (2011) 1(1): 011-016.
Full Text:
http://www.jagri.info/documents/AG0003.pdf
Effects of different irrigation and fertilization treatments on growth and yi...Premier Publishers
The experiment was implemented during the autumn season 2013, to study the effect of three methods of irrigation and fertilization on the development and yield of the potato (Solanum tuberosum L.) cv Rivera. Two methods of drip irrigation (putting the pipe at the bottom and at the top of furrows) and furrow irrigation with three types of fertilizers (chemical fertilizer at rate of 300 kg urea, 180 kg superphosphate triple, 240 kg potassium sulphate per hectare) and organic fertilizer at 30 kg.100 m2 -1 with half amount of the chemical fertilizers mentioned. The organic fertilizers were added in two ways: by scattering dry fertilizer and irrigation with fertilizer solution near plant roots. Results showed that the highest total water content of leaves was 86.665%, leaf area 2285 cm2, roots dry weight 13.60 g., average tuber weight 69.56 g., and the percentage of dry matter in tubers 19.26% was produced from applying organic fertilizer by irrigation, whereas the highest total tubers yield was 16.345 tons.ha-1 and water use efficiency 9.855 kg. ha-1 resulted from organic fertilizer by scattering method, also the treatment of drip irrigation by putting the pipe at the top of the furrows was superior in all studied parameters except the average tuber weight and total soluble solids compared with the other two treatments.
To evaluate the effect of humic acid fertilizer on potato tubers in 2010, trials were conducted in the Province of Iran. The experiment was conducted on a split plot with randomized complete block design having three replications. Main plots consisted of four levels of humic acid (0, 1, 2, 3 times) solution in water irrigation and sub-factor consisted of three varieties of potato (Marfona, Satina, and Born). During planting the application of humic acid at the rate of nine liters per hectare per load at the beginning and start of creating tuber formation respectively were done. Analysis of variance showed that the smallest and largest tuber weight, number of tubers per plant and yield per plant were not significant. Effect of humic acid on the smallest mean tumor weight at 1% and the number of tubers and yield per plant showed significant difference at 5% level. The largest tuber weight was also not significantly different. Interaction of humic acid fertilizer in any of the measured parameters showed no significant difference in potatoes. Comparison by Duncan test showed that the application of humic acid in all the three stages of growth had shown great impact on tuber weight. The highest number of tubers per plant has been associated with the use of humic acid (27 l/ha). The number of tubers per hectare with the application of 18 litres of humic acid showed no significant difference. The amount of humic acid applied were 18 and 27 litres per hectare, and increased performance is in the range of 13 and 29% respectively.
ABSTRACT- The effects of water deficit induced by withholding water in soil pots were examined on the activities of various key enzymes i.e. nitrate reductase, peroxidase, acid phosphatase, α-amylase and invertase in Commiphora wightii. Drought stress induced decrease in the activities of nitrate reductase, peroxidase, α-amylase and invertase was observed in leaves of C. wightii. The decreased activity of peroxidase enzyme in C. wightii plants under water stress condition indicates that the plant is capable of maintaining growth vigour despite adverse conditions. On the other hand, acid phosphatase activity increased continuously in the leaves of C. wightii plants subjected to water stress. The results clearly indicate that regulation of enzymatic activity under drought is an essential biochemical process, which prevents the plants from drought-induced damage.
Key-words- Drought, Commiphora wightii, Nitrate reductase, Peroxidase, Acid phosphatase, α-amylase, Invertase
The present study investigates the growth and developmental changes of Pearlmillet [(Pennisetum glaucum (L.) R.Br.)] and Ragi [Eleusine coracana (Gaertn )] under pot culture experiments with different concentrations of aqueous leaf extracts (5, 10, 20, 30 and 50g/l) of Teak. Teak leaf extracts showed an inhibitory and stimulatory effects on germination, seedling length, biomass, pigments and biochemical constituents of pearl millet and ragi. The 5g/l concentration of extract stimulated the seed germination, seedling growth and biochemical constituents of pearl millet and ragi.. The higher concentrations (10, 20, 30and 50g/l) showed an inhibitory effects in all the parameters studied in the two economically important cereals. The degree of retardation was dependent on the concentration of the Teak leaf extracts. Root length, Shoot length, Biomass and Biochemical constituents of ragi seedlings were highly reduced at 50g/l concentrations of aqueous leaf
extracts of Teak. Between pearl millet and ragi seedlings, more allelopathic influence was observed in ragi than pearl millet seedlings.
Morphological and physiological attributes associated to drought tolerance of...Innspub Net
The experiment was conducted to assess the differential morpho-physiological response to stimulated water deficit and to determine the relationship between some of these morphological and physiological traits and yield components of eighteen durum wheat genotypes grown in pots under lathhouse condition. Water deficit significantly affected gas exchange and chlorophyll fluorescence parameters. It reduced the net photosynthesis rate (Pn), transpiration rate (E) and stomatal conductance (gs) measured both at anthesis and grain-filling stages. Similarly, the value of initial fluorescence (Fo) was increased while variable fluorescence (Fv), maximum fluorescence (Fm) and optimum quantum yield fluorescence (Fv/Fm) were decreased under water deficit. RWC of the leaves was decreased by 36.7% while SLA increased by 12.6% due to moisture stress relative to the well-watered control. No significant correlations were found between chlorophyll fluorescence parameters and grain yield under water deficit condition. Similarly, no significant correlations were found between leaf gas exchange parameters and grain yield. On the other hand, peduncle length and excursion were positively correlated with grain yield while negatively correlated with drought susceptibility index under water deficit condition. Leaf posture and rolling had also a profound effect on grain yield and other attributes. Erect-leaved genotypes had more grain yield, HI, kernel numbers per spikelet and grain-filling rate but had lower kernel weight than droopy leaved. Similarly, genotypes exhibited strong leaf rolling under water deficit condition had more grain yield, kernel numbers per spike and water use efficiency. The genetic variability found for leaf posture, leaf rolling, peduncle length and excursion among the Ethiopian durum wheat genotypes suggests the opportunity for selection superior and adapted genotype in water-limited environments. These can be achieved by integrating these morphological traits as indirect selection in conjunction with other yield components. Get the full articles at: http://www.innspub.net/volume-1-number-2-april-2011-2/
There is a great contamination of water, soil, air, soil erosion, pest resistance
and extensive use of chemical fertilizers cause a turn to induce agriculture for
producing safe and clean products. For this purpose, by using natural materials like
algae on the beach, organic and environmentally friendly fertilizer was prepared. In
this investigation effect of Seaweed Liquid Fertilizer (SLF) of Ulva fasciata at
concentrations of 0%, 2.5%, 5%, 7.5% and 10% on some parameters of wheat
(Triticum aestivum var. chamran) has been investigated. Based on the results, above
algae can be used as a food supplement solution in the form of foliar spray at 2.5%
concentration with a significant increase in morphological and biochemical indices.
Evaluation of air pollution tolerant tree species for Kothagiri Municipal Town, the Nilgiris, Tamil Nadu.
Senthilkumar P and Paulsamy S.
Journal of research in Biology (2011) 2: 148-152
Abstract:
Air pollution tolerance index (APTI) has been determined by pooling the at-tributes viz., total chlorophyll, ascorbic acid and moisture content of leaves and leaf extract pH for certain locally available tree species in and around Kothagiri Municipal Town, the Nilgiris. Of the 24 species analyzed 6 tree species such as Alnus nepalensis, Callistemon lanceolata, Eucalyptus ficifolia, Ficus elastica, Michelia champaca and Toona ciliate recorded higher APTI values. Hence, it is suggested that these tree spe-cies can be given priority for plantation programme in and around industrial com-plexes, road sides and also new urbanized areas in Kotagiri so as to reduce the effect of air pollution and makes the environment clean.
Drip Fertigation in Sweet Pepper: A ReviewIJERA Editor
Sweet Pepper is one of the most important vegetable crops grown in India. Water has been identified as one of the scarcest inputs, which can severely restrict its growth unless it is carefully conserved and managed. Adoption of modern irrigation technique like drip irrigations is needed to be emphasized to increase water use efficiency and covering more area under irrigation. Drip fertigation is the most effective way to supply water and nutrients to the plants which not only saves water but also increases yield of fruits and vegetable crops. As reported by different research workers of the world, adoption of drip fertigation in sweet pepper results in saving of fertilizer up to 25 per cent, water saving up to 40 percent significant increase in yield, significant increase in water use efficiency and better quality produce.
Physiological and biochemical response of common bean genotypes (Phaseolus vu...Premier Publishers
A field experiment was established over three rainy seasons (2011, 2012 and 2013) at two locations (Shaban and Al-Qaidah) which represented the severe (SDS) and moderate (MDS) drought stress in the southern highlands of Yemen-Ibb. The experiment was arranged in a split plot design with three replication. The main plots were: untreated or treated seeds with 0.5 mM salicylic acid (SA), the subplot were nine CIAT bean lines and three local cultivars. The results revealed that salicylic acid improved significantly the yield and yield traits of some genotypes. Accordingly, under severe drought stress, the bean genotypes categorized into three groups; The first group (MIB-156, MIB-156, G23818B and NSL) which were high yielding and low responsiveness genotypes to SA group (HY-LSAR); The second group (BFB-139, BFB-140 and BFB-141) that perform low yielding and high responsiveness genotypes to SA (LY-HSAR) and the third group (Taiz-304, Taiz-5 and Taiz-306) that perform low yielding and low responsiveness genotypes to SA group (LY-LSAR). It is concluded that the physiological mechanism of bean cultivars response of the high tolerant lines (LY-HSAR) and the medium tolerant lines to drought (LY-HSAR) to SA was similar by causing significant increase in dry matter accumulation, photosynthetic pigments content of leaves and accumulation of high proline content, total soluble sugars, total free amino acids, and soluble proteins, and also by maintain high relative water content (RWC%) and low leaf ion leakage (LIL%) in comparison to susceptible cultivars to drought (LY-LSAR).
Methylene blue is widely used in various industrial branches. Due to insufficient treatment, its occurrence in wastewater is frequently detected, which may result in serious environment problems to aquatic organisms. Hydroponic experiments were conducted with rice seedlings (Oryza sativa L. cv. XZX 45) exposed to methylene blue to determine the effective concentration using relative growth rate and water use efficiency as response endpoints. Results showed that acute toxicity of methylene blue to rice seedlings was evident. Although a linear decrease in relative growth rate and water use efficiency was observed in rice seedlings with increasing methylene blue concentrations, relative growth rate of rice seedlings was more sensitive to change of methylene blue than water use efficiency. Using non-linear regression, EC-48 h values for 10%, 20% and 50% inhibition of the relative growth rate were estimated to be 1.54, 3.22 and 10.13 mg MB/L for rice seedlings exposed to methylene blue, respectively, while smaller EC were obtained for 96 h exposure. In conclusion, the toxic response of young rice seedlings to methylene blue is obvious and inhibitory effects are highly dependent on response endpoints and the duration of exposure period.
Exogenous application with plant growth promoting rhizobacteria (PGPR) or pro...Agriculture Journal IJOEAR
Abstract— A pot experiment was conducted to investigate the effects of plant growth promoting rhizobacteria (PGPR) like Azotobacter chrocoocum A101, Pseudomonas fluorescens, pseudomonas mendocina Palleroni 1970 and Azospirillum lipoferum N040 or proline on growth traits, photosynthetic pigments, relative water content (RWC), electrolyte leakage percent (EL%), osmoprotectants such as proline and soluble sugars, activities of antioxidant enzymes like peroxidase (POD), polyphenol oxidase (PPO) and catalase (CAT), oil percent and water use efficiency (WUE) of basil plants subjected to water stress. Plants were treated with two regimes of irrigation water, i.e., 100% of evapotranspiration (ETc) (control) and 60% of ETc and PGPR or proline. Growth traits, photosynthetic pigments, RWC, EL %, proline and soluble sugars concentrations, activities of antioxidant enzymes oil percent and water use efficiency (WUE) were significantly altered by water stress and PGPR or proline treatments. Results indicated that PGPR or proline mitigated the water stress and significantly reduced the reduction in growth traits and leaf water content as compared to non-PGPR or proline-treated water-stressed plants. Water-stressed plants treated with PGPR or proline had significant higher photosynthetic pigments, proline and soluble sugars concentrations than water-stressed plants without PGPR or proline treatments. Higher POD, PPO and CAT activities were also observed in water-stressed plants treated by PGPR or proline than water-stressed plants without PGPR or proline treatments. Furthermore, water-stressed plants treated with PGPR or proline treatments had also significant higher oil percent and WUE as compared to water-stressed plants without PGPR or proline treatments. These results are important as the potential of PGPR or proline to alleviate the harmful effects of water stress and offers an opportunity to increase the resistance of basil plants to growth under drought conditions. The protective action of PGPR was more efficient than proline.
Effects of salinity stress on growth, Water use efficiency and biomass partit...Innspub Net
Future crop production is predicted to face significant challenges from salinity stress due to secondary salinization. Therefore future-proofing crop production in these conditions is an essential path towards addressing food security. We evaluated the effect of irrigation with water of 0, 4 and 8 ppt salinity on growth, biomass partitioning, WUE and chlorophyll fluorescence of Vernonia hymenolepis A.Rich as ameliorated by fertilization with three levels of NPK20:10:10. Data were analysed for variance using the General Linear Model ANOVA procedure, after positive tests for normality and homogeneity of variance. Means were separated through the Dunnett test. Pearson Correlation was done to determine relationship between variables and these were spatially projected using the Factor Analysis procedure, without rotation. Under fertilization at 8 g NPK20:10:10 per plant, growth was stimulated by salinity increase to 4 ppt (35.43cm) compared to 30.43cm for control plants. Fertilizer application significantly improved all the biomass fractions of plants irrigated with water of 4 ppt relative to the control, while root:shoot ratios were highest for unfertilized plants indicating resource re-allocation to roots for better foraging. Chlorophyll fluorescence ranged between 0.716 and 0.727 and did not differ significantly across treatments. These values indicate that all treatments were under stress, including control plants. Values of WUE and RGR indicate that fertilization of plants irrigated with water of 4ppt salinity enhances growth and Harvest Index of V. hymenolepis, in spite of the registered stress. This is significant to future food security.
Influence of vermicomposted soil amendments on plant growth and dry matter pa...Premier Publishers
The present experiment was undertaken to evaluate the effects of different vermicompost substitutions for vlei soil in seedling nursery production. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. Cucumber (Cucumis sativus) seeds were planted in five treatment groups including without vermicompost, 25% vermicompost, 50% vermicompost, 75% vermicompost and 100% vermicompost. Vlei soils were incorporated into the experiment making up the different supplements. There was significant (P<0.05) influence of vermicompost amendments. Tallest seedlings were recorded from V50%(13.2cm) and V75%(12.6cm) and means from treatments V25%, V50% and V75% were significantly higher than treatment V0%. Treatment V100% recorded the highest number of leaves(5.88). Highest root fresh weight was recorded from V50%(2.16g). All treatments revealed a significant difference amongst the treatments with V50% having the highest shoot dry weight of 2.22g. The means for treatments V50% and V75% were significantly higher than the treatment V0%. The highest fresh weight (11.31g) was recorded from V50%. All means for plant dry weight with vermicompost amendments were significantly higher than no vermicompost treatment (V0%). A ratio of 1:1 vermicompost and vlei gave the best results. These finding indicate that instead of using vermicompost alone, its use in mixtures with vlei gives the same effect.
— The present study was conducted to evaluate the plant growth, physiological and biochemical changes of neem under different salinity levels (4, 8, 10 and 12 dS/m) which have multipurpose use in agroforestry. Growth parameters, photosynthetic pigments, carbohydrate, proline and total phenol were investigated 30, 60, 90 and 120 days after treatment imposition. The results revealed that salinity caused significant differences in all the growth parameters and the maximum reduction were observed when plants were exposed to high salinity (12 dS/m) level and minimum were in control treatments. It was found that total dry matter and relative water content were reduced 72% and 40% in 12 dS/m compared to control plants at 120 DATI, respectively. By increasing saliniy 0 to 12 dS/m, the chlorophyll (the photosynthetic pigment) and carbohydrate (the photosynthetic product) content decreased, but increased the level of proline (an amino acid) and total phenol content (an antioxidant) in different days. The highest accumulation of free proline and total phenol content was recorded in 10 dS/m treatment and it was 77% and 59% greater than control plant, respectively. These findings suggest that though growth and biochemical parameters of neem were affected by salt stress, but all the plants survived in different salinity levels. Among all different salinity levels, neem can performed better up to 10 dS/m salinity level could be due to better antioxidant system of neem to cope up with oxidative damage to stressed plants.
Effectiveness of various salinity on leaf growth of Gazania | IJAARInnspub Net
Salt stress is induced by Nacl and it minimizes the growth owing to variation in interior plant structure. The present work was designed in line to investigate the behavior of Gazania harlequin (L.) seedlings were raised with dissimilar salt combinations (25 ppm, 50 ppm, 75 ppm & 100 ppm of NaCl solution). The CRD experiment with 4 repetitions was done. The NaCl treatments were repeated in 4 times with 20 days interval totally for 80 days after transplanting in pots. Anatomical observations were recorded by the microscope of in NaCl affected growth leaf. The results illustrated that salinity levels had a negative effect on anatomical characters as (xylem region, phloem region, cortex region, epidermis region and density of leaf lamina). So, it is concluded from the study that control treatment (without salinity effect) showed improved outcome comparatively others treatments which were under the saline situation. As the salinity increases ultimately it affects leaf anatomy of the plant.
ABSTRACT- Germination one of the most important stages of development, the basic requirement for having the proper
density is farm. In order to choose wheat lines tolerant to drought during seed germination factorial experiment in a
randomized complete block design with three replications were run Agricultural Research Center in Tehran. The
treatments included 40 genotypes of wheat and different levels of PEG (zero, 3-, 6- and 9-charge time). Traits such as root
length, coleoptile length, stem length, the root / shoot ratio, root dry weight and the percentage of germination rate were
measured. The results showed that all traits of drought stress significantly reduced the decline in all the traits of a potential
change of 3 bar to 6 bar, and the results showed that the root length of shoot length other traits for drought levels was
significant, but the interaction was not significant cultivar × drought. With increasing stress, most traits are reduced, the
minimum impact of drought on root to shoot ratio and root dry weight was the most affected.
Key-words- Polyethylene glycol, Osmotic stress, Germination, Wheat, Genotype
The present study investigates the growth and developmental changes of Pearlmillet [(Pennisetum glaucum (L.) R.Br.)] and Ragi [Eleusine coracana (Gaertn )] under pot culture experiments with different concentrations of aqueous leaf extracts (5, 10, 20, 30 and 50g/l) of Teak. Teak leaf extracts showed an inhibitory and stimulatory effects on germination, seedling length, biomass, pigments and biochemical constituents of pearl millet and ragi. The 5g/l concentration of extract stimulated the seed germination, seedling growth and biochemical constituents of pearl millet and ragi.. The higher concentrations (10, 20, 30and 50g/l) showed an inhibitory effects in all the parameters studied in the two economically important cereals. The degree of retardation was dependent on the concentration of the Teak leaf extracts. Root length, Shoot length, Biomass and Biochemical constituents of ragi seedlings were highly reduced at 50g/l concentrations of aqueous leaf
extracts of Teak. Between pearl millet and ragi seedlings, more allelopathic influence was observed in ragi than pearl millet seedlings.
Morphological and physiological attributes associated to drought tolerance of...Innspub Net
The experiment was conducted to assess the differential morpho-physiological response to stimulated water deficit and to determine the relationship between some of these morphological and physiological traits and yield components of eighteen durum wheat genotypes grown in pots under lathhouse condition. Water deficit significantly affected gas exchange and chlorophyll fluorescence parameters. It reduced the net photosynthesis rate (Pn), transpiration rate (E) and stomatal conductance (gs) measured both at anthesis and grain-filling stages. Similarly, the value of initial fluorescence (Fo) was increased while variable fluorescence (Fv), maximum fluorescence (Fm) and optimum quantum yield fluorescence (Fv/Fm) were decreased under water deficit. RWC of the leaves was decreased by 36.7% while SLA increased by 12.6% due to moisture stress relative to the well-watered control. No significant correlations were found between chlorophyll fluorescence parameters and grain yield under water deficit condition. Similarly, no significant correlations were found between leaf gas exchange parameters and grain yield. On the other hand, peduncle length and excursion were positively correlated with grain yield while negatively correlated with drought susceptibility index under water deficit condition. Leaf posture and rolling had also a profound effect on grain yield and other attributes. Erect-leaved genotypes had more grain yield, HI, kernel numbers per spikelet and grain-filling rate but had lower kernel weight than droopy leaved. Similarly, genotypes exhibited strong leaf rolling under water deficit condition had more grain yield, kernel numbers per spike and water use efficiency. The genetic variability found for leaf posture, leaf rolling, peduncle length and excursion among the Ethiopian durum wheat genotypes suggests the opportunity for selection superior and adapted genotype in water-limited environments. These can be achieved by integrating these morphological traits as indirect selection in conjunction with other yield components. Get the full articles at: http://www.innspub.net/volume-1-number-2-april-2011-2/
There is a great contamination of water, soil, air, soil erosion, pest resistance
and extensive use of chemical fertilizers cause a turn to induce agriculture for
producing safe and clean products. For this purpose, by using natural materials like
algae on the beach, organic and environmentally friendly fertilizer was prepared. In
this investigation effect of Seaweed Liquid Fertilizer (SLF) of Ulva fasciata at
concentrations of 0%, 2.5%, 5%, 7.5% and 10% on some parameters of wheat
(Triticum aestivum var. chamran) has been investigated. Based on the results, above
algae can be used as a food supplement solution in the form of foliar spray at 2.5%
concentration with a significant increase in morphological and biochemical indices.
Evaluation of air pollution tolerant tree species for Kothagiri Municipal Town, the Nilgiris, Tamil Nadu.
Senthilkumar P and Paulsamy S.
Journal of research in Biology (2011) 2: 148-152
Abstract:
Air pollution tolerance index (APTI) has been determined by pooling the at-tributes viz., total chlorophyll, ascorbic acid and moisture content of leaves and leaf extract pH for certain locally available tree species in and around Kothagiri Municipal Town, the Nilgiris. Of the 24 species analyzed 6 tree species such as Alnus nepalensis, Callistemon lanceolata, Eucalyptus ficifolia, Ficus elastica, Michelia champaca and Toona ciliate recorded higher APTI values. Hence, it is suggested that these tree spe-cies can be given priority for plantation programme in and around industrial com-plexes, road sides and also new urbanized areas in Kotagiri so as to reduce the effect of air pollution and makes the environment clean.
Drip Fertigation in Sweet Pepper: A ReviewIJERA Editor
Sweet Pepper is one of the most important vegetable crops grown in India. Water has been identified as one of the scarcest inputs, which can severely restrict its growth unless it is carefully conserved and managed. Adoption of modern irrigation technique like drip irrigations is needed to be emphasized to increase water use efficiency and covering more area under irrigation. Drip fertigation is the most effective way to supply water and nutrients to the plants which not only saves water but also increases yield of fruits and vegetable crops. As reported by different research workers of the world, adoption of drip fertigation in sweet pepper results in saving of fertilizer up to 25 per cent, water saving up to 40 percent significant increase in yield, significant increase in water use efficiency and better quality produce.
Physiological and biochemical response of common bean genotypes (Phaseolus vu...Premier Publishers
A field experiment was established over three rainy seasons (2011, 2012 and 2013) at two locations (Shaban and Al-Qaidah) which represented the severe (SDS) and moderate (MDS) drought stress in the southern highlands of Yemen-Ibb. The experiment was arranged in a split plot design with three replication. The main plots were: untreated or treated seeds with 0.5 mM salicylic acid (SA), the subplot were nine CIAT bean lines and three local cultivars. The results revealed that salicylic acid improved significantly the yield and yield traits of some genotypes. Accordingly, under severe drought stress, the bean genotypes categorized into three groups; The first group (MIB-156, MIB-156, G23818B and NSL) which were high yielding and low responsiveness genotypes to SA group (HY-LSAR); The second group (BFB-139, BFB-140 and BFB-141) that perform low yielding and high responsiveness genotypes to SA (LY-HSAR) and the third group (Taiz-304, Taiz-5 and Taiz-306) that perform low yielding and low responsiveness genotypes to SA group (LY-LSAR). It is concluded that the physiological mechanism of bean cultivars response of the high tolerant lines (LY-HSAR) and the medium tolerant lines to drought (LY-HSAR) to SA was similar by causing significant increase in dry matter accumulation, photosynthetic pigments content of leaves and accumulation of high proline content, total soluble sugars, total free amino acids, and soluble proteins, and also by maintain high relative water content (RWC%) and low leaf ion leakage (LIL%) in comparison to susceptible cultivars to drought (LY-LSAR).
Methylene blue is widely used in various industrial branches. Due to insufficient treatment, its occurrence in wastewater is frequently detected, which may result in serious environment problems to aquatic organisms. Hydroponic experiments were conducted with rice seedlings (Oryza sativa L. cv. XZX 45) exposed to methylene blue to determine the effective concentration using relative growth rate and water use efficiency as response endpoints. Results showed that acute toxicity of methylene blue to rice seedlings was evident. Although a linear decrease in relative growth rate and water use efficiency was observed in rice seedlings with increasing methylene blue concentrations, relative growth rate of rice seedlings was more sensitive to change of methylene blue than water use efficiency. Using non-linear regression, EC-48 h values for 10%, 20% and 50% inhibition of the relative growth rate were estimated to be 1.54, 3.22 and 10.13 mg MB/L for rice seedlings exposed to methylene blue, respectively, while smaller EC were obtained for 96 h exposure. In conclusion, the toxic response of young rice seedlings to methylene blue is obvious and inhibitory effects are highly dependent on response endpoints and the duration of exposure period.
Exogenous application with plant growth promoting rhizobacteria (PGPR) or pro...Agriculture Journal IJOEAR
Abstract— A pot experiment was conducted to investigate the effects of plant growth promoting rhizobacteria (PGPR) like Azotobacter chrocoocum A101, Pseudomonas fluorescens, pseudomonas mendocina Palleroni 1970 and Azospirillum lipoferum N040 or proline on growth traits, photosynthetic pigments, relative water content (RWC), electrolyte leakage percent (EL%), osmoprotectants such as proline and soluble sugars, activities of antioxidant enzymes like peroxidase (POD), polyphenol oxidase (PPO) and catalase (CAT), oil percent and water use efficiency (WUE) of basil plants subjected to water stress. Plants were treated with two regimes of irrigation water, i.e., 100% of evapotranspiration (ETc) (control) and 60% of ETc and PGPR or proline. Growth traits, photosynthetic pigments, RWC, EL %, proline and soluble sugars concentrations, activities of antioxidant enzymes oil percent and water use efficiency (WUE) were significantly altered by water stress and PGPR or proline treatments. Results indicated that PGPR or proline mitigated the water stress and significantly reduced the reduction in growth traits and leaf water content as compared to non-PGPR or proline-treated water-stressed plants. Water-stressed plants treated with PGPR or proline had significant higher photosynthetic pigments, proline and soluble sugars concentrations than water-stressed plants without PGPR or proline treatments. Higher POD, PPO and CAT activities were also observed in water-stressed plants treated by PGPR or proline than water-stressed plants without PGPR or proline treatments. Furthermore, water-stressed plants treated with PGPR or proline treatments had also significant higher oil percent and WUE as compared to water-stressed plants without PGPR or proline treatments. These results are important as the potential of PGPR or proline to alleviate the harmful effects of water stress and offers an opportunity to increase the resistance of basil plants to growth under drought conditions. The protective action of PGPR was more efficient than proline.
Effects of salinity stress on growth, Water use efficiency and biomass partit...Innspub Net
Future crop production is predicted to face significant challenges from salinity stress due to secondary salinization. Therefore future-proofing crop production in these conditions is an essential path towards addressing food security. We evaluated the effect of irrigation with water of 0, 4 and 8 ppt salinity on growth, biomass partitioning, WUE and chlorophyll fluorescence of Vernonia hymenolepis A.Rich as ameliorated by fertilization with three levels of NPK20:10:10. Data were analysed for variance using the General Linear Model ANOVA procedure, after positive tests for normality and homogeneity of variance. Means were separated through the Dunnett test. Pearson Correlation was done to determine relationship between variables and these were spatially projected using the Factor Analysis procedure, without rotation. Under fertilization at 8 g NPK20:10:10 per plant, growth was stimulated by salinity increase to 4 ppt (35.43cm) compared to 30.43cm for control plants. Fertilizer application significantly improved all the biomass fractions of plants irrigated with water of 4 ppt relative to the control, while root:shoot ratios were highest for unfertilized plants indicating resource re-allocation to roots for better foraging. Chlorophyll fluorescence ranged between 0.716 and 0.727 and did not differ significantly across treatments. These values indicate that all treatments were under stress, including control plants. Values of WUE and RGR indicate that fertilization of plants irrigated with water of 4ppt salinity enhances growth and Harvest Index of V. hymenolepis, in spite of the registered stress. This is significant to future food security.
Influence of vermicomposted soil amendments on plant growth and dry matter pa...Premier Publishers
The present experiment was undertaken to evaluate the effects of different vermicompost substitutions for vlei soil in seedling nursery production. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. Cucumber (Cucumis sativus) seeds were planted in five treatment groups including without vermicompost, 25% vermicompost, 50% vermicompost, 75% vermicompost and 100% vermicompost. Vlei soils were incorporated into the experiment making up the different supplements. There was significant (P<0.05) influence of vermicompost amendments. Tallest seedlings were recorded from V50%(13.2cm) and V75%(12.6cm) and means from treatments V25%, V50% and V75% were significantly higher than treatment V0%. Treatment V100% recorded the highest number of leaves(5.88). Highest root fresh weight was recorded from V50%(2.16g). All treatments revealed a significant difference amongst the treatments with V50% having the highest shoot dry weight of 2.22g. The means for treatments V50% and V75% were significantly higher than the treatment V0%. The highest fresh weight (11.31g) was recorded from V50%. All means for plant dry weight with vermicompost amendments were significantly higher than no vermicompost treatment (V0%). A ratio of 1:1 vermicompost and vlei gave the best results. These finding indicate that instead of using vermicompost alone, its use in mixtures with vlei gives the same effect.
— The present study was conducted to evaluate the plant growth, physiological and biochemical changes of neem under different salinity levels (4, 8, 10 and 12 dS/m) which have multipurpose use in agroforestry. Growth parameters, photosynthetic pigments, carbohydrate, proline and total phenol were investigated 30, 60, 90 and 120 days after treatment imposition. The results revealed that salinity caused significant differences in all the growth parameters and the maximum reduction were observed when plants were exposed to high salinity (12 dS/m) level and minimum were in control treatments. It was found that total dry matter and relative water content were reduced 72% and 40% in 12 dS/m compared to control plants at 120 DATI, respectively. By increasing saliniy 0 to 12 dS/m, the chlorophyll (the photosynthetic pigment) and carbohydrate (the photosynthetic product) content decreased, but increased the level of proline (an amino acid) and total phenol content (an antioxidant) in different days. The highest accumulation of free proline and total phenol content was recorded in 10 dS/m treatment and it was 77% and 59% greater than control plant, respectively. These findings suggest that though growth and biochemical parameters of neem were affected by salt stress, but all the plants survived in different salinity levels. Among all different salinity levels, neem can performed better up to 10 dS/m salinity level could be due to better antioxidant system of neem to cope up with oxidative damage to stressed plants.
Effectiveness of various salinity on leaf growth of Gazania | IJAARInnspub Net
Salt stress is induced by Nacl and it minimizes the growth owing to variation in interior plant structure. The present work was designed in line to investigate the behavior of Gazania harlequin (L.) seedlings were raised with dissimilar salt combinations (25 ppm, 50 ppm, 75 ppm & 100 ppm of NaCl solution). The CRD experiment with 4 repetitions was done. The NaCl treatments were repeated in 4 times with 20 days interval totally for 80 days after transplanting in pots. Anatomical observations were recorded by the microscope of in NaCl affected growth leaf. The results illustrated that salinity levels had a negative effect on anatomical characters as (xylem region, phloem region, cortex region, epidermis region and density of leaf lamina). So, it is concluded from the study that control treatment (without salinity effect) showed improved outcome comparatively others treatments which were under the saline situation. As the salinity increases ultimately it affects leaf anatomy of the plant.
ABSTRACT- Germination one of the most important stages of development, the basic requirement for having the proper
density is farm. In order to choose wheat lines tolerant to drought during seed germination factorial experiment in a
randomized complete block design with three replications were run Agricultural Research Center in Tehran. The
treatments included 40 genotypes of wheat and different levels of PEG (zero, 3-, 6- and 9-charge time). Traits such as root
length, coleoptile length, stem length, the root / shoot ratio, root dry weight and the percentage of germination rate were
measured. The results showed that all traits of drought stress significantly reduced the decline in all the traits of a potential
change of 3 bar to 6 bar, and the results showed that the root length of shoot length other traits for drought levels was
significant, but the interaction was not significant cultivar × drought. With increasing stress, most traits are reduced, the
minimum impact of drought on root to shoot ratio and root dry weight was the most affected.
Key-words- Polyethylene glycol, Osmotic stress, Germination, Wheat, Genotype
Effect of the exposure period to different water salt levels on the morpholog...AI Publications
The increasing salinity of water and soil is one of the environmental factors that most threatens the sustainability of olive cultivation systems in the Mediterranean basin. The identification of plant material with high tolerance to this stress would be one of the ways to solve this challenge, but it is generally a slow and expensive process. The selection of the most reliably parameters involved in the response of the plant to salinity and that are easy to evaluate, could help to speed up the identification of the most tolerant genotypes. The objective of this study is to determine the most interesting morphological characters which could be used in future as early criteria in the selection process of olive tolerant genotypes. For that, young plants, three-month-old, were exposed to salinity (0, 4 and 8 g/L NaCl) during different periods of time (30, 50 and 70 days), and several morphological parameters were assessed. The obtained results showed that most of the parameters were affected by the concentration 8 g/L of NaCl after a treatment period of 50 days. The most affected parameters by this level of salinity were the plant height, the leaf number and the number of lateral shoots. The PCA analysis showed that the number of lateral shoots was poorly correlated with the other parameters, but the height and the leaf number were highly correlated with each other.
Alleviation of Salinity Effects by Poultry Manure and Gibberellin Application...IJEAB
Capsicum is one of the most widely consumed vegetables and is also used as a spice for its pungency. Many species of Capsicum are being cultivated worldwide. Capsicum is considered as a commercial crop for their economic value. However, the yield of the crop suffers severely due to salt stress, Soil salinity reduces water availability of plant roots via negative (low) osmosis potential, as well as decrease of germination dynamics of plant seeds by ionic toxicity of Na and Cl , Significant differences in fruit-set, yield, photo synthetic rates, stomata conductance, total chlorophyll content, proline, In general, salinity affects almost every aspect of the physiology and biochemistry of plants. The aim of this study was to determine the salt tolerance of pepper (Capsicum annuum L) under salinity stress by saline irrigation water, Poultry and gibberellins applications were used to alleviated the negative effects on growth parameters and yield of Pepper under salinity stress. The water salinity levels led to a significant elevation in the values of electrical conductivity of the soil with the peroxidase activity, and Sodium and proline contents in leaves, while resulting in decrease in growth parameters and leave contents of ( NPK),The poultry and gibberellins applications increased the growth parameters ( Dry weight of shoot and root &fruit weight) and (NPK) contents in leaves with slight dropping of peroxidase activity in leaves while a clear dropping of sodium and proline contents in leave. That possible to mitigation the negative affect of salt stress by some application like exogenous hormones and Decomposed organic matter to solve the disruption of endohormons and lack of available nutrients under salt stress, and elevation of osmotic stress in soil solution in roots area. The GA & poultry application improved the growth and it has increased the Pepper tolerance to the abiotic stress which was exerted by saline irrigation water.
Stressful environments such as salinity and drought was assessed on photosynthesis, the most fundamental and intricate physiological process of three oil plants canola (BrassicanapusL.), safflower (Carthamustinctorius L.) and sunflower (Helianthus annusL) grown in different sites in Egypt (Suez road; North Coastal area; El-Kantra East) , is also severely affected in all its phases by such stresses .
Effect of seaweed liquid fertilizer (slf) prepared from sargassum wightii and...researchagriculture
The effect of Seaweed Liquid Fertilizer (SLF) of Sargassum wightii and Hypnea musciformis were evaluated on the seedling growth and biochemical parameters of the pulse, Cyamopsis tetragonoloba (L). The seeds of C. tetragonoloba soaked in SLF performed better when compared to the water soaked controls in terms of growth and certain biochemical attributes. The seeds were sown in soil and SLF were added to soil bed in four different concentrations separately (0.5%, 1%, 2% and 5% w/v). C. tetragonoloba seedlings showed positive response at 0.5% concentration of aqueous seaweed extracts in almost all the growth parameters studied. Similarly, a significant increase in the content of photosynthetic pigments and biochemical constituents such as soluble protein and starch was noted. The use of Sargassum and Hypnea extracts proved to be effective.
Article Citation:
Thambiraj J, Lingakumar K and Paulsamy S.
Effect of seaweed liquid fertilizer (SLF) prepared from Sargassum wightii and Hypnea musciformis on the growth and biochemical constituents of the pulse, Cyamopsis tetragonoloba (L).
Journal of Research in Agriculture (2012) 1(1): 065-070.
Full Text:
http://www.jagri.info/documents/AG0023.pdf
Effect of seaweed liquid fertilizer (SLF) prepared from Sargassum wightii an...researchagriculture
The effect of Seaweed Liquid Fertilizer (SLF) of
Sargassum wightii
and
Hypnea
musciformis
were evaluated on the seedling growth and biochemical parameters of
the pulse,
Cyamopsis tetragonoloba
(L). The seeds of
C. tetragonoloba
soaked in SLF
performed better when compared to the water soaked controls in terms of growth
and certain biochemical attributes. The seeds were sown in soil and SLF were added
to soil bed in four different concentrations separately (0.5%, 1%, 2% and 5% w/v).
C.
tetragonoloba
seedlings showed positive response at 0.5% concentration of aqueous
seaweed extracts in almost all the growth parameters studied. Similarly, a significant
increase in the content of photosynthetic pigments and biochemical constituents such
as soluble protein and starch was noted. The use of
Sargassum
and
Hypnea
extracts
proved to be effective.
Physiological Assessments of Sweet Sorghum Inoculated with Azospirillumbrasi...Agriculture Journal IJOEAR
Abstract—Some factors, such as yield increase and production cost reduction, must still be assessed as a way toimprove the sweet sorghum success prospects. The use of plant growth regulator mixtures has shown significant results in crop yield.Nitrogen assimilation stands out as one of the main limiting factors in plant production. Given the physiological effects of plant growth regulators and their mode of action in the photosynthetic metabolism, the aim of the current study is to assess the physiological responses of sweet sorghum plants inoculated with Azospirillum brasilenseto the use of nitrogen fertilization and plant growth regulators. The experiment comprised split plots, with four repetitions. The treatments comprised nitrogen (0, 40, 80, 120 and 160 kg ha-1) and biostimulant levels (0, 300, 400, 500 and 600 mL ha-1) in sweet sorghum culture inoculated with Azospirillum brasilense. Variables such as gas exchange and total recoverable sugars (TRS%) were assessed. The application of plant growth regulator at the dose 440.7 ml ha-1 showed the highest photosynthetic efficiency up to 46 DAE. According to the experimental conditions, the plant growth regulator treatment had no effect on the TRS %. It is concluded that the plant growth regulator did not affect the production of sugars by the plant.
Induced mutagenesis was carried out in an important protein rich pulse crop (Vigna radiata (L.) Wilczek). The seeds of green gram variety Co-6 were treated with different concentrations of sodium azide. The mutagen treated seeds were sown in the field to observe M1 characteristics. The sodium azide treated seeds were subjected to amino acid analysis. Totally 19 amino acids were recorded in control and sodium azide treated samples. In the process of sodium azide treatments a few amino acids were increased and some amino acids were decreased than control. The M1 parameters such as germination and survival percentage, plant height, days taken for flowering, number of pods/plant, length of pods, number of seeds/pod and hundred seeds weight were decreased with increasing concentrations sodium azide and all the growth parameters showed negative trend when compared to control. The M1 seeds were collected separately based on concentrations of sodium azide and stored for raising next generation after the harvest. The M1 seeds were sown in the field to raise M2 generation, and in M2 population, the different types of chlorophyll and viable mutants were noticed, such as chlorina, xantha, viridis, and viable mutants such as tall, dwarf, leaf, pod and early flowering mutants were noticed in various treatments of sodium azide. In addition with chlorophyll and viable mutants several initial leaflet modifications like trifoliate, tetrafoliate and pentafoliate leaflets had been observed in mutagenic treatment with sodium azide. The present study is a basis for evolving mutant varieties in green gram with altered agronomic traits.
Diversity of drought tolerance and seed yield in sunflower (Helianthus annuus...Innspub Net
Randomized complete block design with four replications in two drought and non-drought environments was used for this study. Drought resistance indices were calculated based on seed yield in stress and non-stress conditions. The results showed that GMP and STI were the best drought resistance indices so had the positive and significant correlation with Yp and Ys. Three dimensional graph showed that RFG5*AF80, G-543 and Farokh were the drought resistant hybrids. These hybrids had the highest amount of Yp, Ys, GMP and STI that revealed the highest yield potential as well as drought tolerance in these genotypes. Because of that these hybrids have promised potential to cultivate in drought prone environments. Regression analysis revealed that the traits grain filling rate, grain filling duration and water use efficiency accounted for 97.0% of total variation exist in seed yield. Path coefficient analysis demonstrated the highest and positive direct effect of grain filling rate and grain filling duration on seed yield in sunflower hybrids. Water use efficiency had low direct effect while high indirect effects via grain filling duration on seed yield. Therefore, the study revealed the importance of total grain filling rate and grain filling duration as indirect selection criteria for genetic improvement of seed yield in sunflower breeding programs especially in early generations. On the other hand, indirect effects of water use efficiency through grain filling duration on seed yield have promising result in selection programs. Get the full articles at: http://www.innspub.net/volume-6-number-5-may-2015-jbes/
The journal is an open access, international, double-blind peer-reviewed journal publishing research articles, Invited reviews, short communications, and letters to the Editor in the field of agriculture, fisheries, veterinary, biology, and closely related disciplines. Alinteri Journal of Agriculture Sciences is being published online biannually as of 2007. Alinteri Journal of Agriculture Sciences aims to create an environment for researchers to introduce, share, read, and discuss recent scientific progress. We adopt the policy of providing open access to readers who may be interested in recent developments.
Effect of Stress on Selected Edible PlantsYogeshIJTSRD
Two edible plants Lablab purpureus of the Fabaceae and Cucumis sativus of the Cucurbitaceae have been studied by stress analysis. Salt stress is caused by excessive accumulation of salt in the soil, either directly because of salinization, or indirectly because of water loss. As a consequence, the soil water potential progressively decreases and eventually stopping the gradient of water flow from roots region to upper most part shoot and leaf . In this paper, both edible plant seeds are allowed to different stress conditions salt, dark and sugar . The different concentration of salt such as 10ppm, 25ppm, 50ppm, dark condition and 10ppm of sugar solution are used. Both plant seeds measurement was taken at the interval of 10 days. Generally first germination was seen within 3 days in a pot after sowing of seeds. In both plant, control pots showed normal growth of seeds. Treatments are shown the variation. Stress analysis is further confirmed by proline analysis. This paper revealed that stress analysis of entirely two different family members such as Lablab purpureus and Cucumis sativus M. Dhanasekaran | G. S. Nandhakumar | R. Thayalan "Effect of Stress on Selected Edible Plants" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-4 , June 2021, URL: https://www.ijtsrd.compapers/ijtsrd41314.pdf Paper URL: https://www.ijtsrd.combiological-science/botany/41314/effect-of-stress-on-selected-edible-plants/m-dhanasekaran
Effects of some environmental factors on annual weed shepherd's purse (Capsel...Innspub Net
Shepherd’s purse (Capsella bursa-pastoris (L.) Medik.) is an annual weed species with a wide distribution in cereals of East Azarbaijan, Iran. Tow experiments were carried out based on randomised complete block design with four replications in Tabriz, Iran in 2014 to evaluate the effects of salinity and drought stress on shepherd's purse germination and early seedling growth. The salinity levels were included 0, 4, 8, 12, 16 and 20 dS m-1 (deci Siemens per meter) sodium chloride (NaCl). The drought stress levels were included 0, -0.4, -0.8, -1.2, -1.6 and -2.0 MPa osmotic potentials were obtained by polyethylene glycol 8000 as osmotica. Results indicated that the effect of salinity was significant on seed germination percentage and rate, seedling root and shoot length and seedling dry weight. The all traits reduced significantly by increasing the salinity level. In salinity of 20 dS m-1 the germination% of shepherd's purse was < 35 and the seedling dry weight reduced 65% in comparison with control (0 dS m-1). Also the effect of drought stress was significant on seed germination, seedling length and seedling dry weight and all the traits decreased by increasing the osmotic potential. The germination% of shepherd's purse seeds in osmotic potential of -2.0 MPa was < 32 and the reduction in seedling dry matter was > 60%. Generally, it could be concluded that drought stress such as limited irrigation and salinity would be effective strategy for reduction in germination and early seedling growth of this annual weed species. Get the full articles at: http://www.innspub.net/volume-6-number-5-may-2015-jbes/
Objectives: The present study aisms to determine the effect of salt stress on the total lipid composition for two varieties of banana (Musa acuminata) viz., great dwarf and small dwarf variety. The presence of different concentrations viz.,. triglycerides and diglycerides did not influenced the increasing salt concentration in the medium. However, monoglycerides and free fatty acids were more affected by the effect of salinity.
Regarding the large dwarf variety, the absence of triglycerides noted, especially in the stressed plants and also in the control plants. In the light of our results we saw that the membrane lipids in the vast dwarf were less affected by salinity compared to the small dwarf
Considering the effects of chemical herbicide application, biomarkers have
now become more widely considered for controlling weeds. Allelopathy demonstrates
the potential for this through the release of trace elements from decomposable plant
leaves, seeds, stems and strains. In order to investigate the effects of aqueous extract
of sunflower on the germination and morphological characteristics of Rumex acetosa,
Lepidium draba and Convolvulus arvensis seedlings as three common weeds in sugar
beet fields, a research experiment was carried out in the laboratory of Islamic Azad
University, Neishabour, in 2016 as a factorial in the form of completely randomized
design with four replications. The experimental treatments were aqueous extract of
sunflower (zero, 25%, 50%, 75% and 100%), the type of weed in three levels (Rumex
acetosa, Lepidium draba and Convolvulus arvensis), respectively. The results showed
that the highest percentage and rate of germination were observed in non-use of
sunflower extract (irrigation with distilled water), which in Rumex acetosa 97 and 33
percent were higher respectively, in comparison to Lepidium draba and Convolvulus
arvensis. In the study of stem fresh weight, fresh and dry weight of roots, it showed
that the field bindweed plant was more resistant compared to Rumex acetosa,
Lepidium draba. The lowest germination and seedling traits were obtained in 100% of
sunflower aqueous extract, which affected the weeds of the Ivy and Blacks, and the
sorrel was more resistant. According to the results, sunflower extract as a strong
combination for weed control can have promising results for sustainable agriculture.
In order to have data on the consumption of okra in Ivory Coast, a survey was
carried out in a school in the town of Adjamé among young people aged between 15
and 35 years. The survey showed that all respondents knew okra 57.80% of
respondents appreciate okra fresh, 39.20% dry and 03% do not appreciate at all the
okra. It also showed that 18.60% of respondents appreciate the sauce gombo, 20.80%
gouagouassou the sauce, the 13.80% Kopé sauce, 39.20% djoumblé the sauce, sauces
made 0.8% made from sheets of okra. 06.80% do not like these sauces. All people
surveyed know the varieties of "Gombo baoule" and "Gombo dioula." In conclusion,
the existing prejudices about fresh okra are the dried okra is more popular among
young people in Côte d'Ivoire.
Five diets (diets incorporated with folic acid, vitamin B, vitamin C, vitamin/
mineral mix and control) were used to determine their effects on survival, digestive
enzyme activity, protein profiling and growth of striped snakehead Channa striatus
fingerlings. All vitamin diets showed significant difference in enzyme activity like
protease, amylase and lipase, when compared to that of control. The fingerlings fed
with vitamin C diet showed significantly (P<0.05) better performance in terms of
survival rate, weight gain and Specific Growth Rate (SGR) when compared to the rest
of the four diets. The electrophoretic studies revealed that high molecular weight
fractions were added up in muscle tissue of C. striatus fed with vitamin and mineral
supplemented diets.
Mining is considered as a difficult and harmful job as it is done in a very
difficult physical and environmental condition. In addition to that, miners are exposed
to the dangers, damages and even death because of the bad condition of mines. The
dangers of mines are different in accordance with the kind of mine which may be
underground or surfaces. The dangers may be a bit different in different cities and
mines. Main harmful factors in mining are the physical damages, hyperthermia,
hearing loss, lung diseases, musculoskeletal diseases and facing with dangerous gases
and beams. The purpose of this essay is to examine the effect of physical, chemical
and biological harmful factor on miners. This survey has adopted descriptive method
and data are collected by library method. The results showed that the exposure of
chemical factors such as dust, methane and silica, and physical factors such as noise,
radiation, and biological factors may have great danger for miners.
The intensive study was conuducted for the prevalence and distribution of
Armigeres obturbans for the first time in the rural area surrounding Rajkot City. Seven
villages were identified for the study species identification, larval density, adult
density and distribution of breeding sites of the species. Results showed that adult
density of Ar. obturbans during monsoon was highest and post monsoon period was
most favourable for the species. Also the breeding sites of the species were recorded
more during this period. While during winter season majority of temporary breeding
sites dries out because of temperature decrease. Therefore, the temperature and
rainfall are the two variables that showed major effect on the breeding activities of
this species.
In order to assess the Myxosporeans fauna of Cameroon fresh water fishes so
as to find the fight strategies, 655 specimens (350 Oreochromis niloticus and 305
Barbus callipterus) were sampled in Mapé river (Sanaga basin) and examined.
Standard methods were used for the sampling of fishes, conservation and microscopy.
Morphometric characteristics of the spores were used for species identification. Two
new species belonging to the genus Myxobolus Büstchli, 1882 were described namely
Myxobolus tchoumbouei n. sp in Barbus callipterus which formed cysts within various
organs (fins, skin and operculum); Myxobolus mapei n. sp parasite of kidneys and liver
in Oreochromis niloticus and Barbus callipterus. Myxobolus tchoumbouei exhibited
very long spores (19.19 x 8.89 μm), pear-shaped with rounded anterior end
sometimes flattened. Polar capsules were dissymmetrical. They measured 7.60 x 3.00
μm for the bigger and 7.06 x 2.62 μm for the smaller. Myxobolus mapei n. sp had
ellipsoidal spores (13.50 x 6.83 μm) with unequal polar capsules. The larger polar
capsule (6.44 X 2.88 μm) was about 1.5 times longer than the smaller one (4.13 X 1.61
μm) and filled half of the spiral cavity. The awareness about these parasites is useful
to find fighting strategies.
Hyaluronic acid (HA) is also known by the name hyaluronan. The necessity for
using this fabulous material lead to investigate non-pathogenic strains which produce
this material. The most non-pathogenic strain is S. thermophilus. The lack of literature
on microbial production of this substance by the strain prompted us to examine the
microbial production of HA from it and also to examine optimization of culture
conditions where HA is produced. The bacteria Streptococcus salivarius sub.
thermophilus was obtained from the Bank of Scientific and Industrial Research of Iran
(PTCC 1738). To separate S. thermophilus strains from yogurts, three types of yogurts
were used. They were cultured by pour-plate and surface methods on STA medium. To
identify the isolated strains, biochemical tests and Polymerase Chain Reaction (PCR)
were used. Bacterial strains isolated from yoghurts were identified as S. thermophilus
MN-BM-A02, S. thermophilus JIM8232 and S. thermophilus MN-ZLW-002. To separate
the capsule strains, each strain was cultured on STB medium and then they were
centrifuged. In order to purify the samples, ethanol and charcoal were used. To
optimize production, variety of sources of carbon, nitrogen, temperature and pH were
studied.
The qualitative and quantitative dynamics of the copepod community in
Hendijan harbor was studied through zooplankton samples collected seasonally in
summer 2010 (July- August), autumn 2010 (October), winter 2011 (December-
February) and spring 2011(April). The copepods community was represented by 27
species, belonging to calanoida (16 species), cyclopoida (5 species), Poecilostomatoida
(3 species) and harpacticoida (3 species). The highest abundance of copepods was in
summer (14402±3352 Ind/m3) while the lowest was in winter (852±155 ind/m3). Of
the adult forms, Acartiella faoensis was the most abundant species, forming 19% of
the total copepods, followed by Paracalanus parvus (17%), Corycaeus andrewsi (13%)
and Clausocalanus arcuicornis (8%). Most of copepod species displayed distinct
seasonal occurrence relative to environmental conditions. The spearman’s correlation
revealed that temperature and salinity were the most important factor controlling the
size of copepods density in Hendijan harbor. The cluster analysis demonstrated
different types of association between copepods species. The highest value of
Shannon’s diversity index, Margalef index and Pielou’s evenness was noticed in
summer. These results revealed that the summer is different from other seasons of
the year and in this season the ecological situation is better and more stable than
other seasons in Hendijan shores waters.
The main purpose of this research was to investigate the women pregnancy healthy status and behaviors in Eastern-Azerbaijan province referred to the treatment health centers in 2012. The present study was a cross-section study. So 30
married women between 15-49 years old have been taken up randomly for family adjustment and mother health and pregnancy care. A questionnaire including the demographic features and other questions about the status and behavior of the
pregnancy health affairs were used to collect the results. The obtained data of these questionnaires were analyzed by SPSS software. The results that showed 63.8% had itching or the vaginal stimuli and 34.9% (52 ones) had bad-smelling secretions and
36.9% (55 ones) had intense pain around the abdominal area. The investigation of these infectious diseases through sexual path showed that about 0.5% (3 ones) are challenging with these mentioned disorders. The results of the barrenness showed that about 8.7% (52 ones) tried to get pregnant but they did not get pregnant.
The purpose of this research was to investigate the students' attitude and consciousness degree regarding the pregnancy health in 2013 in Eastern-Azerbaijan Province. So, 300 students in different semesters have been taken up as accidentally from Tabriz, Marand, Bonab, Maragheh and Ahar have been taken up in this study. The WHO illustrative questionnaire for interview-questionnaire designed by John Cleland surveys with young people has been applied in this study. The statistical data has been completed by the help of SPSS software and descriptive and t-test statistical cases. The results showed the attitude score from the family adjustment is significantly higher than the determined degree positively. The results showed the sexual diseases are significantly higher than the fixed determined degree positively. Also it showed there is no observed any significant difference between the degree of the conscious and the students' attitude based on their marital status The results did not show any significant difference regarding the degree of the attitude among students.
The main purpose of the present study was to determine the effect of regular home visits on the developmental indices of low birth weight infants. The present study was an on-site clinical investigation. 90 infants ranging between 1500 to 2500g born in Razi Hospital of Marand town having the entrance criteria to the present study were taken into consideration through the available sampling method and then they were divided into two intervention and control groups. The intervention group has received the whole routine cares since the first to fourth week and then they were visited at home for 45 minutes a week. The control group received the routine cares. The evolutionary indices of both groups were also completed monthly for three months by referring homes. The related data gathering tool was also subjected to the demographic information through registration list and the Persian version of the Low Weight Infant Inventory (LWII) (2 months) that have been completed by the researcher on the birthday, first, second and third months of the birth through the interview. SPSS-15 software and the application of the inferential and descriptive statistical tests (K2 and T-tests) were also applied in order to analyze the related data in this study. The significance level was considered as p<0.05.
More than half of these related research units of both groups had experience (61.5%) and control (55.8%) regarding all women in this study; the mean score of the low weight infants on the first month had not shown any statistical significant difference; but on the second months (p=0.04) and the third months (p=0.001), they had shown statistical significant difference progressively. The healthcare based on home-visit had influence on the recovery indices of the low weight infants. Hence, nurses and other health monitors of the infants should apply for the healthcare programs based on home-visit particularly in caring infants.
Protein was extracted from muscles of Channa striatus and attempts were
made to evaluate in vitro antibacterial activity against clinical bacterial isolates. The
higher concentration of protein (100μg/ml) extracts exhibited a pronounced activity
against Pseudomonas aeruginosa (21 mm), Proteus vulgaris (19 mm), Citrobacter sp
(19 mm), Klebsiella pneumoniae (18 mm), Micrococcus sp (17 mm), Bacillus subtilis (16
mm), Staphylococcus aureus (15 mm), E. coli (14 mm) and Serratia marcescens (5
mm). The minimum inhibitory concentration and minimum bactericidal concentration
were found to be 20-40 μg/ml and 80-100 μg/ml respectively for the extracts of
Channa striatus protein against test organisms. This study confirms that C. striatus fish
protein extracts possess antibacterial activity against a wide range of microbes and
justified that it could be used in the traditional medicine as a remedy for the
treatment of bacterial diseases.
Food security in a growing population with limited natural resources is one of
the most important issues of the world. Accumulation of heavy metals in food and
their concentrations increase and reaching to a risk limit can threaten human health.
The purpose of this study, is to study the heavy metals lead and cadmium in
vegetables, cultured on spinach and watercress at 10 Gardens of Ardabil. This study is
cross-sectional and 81 samples in water, soil, and spinach and watercress were
prepared during the months of June, July and August in 2015 and after preparation
according to the standard methods and using atomic absorption spectrophotometer
(Perkin Elmer) for the determination of heavy metals. SPSS software was used for data
analysis. The results showed that the mean level of lead and cadmium in all samples
were less than the EPA standard. Between studied orchards in terms of the amount of
cadmium and lead no statistically significant different was seen. The independent ttest
showed that in terms of cadmium between two species of spinach and watercress
there found a significant difference at the 5% level so that the amount of cadmium in
spinach was more than the watercress. Since the concentration of heavy metals in all
samples at second and third stages in July and August were zero, but in the first step
in June, the amount of heavy metals have been found in some samples showed that
all three samples of first cut had more contamination than second and third cut. And
in this case, the concentration of heavy metal pollution in hibernation at vegetable
gardens Ardabil is possible. The results of spinach cadmium amount in the first cut in
the three garden of viz.,3, 6 and 10 showed that in the garden (3), the amount of
cadmium in water is higher than the standard and is concentrated in spinach and the
gardens of 6 and 10 Cadmium in the soil of the gardens, is slightly higher that is
condensed in spinach thus it can be considered that spinach in terms of cadmium has
bioaccumulation.
Generally, the reconstitution of palaeo-geography and related environments
is based on the study of sediment markers such as grain size and clay mineralogy. In
this research, 90 surface and subsurface sediment samples from eight cores were
analyzed for grain size and clay mineralogy in southern part of Urmia lake coast and
adjacent areas. Abundant minerals are quartz, feldspars, calcite and dolomite. Heavy
minerals identified were epidote, hornblende and zircon. Clay minerals are Kaolinite
and Smectite mainly. Clay mineralogy and mean grain size of sediments in eight cores
of Urmia Lake; reflect climatic conditions in this region. Relatively coarse sediments
usually deposited during Urmia Lake low stands and relatively fine sediments
deposited during high stands. The mineralogy of the clay-size fraction was determined
by X-ray diffraction (XRD). Mineral assemblages display two climate conditions: Those
having large Kaolinite, quartz, and feldspar peaks but a small smectite peak
(interpreted to be cold times), and those with small Kaolinite, quartz and feldspar
peaks and a large smectite peak-(warm sediments). In addition, smectite content
correlate well with high mean grain size in Urmia Lake sediments, whereas sediments
rich in Kaolinite, quartz, and feldspar correlate well with finer mean grain size.
Chemical elements of the total sample are mainly of terrigenous origin, supplied by
“Discharge Rivers”, which discharges in Urmia Lake. Variations in clay mineralogy and
grain size didn’t indicate that the lake-level variations and nature of sediments
delivered to the lake vary in concert with global climate changes, recently. Human
activities such as Dams’ constructions and agriculture have probably induced
variations in the mobilization of chemical elements.
According to the Convention on the Law of the Sea 1982, constructing
artificial island is permitted and countries can construct artificial islands in their own
territory. Constructing artificial islands in the Persian Gulf area makes the countries in
the region, especially Iran, to pursue the issue with more sensitivity. According to data
dissemination principle of International Environmental Law, the countries that
construct artificial islands should notify other states regarding construction and
properties of their own artificial islands. Today, artificial island construction is being
increased and this has caused many environmental crises including increase of water
darkness and pollution and transport of coastal sediments. In this study, the
destructive results of constructing artificial islands in the Persian Gulf environment,
the effect of development of new land space from geopolitical view, and also
constructing artificial islands from the viewpoint of International Law of the seas have
been reviewed. Moreover, according to the fact that the notion of governance in
modern International Law have been modified regarding the use of environment and
sustainable development, the states will have limited right to construct artificial
islands.
The use of biotechnology in the propagation of plantain and
banana (Musa sp.) of great importance to induce, tolerant to plant genotypes for
diseases and high yield potentials. However, auxins and cytokinins should be used,
which are expensive and can sometimes cause changes in the regenerants obtained.
Both traditional growth regulators (auxins and cytokinins) and non-traditional growth
regulators (brassinosteroid analogues and mixtures oligogalacturonide) are used in
the in vitro propagation of crops, but mush progress has been hindering due to the
sufficient knowledge and impact of different phases prevailing in the
micropropagation of banana hybrid 'FHIA-18' (AAAB) is present hitherto. This work
was performed in order to evaluate the biological activity of an analogue of
brassinosteroids (Biobras-6) *ABr+ and a mixture of oligogalacturonide with the degree
of polymerization between 9 and 16 (Pectimorf) *mOLG+. The effect of ABr and mOLG
are determined as a substitute or complement of auxin (IBA or IAA) and cytokinin (6-
BAP) for the establishment of in vitro multiplication and rooting of plantlets and in the
acclimatization phase. Non-traditional regulators phenolization decrease the explant
growth in the establishment phase of in vitro propagation; but increased the number
of shoots per explants (above 3.5) and improved survival of vitro plant during the
acclimatization phase.
Kumaun Himalaya, in the Indian Himalayan region, has a rich diversity of
medicinal plants, which are widely used in traditional medicinal systems. The present
paper concludes the diversity, vernacular names, associated authorship, ethnomedicinal
uses and use pattern, life form; plant part used and accession number of the
medicinal flora together. The paper describes distribution and local/traditional uses of
the 256 medicinal plants representing 96 families, in which pteridophytes were 1%,
trees were 18%, shrubs were 25%, herbs were 52%). Various plant parts used in
formulations, such as: underground part- 33%, leaves- 24%, whole plant- 11%, bark-
7%, seeds- 7%, resin /latex/oil- 4%, stem/ shoot/ wood- 4%, flowers and
inflorescences- 5%, fruits and nuts- 5% were used in different ailments.
Cardiovascular diseases are considered as one of the threats to human
health, especially, in individuals with overweight. The aim of this study was to
investigate the effect of eight-week aerobic exercises in 10 to 12 years old overweight
girls. In this study, 27 overweight female student whit 10-12 years old were selected
and were randomly divided into two groups; a) training group (n=17) and b) control
group (n=10). Training group participated into the aerobic training for 8 weeks, with
70-85 percent of heart rate reserve maximum, 3 times a week and 60 minutes in each
session. The variables such as BF, BMI, WHR and VO2max, were measured in two
groups before and after the training period. The average of variables such as BF, BMI
and VO2max were significantly different between two groups (P<0.05). But the
average of WHR were not significantly different between two groups. According to
these results, aerobic exercise in 10-12 years old overweight girls, can have beneficial
effects on some cardiovascular risk factors.
Tomato contains vitamins A, C and lycopene etc., Red colour of tomato is
because of lycopene. Lycopene is recognized as a strong antioxidant, and is also an
anti-cancer substance. It prevents breast and prostate cancers. It also reduces the
aging process and removes free radicals damaging cells. Thus high quality fruits make
the tendency of people’s consumption for this strategic vegetable’s increase.
Genotypes prepared with its native from Russia, Netherlands and Iran were evaluated
and Chef cultivar was taken as a control. In this examination, 10 new genotypes were
analyzed as far as a few indicators of quality in Ahvaz. One of the tomato quality
assessment techniques is sensory lab assessment (plant test). This exploration was
completed at 2013 in Chamran University, Ahvaz, Iran. Genotypes mean comparison
showed that the most quality was related to M48, 21 genotypes and the lowest of this
was related to 16, 19 cultivars. Also result indicated that M48, 25 had the most
sourness and the lowest of this was belonged to cultivar 18. Chef cultivar as a control
had the fleshiest tissue and also 33 and 36 genotypes had the most appropriate colour
according of the consumer evaluation.
In this research in order to produce blood sugar biosensor, an appropriate
membrane for glucose oxidase immobilization by using nanofibers created from
polymers of polyacrylic acid and starch are studied. They are biocompatible and
biodegradable respectively and were prepared by electro-spinning method for
nanofiber fabrication. Dimethylformamide and distilled water were used as solvent for
PAA and starch respectively to get a homogeneous solution. Because nanofibers made
of polyacrylic acid-starch face with enzymes, due to its extremely high hydrophilic
‘OH’ groups may lose their cohesion, crosslinking as chemical surface modification
and for better enzyme immobilization, non-thermal plasma surface modification using
atmospheric pressure Dielectric Barrier Discharge (DBD) were used. Crosslinking was
carried out by APTMS and Glutaraldehyde (GA). The effect of electro-spinning process
variables on morphology of nanofibers was examined by Scanning Electron
Microscopy (SEM). Nanofibers structure and chemical composition to demonstrate
the successful linking and immobilization of enzymes in the composite membrane was
obtained by Fourier Transform Infrared spectroscopy (FTIR) and improved thermal
stability of nanofibers in presence of enzyme and surface modifications was
determined by Thermal Gravimetric Analysis (TGA).
THE IMPORTANCE OF MARTIAN ATMOSPHERE SAMPLE RETURN.Sérgio Sacani
The return of a sample of near-surface atmosphere from Mars would facilitate answers to several first-order science questions surrounding the formation and evolution of the planet. One of the important aspects of terrestrial planet formation in general is the role that primary atmospheres played in influencing the chemistry and structure of the planets and their antecedents. Studies of the martian atmosphere can be used to investigate the role of a primary atmosphere in its history. Atmosphere samples would also inform our understanding of the near-surface chemistry of the planet, and ultimately the prospects for life. High-precision isotopic analyses of constituent gases are needed to address these questions, requiring that the analyses are made on returned samples rather than in situ.
Introduction:
RNA interference (RNAi) or Post-Transcriptional Gene Silencing (PTGS) is an important biological process for modulating eukaryotic gene expression.
It is highly conserved process of posttranscriptional gene silencing by which double stranded RNA (dsRNA) causes sequence-specific degradation of mRNA sequences.
dsRNA-induced gene silencing (RNAi) is reported in a wide range of eukaryotes ranging from worms, insects, mammals and plants.
This process mediates resistance to both endogenous parasitic and exogenous pathogenic nucleic acids, and regulates the expression of protein-coding genes.
What are small ncRNAs?
micro RNA (miRNA)
short interfering RNA (siRNA)
Properties of small non-coding RNA:
Involved in silencing mRNA transcripts.
Called “small” because they are usually only about 21-24 nucleotides long.
Synthesized by first cutting up longer precursor sequences (like the 61nt one that Lee discovered).
Silence an mRNA by base pairing with some sequence on the mRNA.
Discovery of siRNA?
The first small RNA:
In 1993 Rosalind Lee (Victor Ambros lab) was studying a non- coding gene in C. elegans, lin-4, that was involved in silencing of another gene, lin-14, at the appropriate time in the
development of the worm C. elegans.
Two small transcripts of lin-4 (22nt and 61nt) were found to be complementary to a sequence in the 3' UTR of lin-14.
Because lin-4 encoded no protein, she deduced that it must be these transcripts that are causing the silencing by RNA-RNA interactions.
Types of RNAi ( non coding RNA)
MiRNA
Length (23-25 nt)
Trans acting
Binds with target MRNA in mismatch
Translation inhibition
Si RNA
Length 21 nt.
Cis acting
Bind with target Mrna in perfect complementary sequence
Piwi-RNA
Length ; 25 to 36 nt.
Expressed in Germ Cells
Regulates trnasposomes activity
MECHANISM OF RNAI:
First the double-stranded RNA teams up with a protein complex named Dicer, which cuts the long RNA into short pieces.
Then another protein complex called RISC (RNA-induced silencing complex) discards one of the two RNA strands.
The RISC-docked, single-stranded RNA then pairs with the homologous mRNA and destroys it.
THE RISC COMPLEX:
RISC is large(>500kD) RNA multi- protein Binding complex which triggers MRNA degradation in response to MRNA
Unwinding of double stranded Si RNA by ATP independent Helicase
Active component of RISC is Ago proteins( ENDONUCLEASE) which cleave target MRNA.
DICER: endonuclease (RNase Family III)
Argonaute: Central Component of the RNA-Induced Silencing Complex (RISC)
One strand of the dsRNA produced by Dicer is retained in the RISC complex in association with Argonaute
ARGONAUTE PROTEIN :
1.PAZ(PIWI/Argonaute/ Zwille)- Recognition of target MRNA
2.PIWI (p-element induced wimpy Testis)- breaks Phosphodiester bond of mRNA.)RNAse H activity.
MiRNA:
The Double-stranded RNAs are naturally produced in eukaryotic cells during development, and they have a key role in regulating gene expression .
Richard's entangled aventures in wonderlandRichard Gill
Since the loophole-free Bell experiments of 2020 and the Nobel prizes in physics of 2022, critics of Bell's work have retreated to the fortress of super-determinism. Now, super-determinism is a derogatory word - it just means "determinism". Palmer, Hance and Hossenfelder argue that quantum mechanics and determinism are not incompatible, using a sophisticated mathematical construction based on a subtle thinning of allowed states and measurements in quantum mechanics, such that what is left appears to make Bell's argument fail, without altering the empirical predictions of quantum mechanics. I think however that it is a smoke screen, and the slogan "lost in math" comes to my mind. I will discuss some other recent disproofs of Bell's theorem using the language of causality based on causal graphs. Causal thinking is also central to law and justice. I will mention surprising connections to my work on serial killer nurse cases, in particular the Dutch case of Lucia de Berk and the current UK case of Lucy Letby.
What is greenhouse gasses and how many gasses are there to affect the Earth.moosaasad1975
What are greenhouse gasses how they affect the earth and its environment what is the future of the environment and earth how the weather and the climate effects.
Slide 1: Title Slide
Extrachromosomal Inheritance
Slide 2: Introduction to Extrachromosomal Inheritance
Definition: Extrachromosomal inheritance refers to the transmission of genetic material that is not found within the nucleus.
Key Components: Involves genes located in mitochondria, chloroplasts, and plasmids.
Slide 3: Mitochondrial Inheritance
Mitochondria: Organelles responsible for energy production.
Mitochondrial DNA (mtDNA): Circular DNA molecule found in mitochondria.
Inheritance Pattern: Maternally inherited, meaning it is passed from mothers to all their offspring.
Diseases: Examples include Leber’s hereditary optic neuropathy (LHON) and mitochondrial myopathy.
Slide 4: Chloroplast Inheritance
Chloroplasts: Organelles responsible for photosynthesis in plants.
Chloroplast DNA (cpDNA): Circular DNA molecule found in chloroplasts.
Inheritance Pattern: Often maternally inherited in most plants, but can vary in some species.
Examples: Variegation in plants, where leaf color patterns are determined by chloroplast DNA.
Slide 5: Plasmid Inheritance
Plasmids: Small, circular DNA molecules found in bacteria and some eukaryotes.
Features: Can carry antibiotic resistance genes and can be transferred between cells through processes like conjugation.
Significance: Important in biotechnology for gene cloning and genetic engineering.
Slide 6: Mechanisms of Extrachromosomal Inheritance
Non-Mendelian Patterns: Do not follow Mendel’s laws of inheritance.
Cytoplasmic Segregation: During cell division, organelles like mitochondria and chloroplasts are randomly distributed to daughter cells.
Heteroplasmy: Presence of more than one type of organellar genome within a cell, leading to variation in expression.
Slide 7: Examples of Extrachromosomal Inheritance
Four O’clock Plant (Mirabilis jalapa): Shows variegated leaves due to different cpDNA in leaf cells.
Petite Mutants in Yeast: Result from mutations in mitochondrial DNA affecting respiration.
Slide 8: Importance of Extrachromosomal Inheritance
Evolution: Provides insight into the evolution of eukaryotic cells.
Medicine: Understanding mitochondrial inheritance helps in diagnosing and treating mitochondrial diseases.
Agriculture: Chloroplast inheritance can be used in plant breeding and genetic modification.
Slide 9: Recent Research and Advances
Gene Editing: Techniques like CRISPR-Cas9 are being used to edit mitochondrial and chloroplast DNA.
Therapies: Development of mitochondrial replacement therapy (MRT) for preventing mitochondrial diseases.
Slide 10: Conclusion
Summary: Extrachromosomal inheritance involves the transmission of genetic material outside the nucleus and plays a crucial role in genetics, medicine, and biotechnology.
Future Directions: Continued research and technological advancements hold promise for new treatments and applications.
Slide 11: Questions and Discussion
Invite Audience: Open the floor for any questions or further discussion on the topic.
Cancer cell metabolism: special Reference to Lactate PathwayAADYARAJPANDEY1
Normal Cell Metabolism:
Cellular respiration describes the series of steps that cells use to break down sugar and other chemicals to get the energy we need to function.
Energy is stored in the bonds of glucose and when glucose is broken down, much of that energy is released.
Cell utilize energy in the form of ATP.
The first step of respiration is called glycolysis. In a series of steps, glycolysis breaks glucose into two smaller molecules - a chemical called pyruvate. A small amount of ATP is formed during this process.
Most healthy cells continue the breakdown in a second process, called the Kreb's cycle. The Kreb's cycle allows cells to “burn” the pyruvates made in glycolysis to get more ATP.
The last step in the breakdown of glucose is called oxidative phosphorylation (Ox-Phos).
It takes place in specialized cell structures called mitochondria. This process produces a large amount of ATP. Importantly, cells need oxygen to complete oxidative phosphorylation.
If a cell completes only glycolysis, only 2 molecules of ATP are made per glucose. However, if the cell completes the entire respiration process (glycolysis - Kreb's - oxidative phosphorylation), about 36 molecules of ATP are created, giving it much more energy to use.
IN CANCER CELL:
Unlike healthy cells that "burn" the entire molecule of sugar to capture a large amount of energy as ATP, cancer cells are wasteful.
Cancer cells only partially break down sugar molecules. They overuse the first step of respiration, glycolysis. They frequently do not complete the second step, oxidative phosphorylation.
This results in only 2 molecules of ATP per each glucose molecule instead of the 36 or so ATPs healthy cells gain. As a result, cancer cells need to use a lot more sugar molecules to get enough energy to survive.
Unlike healthy cells that "burn" the entire molecule of sugar to capture a large amount of energy as ATP, cancer cells are wasteful.
Cancer cells only partially break down sugar molecules. They overuse the first step of respiration, glycolysis. They frequently do not complete the second step, oxidative phosphorylation.
This results in only 2 molecules of ATP per each glucose molecule instead of the 36 or so ATPs healthy cells gain. As a result, cancer cells need to use a lot more sugar molecules to get enough energy to survive.
introduction to WARBERG PHENOMENA:
WARBURG EFFECT Usually, cancer cells are highly glycolytic (glucose addiction) and take up more glucose than do normal cells from outside.
Otto Heinrich Warburg (; 8 October 1883 – 1 August 1970) In 1931 was awarded the Nobel Prize in Physiology for his "discovery of the nature and mode of action of the respiratory enzyme.
WARNBURG EFFECT : cancer cells under aerobic (well-oxygenated) conditions to metabolize glucose to lactate (aerobic glycolysis) is known as the Warburg effect. Warburg made the observation that tumor slices consume glucose and secrete lactate at a higher rate than normal tissues.
Earliest Galaxies in the JADES Origins Field: Luminosity Function and Cosmic ...Sérgio Sacani
We characterize the earliest galaxy population in the JADES Origins Field (JOF), the deepest
imaging field observed with JWST. We make use of the ancillary Hubble optical images (5 filters
spanning 0.4−0.9µm) and novel JWST images with 14 filters spanning 0.8−5µm, including 7 mediumband filters, and reaching total exposure times of up to 46 hours per filter. We combine all our data
at > 2.3µm to construct an ultradeep image, reaching as deep as ≈ 31.4 AB mag in the stack and
30.3-31.0 AB mag (5σ, r = 0.1” circular aperture) in individual filters. We measure photometric
redshifts and use robust selection criteria to identify a sample of eight galaxy candidates at redshifts
z = 11.5 − 15. These objects show compact half-light radii of R1/2 ∼ 50 − 200pc, stellar masses of
M⋆ ∼ 107−108M⊙, and star-formation rates of SFR ∼ 0.1−1 M⊙ yr−1
. Our search finds no candidates
at 15 < z < 20, placing upper limits at these redshifts. We develop a forward modeling approach to
infer the properties of the evolving luminosity function without binning in redshift or luminosity that
marginalizes over the photometric redshift uncertainty of our candidate galaxies and incorporates the
impact of non-detections. We find a z = 12 luminosity function in good agreement with prior results,
and that the luminosity function normalization and UV luminosity density decline by a factor of ∼ 2.5
from z = 12 to z = 14. We discuss the possible implications of our results in the context of theoretical
models for evolution of the dark matter halo mass function.
Professional air quality monitoring systems provide immediate, on-site data for analysis, compliance, and decision-making.
Monitor common gases, weather parameters, particulates.
The effect of salicylic acid and potassium sulphate on safflower (Carthamus tinctorius) yield under the water stress
1. Article Citation:
Afsoon Tayebi, Farhad Farahvash, Bahram Mirshekari, Mehrdad Yarnia and
Alireza Tari-nejad
The effect of salicylic acid and potassium sulphate on safflower (Carthamus tinctorius)
yield under the water stress
Journal of Research in Biology (2016) 6(8): 2149-2157
JournalofResearchinBiology
The effect of salicylic acid and potassium sulphate on safflower (Carthamus
tinctorius) yield under the water stress
Keywords:
Carthamus tinctorius, salicylic acid, potassium, drought
ABSTRACT:
Physiological stress indicates the environmental pressures which affect the
plant physiology and change it. The experiment was conducted as split plot in
randomized complete block design with three replications on safflower (Carthamus
tinctorius) from 2015 to 2016. Treatments were: 1) Irrigation: without stress (irrigation
after 70 mm evaporation from evaporation pan class A) and drought stress (irrigation
after 150 mm evaporation from pan class A) was considered as the main factor and
the concentration of salicylic acid with three levels (0.100 and 200 mg L-1
) as the first
sub-factor. The second sub-factor includes the concentrations of three levels of
potassium sulphate (0.05 and 1 mg L-1
). The interaction between drought stress and
potassium sulphate and also potassium sulphate and salicylic acid were significant on
the induction of plant height. With regard to this, the comparison between salicylic
acid and potassium sulphate interaction on the safflower plant height and the highest
plant height (107.3 cm) was obtained by using 200 mg salicylic acid plus 1 mg L-1
of
potassium sulphate. The combined analysis of data indicated that interaction between
potassium sulphate × salicylic acid on the grain yield was significant. The highest grain
yield (1550 kg ha-1
) belonged to the foliar application of 100 mg salicylic acid and 0.5
mg L-1
of potassium sulphate interaction. The interaction of salicylic acid and
potassium sulphate was significant on the biological yield, and the highest biological
yield was obtained with 200 mg L-1
of salicylic acid and 0.5 mg L-1
of potassium
sulphate. Therefore, in order to compensate for some of the harmful effects of stress
and enable the plant to return to normal growing conditions after re-watering, foliar
application of such chemical compounds on plant can be effective and plays an
important role on the resistance of plant to drought.
2149-2157| JRB | 2016 | Vol 6 | No 8
This article is governed by the Creative Commons Attribution License (http://creativecommons.org/
licenses/by/4.0), which gives permission for unrestricted use, non-commercial, distribution and
reproduction in all medium, provided the original work is properly cited.
www.jresearchbiology.com
Journal of Research in Biology
An International
Scientific Research Journal
Authors:
Afsoon Tayebi1
,
Farhad Farahvash2
,
Bahram Mirshekari2
,
Mehrdad Yarnia2
and
Alireza Tari-nejad3
Institution:
1. Agronomy, Tabriz
Branch, Islamic Azad
University, Tabriz, Iran.
2. Department of Agronomy
and Plant Breeding, Tabriz
Branch, Islamic Azad
University, Tabriz, Iran.
3. Department of
Agricultural Biotechnology,
Azarbaijan Shahid Madani
University, Tabriz, Iran.
Corresponding author:
Farhad Farahvash
Email Id:
Web Address:
http://jresearchbiology.com/
documents/RA0634.pdf
Dates:
Received: 21 Aug 2016 Accepted: 25 Oct 2016 Published: 18 Dec 2016
Original Research
Journal of Research in Biology
An International Scientific Research Journal
ISSN No: Print: 2231 –6280; Online: 2231- 6299
2. INTRODUCTION
Stress is the exposure of an organism to an
intensity of environmental factor which causes apparent
loss in its efficiency or value. Physiological stress
indicates the environmental pressures which affect the
plant physiology and change it. The reduction in
performance is affected by genotype, severity of water
shortages, and the plant growth stage. Among the
oilseeds adapted to Iran’s situation, being a drought and
salinity-resistant plant (Bassil and Kaffka, 2002) and by
having spring and autumn species, Carthamus tinctorius
has a promising future. In vegetative stage, drought
stress reduces the production of dry matter and plant
performance by reducing the leaf area index.
In growth stage, safflower is more tolerant to
water scarcity rather than the subsequent stages, and
absence of irrigation at this stage helps to develop the
plant root system and increases the resistance to hot and
dry conditions in the next stage. It is therefore
recommended that after safflower germination and
establishment, it should be exposed to a short dry period
(Khajehpour, 2006). Proper nutrition under stress
condition can help the plant somewhat to tolerate
different stresses. Potassium is one of the main
macronutrients that its effect is proven on
photosynthesis, also tolerant against environmental
stresses and enhancing irrigation efficiency (Fageria,
2002). Fugger and Malakouti (2000) stated that
potassium in addition to increasing production and
improving the quality of product, causes increase in plant
tolerance to salinity, drought, different types of stress,
pests and diseases, and will increase the efficiency of
water and nutrient usage.
Salicylic acid or benzoic ortho-hydroxy is a
phenolic compound that is found in the nature and is
abundant in numerous plant tissues (Hayat and Ahmad,
2007). Currently, this combination is considered as a
hormone-like substance that plays a vital role in the
growth and development of the plants (Kang et al.,
2003). In most studies, the most important action of
salicylic acid is stated as response and resistance to some
stresses such as drought and salinity (El-Tayeb, 2005;
Noreen and Ashraf, 2008). A variety of salicylic acid
physiological and biochemical effects on the plant
systems are observed which include ion absorption,
seeds germination, membrane permeability,
mitochondrial respiration, stomata closure, material
handling, growth and photosynthesis rate (Senaratna,
2003).
Safflower has very diverse figures that are
different in terms of flower color, plant height, leaf
shape, stem shape, being acanaceous, oil content, fatty
acid composition, duration of growing season, grain
weight and other characteristics. Mousavifar et al. (2009)
by studying the effect of shortage of irrigation at the
reproductive growth stages in spring safflower, found
that there is a significant difference between the three
local variety of Isfahan, Isfahan 28 and IL111, in terms
of seeds number and different classification.
Furthermore, by increasing the duration of irrigation,
seeds number decreased in all three varieties. Reduction
in the seeds number could be due to the impact of water
shortage on the flowers pollination and abortion
(Bradford, 1993). According to the safflower cultivation
new programs, only little information is available
regarding new varieties of safflower response to
environmental stress in the country.
This study is aimed at investigating the response
of safflower to drought stress, as well as finding a
method that could produce the highest yield with less
water thereby resulting in lower production costs.
Hypotheses
Application of salicylic acid causes to resistance to
drought.
Application of potassium sulphate causes to
resistance to drought.
Drought has various effects on the safflower yield.
Tayebi et al., 2017
2150 Journal of Research in Biology (2016) 6(8): 2149-2157
3. MATERIALS AND METHODS
This experiment was conducted in 2015 and
2016 at the Agricultural Faculty of Tabriz Islamic Azad
University (38o
7’ E, 46o
20’ N, and 1361 m). This
experiment was conducted as split plot in randomized
complete block design with three replications on
safflower (cv. safe). Irrigation with two levels: without
stress (irrigation after 70 mm evaporation from
evaporation pan class A) drought stress (irrigation after
150 mm evaporation from pan class A) and is considered
as the main factor and the concentration of salicylic acid
with three levels (zero, 100 and 200 mg L-1
) as the first
sub-factor. The second sub-factor includes the
concentrations of three levels of potassium sulphate (0.
0.5 and 1 mg per liter).
Each experimental unit (plot) with a length of
3 m comprises five rows, by 50 cm row spacing and 10
cm seeds row spacing. Irrigation of farm was done for
water drought treatment (in the 7-8 leaf stage) in the
same manner and every seven days for all plots and then
drought stress is applied based on evaporation pan.
Salicylic acid and foliar application of potassium
sulphate was done in the 7-8 leaf stage and a week prior
to the drought stress.
At harvest time, the five plants in each
experimental plot were selected randomly by considering
the marginal effects, and the traits such as plant height,
number of secondary branches, number of heads per
plant, number of seeds per head and thousand seeds
weight were measured and recorded. The plants in the
area of 4 m2
per plot were selected separately to
determine the yield and after separation of the seeds,
seeds weight and yield were calculated by precision scale
in kilograms per hectare.
In this study, SAS (2002) software and Excel
software (2016) were employed for data analysis and
drawing of diagram, respectively. Mean comparisons
were carried out using LSD at 5% level.
RESULTS AND DISCUSSION
Plant height
Results revealed that the year and drought stress
interaction were significant on the safflower plant height
which shows that the growth of safflower varied under
drought stress conditions in different years. Comparing
the height average in 2015 and 2016 and various stresses
demonstrated that in both years, plant height was reduced
by increasing drought stress, but this reduction was
33.69% in the first year and 13.13% in the second year,
respectively (Table 1). Salem and colleagues (2014) also
observed that water stress reduced plant height
considerably. Although the growth phenomenon is the
result of vital activity in a condition that the plant should
have sufficient water, if there is lack of water supply, the
height will decrease owing to the reduced turgor pressure
in growing cells and its impact on the cells (Munns and
Tester, 2008). The interaction between drought stress and
potassium sulphate and also potassium sulphate and
salicylic acid was significant on plant height.
Comparison between the average plant height influenced
Journal of Research in Biology (2016) 6(8): 2149-2157 2151
Tayebi et al., 2017
Year
Drought stress
(evaporation
mm)
plant height
(cm)
Head number
in plant
Number of
secondary
branches
Number
of seeds in
plant
Biological yield
(kg ha-1
)
S. No
2015
70 a
127.8 a
47.40 a
45.51 a
3559 b
30.62
1
140 c
84.74 b
16.70 b
14.56 b
1179 d
19.92
2016
70 b
101.6 b
22.60 b
18.60 b
1835 a
44.84
2
140 c
88.26 b
21.89 b
16.41 b
1816 c
23.41
Table 1. Comparison of safflower traits influenced by the year and drought stress interaction in the combined
biennial analysis
Means with different letters in a column are statistically significant (LSD test; p £ 0.05).
4. by drought stress treatments and potassium sulphate
showed that drought stress treatment based on 70 mm
evaporation and the use of 0.5 mg per liter of potassium
sulphate causes 6.28% increase in plant height rather
than lack of it.
The use of 1 mg per liter of potassium sulphate
reduced plant height compared to the control, which of
course was not statistically significant. In drought stress
treatment based on 140 mm evaporation, different levels
of potassium sulphate did not cause significant changes
in this trait (Table 3). As regards the comparison
between salicylic acid and potassium sulphate interaction
on the safflower plant height, the highest plant height
(107.3 cm) was obtained in the treatment by using 200
mg salicylic acid plus 1 mg per liter of potassium
sulphate, and the lowest (93.81 cm) for the treatment by
not using salicylic acid and 1 mg per liter of potassium
sulphate, which statistically was not significantly
different from the control (no foliar application of
salicylic acid and potassium sulphate), (Table 4). One of
the reasons for the improvement in plant growth which is
influenced by salicylic acid treatment is the effect of
salicylic acid on the plant mineral nutrition which has
been mentioned in diverse studies (El-Tayeb, 2005;
Khan et al., 2003). Gunes et al. (2005) reported that
salicylic acid causes increase in cations, including
potassium in corn in various stresses.
Number of secondary branches
The number of secondary branches trait in the
plant, plays a key role in terms of the number of head
formation per plant, number of seeds per head and seed
yield. According to the results of the analysis, the
drought and the number of secondary branches
interaction was significant in the plant. The number of
secondary branches in the first year (2015) and in
drought stress treatment was higher than the other
treatments based on 70 mm evaporation. Mean
comparisons of the year × drought stress interaction
indicated that the increased drought led to reduction in
the number of branches in plant, in a way that its amount
in the drought stress in the first year based on 140 mm
evaporation compared with the control group, decreased
by 68% in the first year and 11.77% in the second year,
in which this reduction in the second year was not
statistically significant (Table 1). Under increasing
irrigation intervals, the initial cells number reduces to
produce primary branches stems and consequently, leads
to secondary branches reduction per plant (Cox and
Jollif, 1984). The water and salicylic acid stress
interaction was significant on the number of secondary
branches. The numbers of secondary branches were
different from 38.14 in the stress level, 70 mm
evaporation and 100 mg L-1
to 12.51 in drought stress,
140 mm evaporation and 100 mg L-1
(Table 2).
Tayebi et al., 2017
2152 Journal of Research in Biology (2016) 6(8): 2149-2157
Drought stress
(evaporation mm)
salicylic acid
(mg L-1
)
Head number
in plant
Number of
secondary
branches
Number of
seeds in plant
grain yield
(Kg per
hectare)
S. No
70
0 b
28.31 b
68.28 bc
2260 b
1324
1 100 a
24.45 a
14.38 a
3490 a
1779
200 b
54.28 b
06.26 b
2340 bc
1174
140
0 d
16.18 cd
19.18 d
1329 cd
2.921
2 100 d
72.15 d
51.12 d
1136 d
1.721
200 c
99.23 c
04.19 c
2026 bc
1206
Table 2. Comparison of safflower traits influenced by drought stress and salicylic acid interaction in the
combined biennial analysis
In each column, the means having at least one letter in common have no significant difference based on LSD test at
5% p-value
5. Head number in plant
The head number per plant is affected by drought
stress × year interaction and the heads maximum number
per plant (47.40) was obtained in the first year and
drought stress based on 70 mm evaporation respectively.
Head number in plant was not significantly different in
the second year and in diverse stress tests (Table 1). The
heads numbers per plant are significantly affected by two
factors: drought and concentration of salicylic acid
(Table 2), so that the greatest number of heads per plant
is observed with an average of 45.24 under 70 mm
evaporation and 100 mg of salicylic acid per liter.
Furthermore, the heads minimum number per
plant belonged to drought stress based on 140 mm
evaporation and 100 mg L-1
of salicylic acid by the
average of 15.72. In drought stress, based on 140 mg
evaporation, consumption of 200 mg salicylic acid
compared with 100 mg of salicylic acid increased the
number of heads per plant by 52.60%, but drought
treatment on 70 mm evaporation by consuming the same
amount of salicylic acid decreased the number of heads
per plant by 58.51%, respectively.
According to the average levels of potassium
sulphate foliar application Table at any level of salicylic-
acid (Table 4), in the absence of salicylic acid, the
highest number per plant belonged to foliar application
of potassium sulphate at the rate of 30.37 with 1 mg per
liter concentration, and the lowest number belonged to
foliar application of potassium sulphate at the rate of
21.27 with a concentration of 0.5 mg per liter. In foliar
application of salicylic acid with a concentration of 100
milligrams per liter, the highest number per plant
belonged to the foliar application of potassium sulphate
at the rate of 26.95 with a concentration of 1 mg per liter,
and the lowest number belonged to the absence of foliar
application of potassium sulphate with the rate of 20.88
respectively. Thus, there was no significant difference
with 0.5 milligrams per liter of potassium sulphate. In
foliar application of salicylic acid at a concentration of
200 milligrams per liter, the highest head number per
plant was observed with the rate of 29.75 in the absence
of foliar application of potassium sulphate.
Grain yield
According to the average levels of salicylic acid
foliar application Table at any level of drought stress
(Table 2), the highest grain yield was obtained as 1779
kg per hectare in drought stress based on 70 mm
evaporation and salicylic acid foliar application of 100
mg per liter. Moreover, the lowest yield (721.1 kg ha-1
)
was obtained under drought stress based on 140 mm
evaporation and salicylic acid foliar application of 100
mg, in which it was not significant compared with the
absence of foliar application on the same stress level.
Journal of Research in Biology (2016) 6(8): 2149-2157 2153
Tayebi et al., 2017
Drought stress
(evaporation mm)
Potassium sulphate
(mg L-1
)
Plant height
(cm)
Biological yield
(kg per hectare)
S. No
70
0 b
0.113 a
85.38
1
5.0 a
1.120 a
80.37
1 b
9.110 a
50.36
0 c
99.85 c
10.18
1402
5.0 c
83.84 b
30.26
1 c
68.88 c
50.20
Table 3. Comparison of safflower traits influenced by drought stress and potassium sulphate interaction in the
combined biennial analysis
In each column, the means having at least one letter in common have no significant difference based on LSD test at
5% p-value
6. In irrigation treatment based on 140 mm evaporation, the
difference between the lowest yield was in the treatment
of salicylic acid foliar application of 100 mg per liter,
and the highest yield was in the foliar application of 200
milligrams per liter as 484.9 kg ha-1
, respectively which
indicated an increase of 67.24% in the grain yield,
whereas the difference between the lowest and highest
yield was based on 70 mm evaporation resulting from
different levels of salicylic acid in the stress treatment as
455 k/ha in which the rate showed the increase of
34.36% in grain yield influenced by these treatments
interactions (Table 2).
The combined analysis of data indicated that
interaction between potassium sulphate × salicylic acid
on the grain yield was significant. The highest grain
yield (1550) belonged to the foliar application of 100 mg
L-1
salicylic acid and 0.5 mg L-1
of potassium sulphate
interaction. Also, the lowest grain yield (925.1 kg ha-1
)
belonged to the foliar application of salicylic acid at the
same level and 1 mg L-1
of potassium sulphate,
respectively (Table 4).
Salicylic acid has a positive effect on
photosynthesis and plants growth under stress conditions.
It appears that salicylic acid causes a significant increase
in yield and its components by regulating physiological
and biochemical processes in the face of biotic and
abiotic stresses during the plant life (Ghoraba and
Farahbakhsh, 2014).
Moreover, numerous reports showed the positive
effect of potassium on grain yield in different plants and
under drought stress (Reza et al., 2014; Valadabadi and
Farahani, 2010). Given the important role of potassium
in increasing the rate of photosynthesis, absorption of
carbon dioxide and facilitating the carbon transfer
process from resources to the tanks, it resulted in an
increase in the grain yield. Potassium plays a vital role
in the processes related to the enzymes activity,
photosynthesis, transformation of sugars, protein
synthesis, starch, establishment of plants under drought
stress, by setting up speed and opening and closing of
stomata, improving resistance to lodging and pests and
diseases attacks that in this way has a direct effect on the
yield per plant (Jiang et al., 2011).
Biological yield
But the comparison of the year × drought
interaction (Table 1) shows that the total amount of
biomass between treatments in the second year (2016)
was higher than in the first year (2015), and its maximum
value (44.84 kg/ha) based on 70 mm evaporation
belonged to the second year and the drought stress,
Tayebi et al., 2017
2154 Journal of Research in Biology (2016) 6(8): 2149-2157
Salicylic
acid
(mg L-1
)
Potassium
sulphate
(mg L-1
)
Plant
height
(cm)
Head
number
in plant
Secondary
branches
number
Seed
number
in plant
Seed yield
(kg per
hectare)
Biological yield
(kg per hectare)
S. No
0
0 cd
23.97 bc
45.27 bc
06.23 d
1713 c
9.985 bc
50.29
1 5.0 ab
9.104 e
27.21 bc
65.22 d
1509 c
4.992 c
70.27
1 d
81.93 a
37.39 abc
61.24 bc
2162 ab
1389 ab
70.33
100
0 c
63.99 e
88.20 ab
39.29 b
2246 abc
1273 bc
50.29
2 5.0 cd
21.97 e
09.22 a
28.31 a
3195 a
1550 bc
30.31
1 cd
42.98 bcd
95.26 d
30.15 d
1499 925.1c d
10.20
200
0 bc
7.101 b
75.29 cd
01.19 cd
1836 bc
1132 c
50.26
3 5.0 ab
3.105 de
65.22 bc
21.24 b
2272 bc
1142 a
10.37
1 a
3.107 cde
61.24 abc
41.24 b
2441 abc
1293 abc
90.31
Table 4. Comparison of safflower traits influenced by salicylic acid and potassium sulphate interaction in the
combined biennial analysis
In each column, the means having at least one letter in common have no significant difference based on LSD test at
5% p-value
7. respectively.
Results revealed that the stress and potassium
sulphate interaction was significant on the biological
yield. According to the mean comparisons, drought stress
causes reduction in biological yield compared to the 70
mm evaporation, but the use of potassium sulphate
reduced the negative impact of stress on biological yield
significantly, although the increased rate owing to the
usage of potassium sulphate in the stress levels of 140
mm evaporation did not result in biological yield as the
control level without potassium sulphate (Table 3). The
interaction of salicylic acid and potassium sulphate was
significant on the biological yield, and the highest
biological yield was obtained with 200 mg per liter of
salicylic acid and 0.5 mg L-1
of potassium sulphate,
respectively. The lowest amount of this trait is related to
the treatment of 100 mg of acetylsalicylic acid and 1 mg
of potassium sulphate (Table 4).
During drought stress, plants close their stomata
thereby reducing the amount of carbonation and
photosynthesis. Furthermore, it causes reduction in the
cell turgor and prevents the cell division in which these
factors cause reduced plant growth and biological yield
(Malakouti et al., 2008). Lack of soil moisture leads to
reduction in nutrient delivery to the plant's root level
which prevents adequate nutrients absorption by them, so
that the plants will suffer lack of water along with food.
It is possible to improve nutrient uptake by using
salicylic acid under drought conditions, which in turn
would increase the growth and the biological yield
(Ghoraba and Farahbakhsh, 2014).
Also, potassium sulphate in this study had a
significant effect on biological yield. The effect of
potassium on growth is due to the fact that the element
plays an important role in hydrocarbons production in
plants, and potassium deficiency in plants is associated
with reduced photosynthesis and increased plant
respiration. Hydrocarbon reduction in plant reduces the
accumulation of dry matter owing to changes in
photosynthesis and respiration.
CONCLUSION
In general, the results revealed that the highest
yield and its components were achieved by favorable
irrigation. Although foliar application by salicylic acid
causes increase in most growth indices and consequently
increases the yield in non-stress conditions, but does not
have any significant effect on grain yield in drought
stress conditions. Therefore, in drought stress conditions,
it will be impossible to reduce the negative effects of
stress on grain yield through the application of salicylic
acid but the use of small amount of salicylic acid (100
mg per liter) can somewhat increase the devastating
effects of drought on plant growth. In contrast, high
potassium levels can be used as a mineral osmolyte in
the osmotic regulation under severe conditions and can
have the higher share rather than organic osmolytes.
Therefore, in order to compensate for some of the
harmful effects of stress and enable the plant to return to
normal growing conditions after re-watering, foliar
application of such chemical compounds on plant can be
effective and plays an important role on the resistance of
plant to drought.
REFERENCES
Bassil ES and SR Kaffka. (2002). Response of
safflower (Carthamus tinctorius L) to saline soil and
irrigation: I. Consumptive water use. Agricultural Water
Management, 54(1): 67-80.
Bradford KJ. (1993). Water stress and water relations
of seed development: A critical review. Journal of Crop
Science, 34(1):1-11.
Cox WJ and Jollif GD. (1984). Growth and yield of
sunflower and soybean under soil water deficits.
American Society of Agronomy, 78(2): 266-230.
El-Tayeb MA. (2005). Response of barley grain to the
Journal of Research in Biology (2016) 6(8): 2149-2157 2155
Tayebi et al., 2017
8. interactive effect of salinity and salicylic acid. Plant
Growth Regulation, 45(3): 215-225.
Fageria NK. (2002). Micronutrients influence on root
growth of upland rice common bean, corn, wheat and
soybean. Journal Plant Nutrition, 25(3): 613-622.
Fugger ZK and Malakouti MJ. (2000). Optimum
effects of fertilizer on increasing the tomato yield,
Agricultural education publication in Tehran, first
printing, 40 p.
Gunes A, Inal A, Alpaslan M, Cicek N, Guneri E,
Eraslan F and Guzelorda T. (2005). Effects of
exogenously applied salicylic acid on the induction of
multiple stress tolerance and mineral nutrition in maize
(Zea mays L.). Journal Archives of Agronomy and Soil
Science, 51(6): 687-695.
Hayat S and Ahmad A. (2007). Salicylic acid a plant
hormone. Springer Netherlands. 370 p.
Jiang CC, Xia Y, Chen F, Lu JW and Wang YH.
(2011). Plant growth, yield components, economic
responses, and soil indigenous K uptake of two cotton
genotypes with different K-efficiencies. Agricultural
Sciences in China, 10(5): 705-713.
Kang GC, Wang G. Sun and Wang Z. (2003).
Salicylic acid changes activities of H2O2 metabolizing
enzymes and increases the chilling tolerance of banana
seedlings. Environmental and Experimental Botany, 50
(1): 9-15.
Khajehpour MR. (2006). Industrial plants. Esfahan
University Jihad Press, 564 p.
Khan W, Prithiviraj B and Smith D. (2003).
Photosynthetic response of corn and soybean to foliar
application of salicylates. Journal of Plant Physiology,
160(5): 485-492.
Malakouti MJ, Keshavarz P and Karimiyan NA.
(2008). A comprehensive approach to diagnosis and
proper use of fertilizers for sustainable agriculture.
Tarbiat Modarres University publications, Tehran, 718 p.
Mousavifar B, Behdani MA, Jami al-Ahmadi and
Hosseini Bajad MS. (2009). Effect of lack of irrigation
in reproductive growth stages in yield, its components
and three varieties of safflower oil. Journal of
Agricultural Ecology, 41: 51-1.
Munns R and Tester M. (2008). Mechanisms of salinity
tolerance. Annual Review of Plant Biology, 59: 651-681.
Noreen S and Ashraf M. (2008). Alleviation of adverse
effects of salt stress on sunflower (Helianthus annuus L.)
by exogenous application of salicylic acid: growth and
photosynthesis. Pakistan Journal of Botany, 40(4): 1657-
1663.
Raza MAS, Saleem MF, Shah GM, Khan IH and
Raza A. (2014). Exogenous application of
glycinebetaine and potassium for improving water
relations and grain yield of wheat under drought. Journal
of Soil Science and Plant Nutrition, 14(2): 348-364
Salarpoor Ghoraba F and Farahbakhsh H. (2014).
The effect of drought stress and salicylic acid on
morphological and physiological traits of (Foeniculum
vulgare Mill.), Journal of Crops Improvement, 16(3):
778-765.
Salem N, Msaada K, Dhifi W, Sriti J, Mejri H,
Limam F and Marzouk B. (2014). Effect of drought on
safflower natural dyes and their biological activities,
EXCLI Journal, 13: 1-18.
Senaratna T. (2003). Acetyl salicylic acid (aspirin) and
salicylic acid induce multiple stress tolerance in bean and
tomato plants. Plant Growth Regulation, 30(2): 157-161.
Valadabadi S and Farahani HA. (2010). Studying the
interactive effect of potassium application and individual
field crops on root penetration under drought condition.
Tayebi et al., 2017
2156 Journal of Research in Biology (2016) 6(8): 2149-2157
9. Journal of Agricultural Biotechnology and Sustainable
Development, 2(5):82-86.
Statistical Analysis System. (2002). Users guide
statistics, Version 6th
ed, SAS institute Inc. Cary. North
Carolina, USA.
Excel Computer Picture. (2016). Microsoft Excel Pivot
Tables for Business - Udemy. Udemy. N.p., n.d. Web. 29
Nov. 2016.
Tayebi et al., 2017
Journal of Research in Biology (2016) 6(8): 2149-2157 2157
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