1) The document discusses establishing a co-culture system of the plant Rumex gmelini Turcz (RGT) and its endophytic fungi to improve production of bioactive secondary metabolites.
2) Three endophytic fungi - Aspergillus sp., Fusarium sp., and Ramularia sp. - were isolated from RGT and found to help accumulation of metabolites when co-cultured. Aspergillus sp. showed the most significant enhancement of metabolite yields in RGT.
3) Optimization found the best yields when RGT seedlings were inoculated with Aspergillus sp. spores at a concentration of 1x10^4 mL^-1
Pathogenesis-related proteins (initially named “b” proteins) were discovered in tobacco leaves
hypersensitively reacting to TMV by two independently working groups (Van Loon and Van Kammen,
1970; Gianinazzi et al., 1970)
Mechanism of insect resistance in plants (non preference, antibiosis, tolerance and avoidance) – nature of insect resistance – genetics of insect resistance – horizontal and vertical – genetics of resistance – sources of insect resistance – breeding methods for insect resistance – problems in breeding for insect resistance – achievements.
International Journal of Pharmaceutical Science Invention (IJPSI) is an international journal intended for professionals and researchers in all fields of Pahrmaceutical Science. IJPSI publishes research articles and reviews within the whole field Pharmacy and Pharmaceutical Science, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
Pathogenesis-related proteins (initially named “b” proteins) were discovered in tobacco leaves
hypersensitively reacting to TMV by two independently working groups (Van Loon and Van Kammen,
1970; Gianinazzi et al., 1970)
Mechanism of insect resistance in plants (non preference, antibiosis, tolerance and avoidance) – nature of insect resistance – genetics of insect resistance – horizontal and vertical – genetics of resistance – sources of insect resistance – breeding methods for insect resistance – problems in breeding for insect resistance – achievements.
International Journal of Pharmaceutical Science Invention (IJPSI) is an international journal intended for professionals and researchers in all fields of Pahrmaceutical Science. IJPSI publishes research articles and reviews within the whole field Pharmacy and Pharmaceutical Science, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
PREFERENTIAL ASSOCIATION OF ENDOPHYTIC BRADYRHIZOBIA WITH DIFFERENT RICE CULT...Anamika Rana
All of rice oligotrophic endophytic Bradyrhizobia in this study were obtained except SUT-R74.
6 Bradyrhizobial strains were obtained from 98 bacterial strains.
Bradyrhizobium is found only in rice root, with 10% relative abundance of total Alphaproteobacteria.
Endophytic Bradyrhizobia could not be obtained from the monoculture system.
Thai rice cultivars, the Thai Bradyrhizobial strains could promote rice growth better than Japanese strains.
Three rice cultivars (Pathum Thani 1, Kasalath, and Nipponbare), cultivar Pathum Thani 1 responded only to putative Thai rice endophytic Bradyrhizobia.
This phenomenon was not found in Japanese rice cultivars.
Non-PB strains are also capable of forming a natural endophytic association with rice.
Strains SUT-PR9, WD16, RP5, and RP7 displayed non-PB phenotypes but were genotypically close to PB strains.
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International Journal of Engineering Research and Applications (IJERA) aims to cover the latest outstanding developments in the field of all Engineering Technologies & science.
International Journal of Engineering Research and Applications (IJERA) is a team of researchers not publication services or private publications running the journals for monetary benefits, we are association of scientists and academia who focus only on supporting authors who want to publish their work. The articles published in our journal can be accessed online, all the articles will be archived for real time access.
Our journal system primarily aims to bring out the research talent and the works done by sciaentists, academia, engineers, practitioners, scholars, post graduate students of engineering and science. This journal aims to cover the scientific research in a broader sense and not publishing a niche area of research facilitating researchers from various verticals to publish their papers. It is also aimed to provide a platform for the researchers to publish in a shorter of time, enabling them to continue further All articles published are freely available to scientific researchers in the Government agencies,educators and the general public. We are taking serious efforts to promote our journal across the globe in various ways, we are sure that our journal will act as a scientific platform for all researchers to publish their works online.
Grafting is a method employed to improve crop production. Grafting of vegetable seedlings is a unique horticultural technology practiced for many years in East Asia to overcome issues associated with intensive cultivation using limited arable land.The first grafted vegetable seedlings used were for Watermelon (Citrullus lanatus L.) plants grafted onto Lagenaria siceraria L. rootstock to overcome Fusarium wilt. Since then, the use of grafted solanaceous and cucurbitaceous seedlings has spread, with the practice mainly used in Asia, Europe, and North America. The expansion of grafting is likely due to its ability to provide tolerance to biotic stress, such as soilborne pathogens, and to abiotic stresses, such as cold, salinity, drought, and heavy metal toxicity, due to the resistance found in the rootstock. Many aspects related to rootstock/scion interactions are poorly understood, which can cause loss of fruit quality, reduced production, shorter postharvest time, and, most commonly, incompatibility between rootstock and scion. The rootstock and scion cultivars must be chosen with care to avoid loss.
Physiological, Biochemical and Modern Biotechnological Approach to Improvemen...IOSR Journals
Rauwolfia serpentina also known as Sarpagandha (Apocynaceae) is an integral part of Ayurvedic medical system in India for over centuries for the treatment of various ailments. The leaves and roots ofRauwolfiaserpentina contain alkaloids which are secondary metabolites. Major alkaloids identified are Reserpine, Rauwolfine, Serpentine, Sarpagine, Ajmaline, Yohimbine and Ajmalicine.The present paper is an overview of the studies concerning with physiological, biochemical and modern biotechnological approach to improvement of Rauwolfiaserpentina.
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In Vitro Shoot Regeneration and Rooting of Piper Longum L.: A valuable Medici...AnuragSingh1049
Piper longum L (Long pepper), of family Piperaceae, is an important medicinal plant in Sri Lanka. Cultivation of Piper longum L. till recently was not very common and still it is extensively collected from the wild owing to the increasing demand from the pharmaceutical industry, threatening the very existence of the plant. Poor seed viability and low germination, scanty and delayed rooting of vegetative cuttings restrict its propagation through sexual and vegetative propagation methods indicating a need of alternative approaches such as in vitro techniques for large scale propagation of this medicinally important plant. Therefore, this study was conducted to develop an effective in vitro propagation protocol for Long pepper using nodal segments as ex plants, obtained from a shade house grown mature plant. Murashige and Skoog (MS) medium was used throughout the experiment. For shoot proliferation, MS medium supplemented with combination of 1-Naphthalene acetic acid (NAA), Kinetin (KIN) and different levels of N6-benzylaminopurine (BAP) were used. In vitro rooting was achieved to 50% strength MS basal medium containing 1mg/L. The highest frequency of multiple shoot regeneration, that is 87.5% and the maximum number of, 36-40 shoots/ex plants in one sub culture (within 8 weeks after inoculation) were observed in MS media containing BAP (3 mg/L), KIN (0.5mg/L) and NAA (0.2mg/L). The maximum number of roots (6-8 per plantlet) were obtained in 50% MS basal medium + glucose (15 g/L) + Ascorbic acid (100 mg/ L) and gelled with 0.8% (w/v) agar supplemented with NAA (1 mg/L). In vitro rooted shoots were successfully acclimatized in the shade house conditions. Therefore, it is possible to deduce that the current protocol is promising for in vitro mass propagation of Piper longum L. to solve the reproduction and cultivation problem of the plant.
Successful colonization of roots and Plant growth promotion of sorghum (Sorgh...Premier Publishers
Pseudomonas putida (P29) and Azotobacter chroococcum (Azb19) are the efficient promising strains selected from in vitro plant growth promoting studies. These two strains were tested for their ability to promote growth of sorghum and colonize sorghum roots. Seed bacterization with P29 and Azb19 resulted in increased plant height, shoot height, root volume, leaf area and total plant dry mass. Further, bacterial inoculation also significantly increased macro-and micro-nutrient uptake by sorghum plants. Using electroporation method, pure cultures of P29 and Azb19 were transformed with pHC 60 plasmid containing gfp gene. Transformants detected by colony PCR were used to study the colonization pattern on roots of sorghum. Confocal fluorescence scanning microscope (CLSM) was used to locate the inoculants on or inside roots. Root colonization in sorghum by P29 was internal whereas Azb19 was detected on root surface. GFP-tagged Pseudomonas was predominantly detected at the root differentiation zone. In case of Azb19 small aggregates of micro-colonies were observed on the surface of the roots. The efficient sorghum root colonization by these inoculants clearly demonstrated that the introduced strains could successfully inhabit the rhizosphere and thus resulting in increased nutrient uptake. Inoculation with P29 resulted in increased uptake of P (288.5%), K (179.1%), Fe (242.7%), and Zn (168.1%) as compared to Azb19 where the uptake of P, K, Fe, Mn, and Zn increased by 142.6%, 161.6%, 199.5%, and 121.9%, respectively. On the other hand, inoculation with Azb19 could enhance better uptake of N (163.6%) as compared to P29 (133.3%). The strains also differed in their mode of root colonization.
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Key-words- Baytan, Carboxin- thiram, Carbendazim, Gaucho, Larvin
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"Protectable subject matters, Protection in biotechnology, Protection of othe...
Plant tissue culture
1. DEPARTMENT OF LIFE SCIENCES
SRINIVAS S. SURYAVANSHI
MSc 2nd plant sciences
Roll no. – 2019MLS10
2. The improvement of bioactive secondary metabolites accumulation in Rumex gmelini Turcz (RGT) through co-culture
with endophytic fungi
Chang-hong Dinga, Qian-Bo Wangb, Shenglei Guoa, Zhen-yue Wanga
INTRODUCTION
• Endophytic fungi live in various tissues and organs of healthy plant, maintain an association
with their hosts for at least apart of their life cycle without triggering host plant to show
obvious symptoms of infection .
Endophytic fungi
• Endophytic fungi could promote accumulation of bioactive secondary metabolites in their
host plant,
3. • Rumex gmelini Turcz (RGT) belongs to Polygonaceae. In the folk its root and rhizome are used as medicine, which contain
bioactive secondary metabolites .
• Aspergillus sp., Fusarium sp., and Ramularia sp. were endophytic fungi isolated from Rumex gmelini Turcz (RGT),
• such as resveratrol, polydatin, emodin, chrysophanol, chrysophaein, physcion and musizin.
• It has many pharmacological activities, such as anticancer, antifungal, antiasthmatic, antihypertensive, antiviral and antioxidant
effects.
• More than 300 strains of endophytic fungi had been isolated from roots, rhizomes, stems and leaves of RGT, belonging to 3 orders,
4 families, 37 genera.
4. • The results indicated that co-culture with Endophytic fungi could significantly enhance bioactive secondary metabolites production of
RGT seedlings.
• Aspergillus sp. could produce emodin, Fusarium sp. Could produce polydatin, and Ramularia sp. could produce chrysophanol.
• However, these abilities would be degraded after cultured alone for a long time, and were difficult to recover.
• Many studies use different kinds of elicitors to maintain or promote fungal production of bioactive components.
• Water-extracted polysaccharide of its host was found to be the most effective elicitor to enhance diepoxin zeta production of
endophytic fungus Berkleasmium sp.,
5. • 8methyl jasmonate were proven to be an optimum elicitor in view of that camptothecin yield was increased 3.4-fold.
• The co-culture of the suspension cells of Taxus chinensis var. mairei and its endophytic fungi Fusarium mairei was successfully
established for paclitaxel production, and got a productivity 38-fold higher than that by uncoupled culture.
• Cell of Catharanthus roseus (L.) G. Don co-cultured with its endo-phytic fungus could get a 48% higher alkaloid yield than the
control group
6. Results
Establishment of co-culture system of RGT and its endophytic fungi
• RGT seedlings that had taken root for 15 d already had developed root system and in good growth state, respectively inoculated Aspergillus sp., Fusarium sp.
and Ramularia sp. In media of these seedlings.
• First 3 d after inoculation, there was no change either in seedlings nor in media, which showed that endophytic fungi needed a certain adaptation period.
• After co-cultured Fusarium sp. and RGT seedlings for 5 d, there were mycelia blocks in the medium and black spots on root hair. Symbiosis for 7 d, culture
medium became turbid and thick, but no mycelia on the surface of the medium, mean-while new leaves were growing.
• After 10 d, more new leaves appeared, some old leaves became yellow, the roots became stronger, the whole seedlings were in good growth condition.
7. • Ramularia sp. and RGT seedlings were in poor symbiotic state, 7 d after inoculation, mycelia of Ramularia sp .
• Color of medium turned dark and became thick and sticky, root tips of seedlings were black. Co-cultured for 12 d, the edge of new leaves turned yellow, and
were wilted . although new leaves appeared , they were grew slow, most seedlings were in morbid state, the others were died.
• It was found that in the beginning of this symbiosis, Ramularia sp. grew too fast and excessively consumed nutrients of the culture medium , resulting in the
malnutrition of seedlings. In later stage ,seedlings were sick and died, which might because seedlings could not tolerate serious infection of Ramularia sp
• During this process, Ramularia sp. might produced some metabolites that turned the culture medium yellow and sticky, moreover, some of these metabolites
were not conducive to the growth of seedlings.
Establishment of co-culture system of RGT and its endophytic fungi
8. • Co-cultured Aspergillus sp. and RGT seedlings for8 d, only some white suspended mycelia of Aspergillus sp. appeared in
medium without large mycelia blocks, the color of medium did not change significantly, seedlings could continue to grow
with a few white fluffy mycelia covered the surface of their roots. As co-culture continued, new leaves appeared , surface area
of old leaves increased, the whole bright green.
• Tissue culture seedlings were strong without any pathological changes.
Establishment of co-culture system of RGT and its endophytic fungi
9.
10. Effect of co-culture on the yield of bioactive secondary metabolites
Chromatogram of roots and rhizomes of RGT seedlings obtained by HPLC ,The contents of seven chemical
compositions were calculated according to their regression equations.
11. Effect of co-culture on the yield of bioactive secondary metabolites
Different letters indicated significant differences
among the treatments at p = 0.05 level. C: control; A:
RGT seedlings co-culture with Aspergillus sp.; F: RGT
seedlings coculture with Fusarium sp.; R: RGT
seedlings co-culture with Ramularia sp.
• The yield of effective components of the roots and rhizomes of RGT
seedlings that co-cultured with Aspergillus sp. were higher than that
of the control except polydatin, in addition, musizin was detected in
co-cultured seedlings, but not in the control.
• During co-culture process of RGT seedlings and Ramularia sp.,
seedlings showed wilt and sick earlier than the other co cultured
groups, polydatin and musizin were not determined in co-cultured
seedlings, and the yield of other effective com-ponents were low .
12. Different letters indicated significant differences among the
treatments at p = 0.05 level. C: control; A: RGT seedlings co-
culture with Aspergillus sp.; F: RGT seedlings coculture with
Fusarium sp.; R: RGT seedlings co-culture with Ramularia
• Fusarium sp. could significantly improve the yield
of musizin, chrysophanol and physcion ,however its
promotive effect was weaker than Aspergillus sp.
• Hence Aspergillus sp. was considered as the most
effective fungus that could promote bioactive
components accumulation in RGT seedlings.
Effect of co-culture on the yield of bioactive secondary metabolites
13. Optimization of co-culture conditions for RGT seedlings and Aspergillus sp.
• As Aspergillus sp. exhibited an excellent promoting effect on bioactive components accumulation in RGT seedlings,
• Colony’s growth state often changes, in order to better quantify the inoculation amount of fungus, fungal spores were
used to inoculate into media of RGT seedlings.
• Aspergillus sp. spores were respectively inoculated into media of RGT seedlings that had taken root for 10 d (1), 15
d(2), 20 d (3), 25 d (4), and made final concentrations of spores in co-culture media were
1 × 103mL–1(L), 1 × 104mL–1(M),1 × 105mL–1(H).
• The best symbiotic state of the other groups appeared 10 to 15 d after inoculation of Aspergillus sp.
Optimization of co-culture conditions for RGT seedlings and Aspergillus sp.
14. Aspergillus sp. spores were respectively inoculated into media of RGT seedlings that had
taken root for 10 d (1), 15 d(2), 20 d (3), 25 d (4), and made final concentrations of spores
in co-culture media were 1 × 103mL–1(L), 1 × 104mL–1(M),1 × 105mL–1(H). RGT seedlings
10d 15d 20d 25d
15. Optimization of co-culture conditions of RGT seedlings and Aspergillus sp. Different letters
indicated significant differences among the treatments at p = 0.05level. C: control; 1: co-culture
when RGT seedlings had taken root for 10 d; 2: co-culture when RGT seedlings had taken root
for 15 d; 3: co-culture when RGT seedlings had taken root for 20 d; 4: co-culture when RGT
seedlings had taken root for 25 d; L: final concentrations of Aspergillus sp. spores in media was
1 × 103mL–1; M: final concentrations of Aspergillus sp. spores in media was 1 × 104mL–1; H:
final concentrations of Aspergillus sp. spores in media was1 × 105mL−1.
16. • Growth rate of the fungi were much faster than the host, in order to prevent fungi from excessively consuming medium nutrition, the medium should be
always replaced to ensure the nutrients for seedlings .
• It had been reported that musizin had effects of antifungal and antioxidant.
• In co-cultured RGT seedlings musizin had been detected, maybe the plant need to resist exogenous fungus, resulting in the earlier synthesis of musizin.
Polydatin had similar pharmacological effects to resveratrol.
• Former research showed that Aspergillus oryzae could transform polydatin to resveratrol with high yield and mild conditions
• The endophytic fungi of RGT might also have the ability of this biotransformation .
RGT Seedlings and different fungi and their effects
17. • Cultured RGT seedlings, the contents of some kinds of anthraquinones , such as chrysophaein, chrysophanol , physcion and emodin were increased
significantly
• It may be due to symbiosis that promoted the synthesis of anthraquinone compounds, or inhibited the competitive pathway.
• RGT seedlings co-cultured with Ramularia sp. had significantly lower yield of effective components than the control except emodin,
• Mechanism when RGT seedlings were subjected to external microbial infection, plant produced emodin that had the effect of antifungal to resist the
invasion of foreign fungus and pre-vent fungus further spread to other area. Emodin, polydatin and musizin all have antifungal effect .
RGT Seedlings and different fungi and their effects
18. • After co-culture of Ramularia sp. and RGT, there were no polydatin and musizin in seedlings, meanwhile emodin yield increased obviously .
• co-culture conditions for RGT seedlings and Aspergillus sp., low and medium concentration of Aspergillus sp. spores were beneficial to build symbiotic
state of fungus and RGT seedlings.
• After high concentration of Aspergillus sp. spores inoculated in medium, the environment was suitable for rapid growth of this strain .
• It was appropriate to inoculate fungus into RGT seedlings that had taken root for longer time, in that situation, RGT seedlings would become stronger,
and the symbiosis between seedlings.
RGT Seedlings and different fungi and their effects
19. Aspergillus sp., Fusarium sp., and Ramularia sp. were endophytic fungi isolated from Rumex gmelini Turcz (RGT), all of these three strains could produce
some similar bioactive secondary metabolites of their host.
However the ability to produce active components degraded significantly after cultured these fungi alone for a long time, and were difficult to recover . In
order to obtain more bioactive secondary metabolites, the co-culture of tissue culture seedlings of RGT and its endophytic fungi were established respectively,
and RGT seedling was selected as producer. Among these fungi, Aspergillus sp. showed the most significant enhancement on bioactive components
accumulation in RGT seedlings.
When inoculated Aspergillus sp. spores into media of RGT seedlings that had taken root for 20 d, and made spore concentration in co-culture medium was 1
× 104mL–1, after co-cultured for 12 d, the yield of chrysophaein, resveratrol, chrysophanol, emodin and physcion .The extreme value of musizin yield was
0.289 mg , which was not detected in the control groups. The results indicated that co-culture with endophytic fungi could significantly enhance bioactive
secondary metabolites production of RGT seedlings.
SUMMARY
20. Reference:
Biotechnology and Industrial Microbiology The improvement of bioactive secondary metabolites
accumulation in Rumex gmelini Turcz through co-culture with endophytic fungi.
Chang-hong Dinga, Qian-Bo Wangb, Shenglei Guoa, Zhen-yue Wanga,∗