This document describes a study that aimed to identify a fungal strain that can degrade the pesticide chlorpyrifos and optimize the concentration for degradation. The fungal strain was identified as Fusarium sp. based on morphological analysis under a microscope. The strain was grown in media containing different concentrations of chlorpyrifos and it was found to grow best at a 1.2% concentration, demonstrating this is the optimum level for degradation. The study concludes Fusarium sp. has potential for bioremediation of chlorpyrifos contamination.
Introduction
Type of pesticides
Advantage & disadvantages of pesticides
Degradation of pesticide
Microbial degradation of pesticides
Mode of microbial metabolism of pesticides
Strategies for biodegradation
Approaches for biodegradation of pesticide
Chemical reaction leading biodegradation of pesticide
Metabolism of pesticides by MO
Metabolism of DDT
Lignocelluloses, the major component of biomass, makes up about half of the matter produced by photosynthesis. It consists of three types of polymers – cellulose, hemicellulose, and lignin – that are strongly intermeshed and chemically bonded by non-covalent forces and by covalent cross-linkages. A great variety of fungi and bacteria can fragment these macromolecules by using a battery of hydrolytic or oxidative enzymes. In native substrates, binding of the polymers hinders their biodegradation. Molecular genetics of cellulose-, hemicellulose- and lignin-degrading systems advanced considerably during the 1990s. Most of the enzymes have been cloned, sequenced, and expressed both in homologous and in heterologous hosts. Much is known about the structure, genomic organization, and regulation of the genes encoding these proteins.
Introduction
Type of pesticides
Advantage & disadvantages of pesticides
Degradation of pesticide
Microbial degradation of pesticides
Mode of microbial metabolism of pesticides
Strategies for biodegradation
Approaches for biodegradation of pesticide
Chemical reaction leading biodegradation of pesticide
Metabolism of pesticides by MO
Metabolism of DDT
Lignocelluloses, the major component of biomass, makes up about half of the matter produced by photosynthesis. It consists of three types of polymers – cellulose, hemicellulose, and lignin – that are strongly intermeshed and chemically bonded by non-covalent forces and by covalent cross-linkages. A great variety of fungi and bacteria can fragment these macromolecules by using a battery of hydrolytic or oxidative enzymes. In native substrates, binding of the polymers hinders their biodegradation. Molecular genetics of cellulose-, hemicellulose- and lignin-degrading systems advanced considerably during the 1990s. Most of the enzymes have been cloned, sequenced, and expressed both in homologous and in heterologous hosts. Much is known about the structure, genomic organization, and regulation of the genes encoding these proteins.
It is a biofertilizer that contains symbiotic Rhizobium bacteria which is the most important nitrogen-fixing organism. These organisms have the ability to drive atmospheric Nitrogen and provide it to plants. It is recommended for crops such as Groundnut, Soybean, Red-gram, Green-gram, Black-gram, Lentil, Cowpea, Bengal-gram and Fodder legumes, etc.
introduction
What is virus
What is virus resistance plant
History
Gene use for develop virus resistance plant
Coat protein gene
cDNA of satellite RNA
Defective viral genome
Antisense RNA approach and
Ribozyme – mediated protection
conclusion
References
The heart of the fermentation or bioprocess technology is the Fermentor or Bioreactor. A bioreactor is basically a device in which the organisms are cultivated to form the desired products. it is a containment system designed to give right environment for optimal growth and metabolic activity of the organism.
A fermentor usually refers to the containment system for the cultivation of prokaryotic cells, while a bioreactor grows the eukaryotic cells (mammalian, insect cells, etc).
TLC for chlorinated pesticide determination Bapi Mondal Bapi Mondal
In this assignment file i will demonstrate the process involved in Thin layer chromatography for Chlorinated Pesticide
determination. if u like this work feel free to share this file. thank you.
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It is a biofertilizer that contains symbiotic Rhizobium bacteria which is the most important nitrogen-fixing organism. These organisms have the ability to drive atmospheric Nitrogen and provide it to plants. It is recommended for crops such as Groundnut, Soybean, Red-gram, Green-gram, Black-gram, Lentil, Cowpea, Bengal-gram and Fodder legumes, etc.
introduction
What is virus
What is virus resistance plant
History
Gene use for develop virus resistance plant
Coat protein gene
cDNA of satellite RNA
Defective viral genome
Antisense RNA approach and
Ribozyme – mediated protection
conclusion
References
The heart of the fermentation or bioprocess technology is the Fermentor or Bioreactor. A bioreactor is basically a device in which the organisms are cultivated to form the desired products. it is a containment system designed to give right environment for optimal growth and metabolic activity of the organism.
A fermentor usually refers to the containment system for the cultivation of prokaryotic cells, while a bioreactor grows the eukaryotic cells (mammalian, insect cells, etc).
TLC for chlorinated pesticide determination Bapi Mondal Bapi Mondal
In this assignment file i will demonstrate the process involved in Thin layer chromatography for Chlorinated Pesticide
determination. if u like this work feel free to share this file. thank you.
Phytochemical screening and antibacterial properties from extract of Alchorne...Uploadworld
This study involved a survey on the use of extract of Alchornea cordifolia a medicinal plant used locally in Cameroon as traditional medicine for the treatment of infectious diseases.
This presentation is about the Xenobiotic Torent Bacteria in very effective way.
I hope you all will like it,,,
Don't forget to remember me in your precious Dua,,,
This presentation includes the basic knowledge ofXenobiotics with a lot of understandable knowledge and also how to use it properly. I hope all the finders liked it and also remember me in your precious Dua. Thank You!
Fungicides have been
used to reduce mycotoxin contamination in wheat affected by Fusarium head blight, but most
fungicides developed so far have not been sufficiently effective to be useful for managing
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combatting or preventing fungal diseases. Cymoxanil is a foliar fungicide with protective and
curative action. It has Contact and local systemic activity, and it also inhibits sporulation. It can be
used for controlling Peronosporales, especially Peronospora, Phytophthora, Plasmopara and
Fusarium spp. Chlorothalonil is a chloronitrile non-systemic foliar fungicide with protective
action.
Inductive Toxic-Mopping (IT-m) and Carotenogenic Bioconversion Properties of ...iosrjce
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previously identified thermophilic species of photosynthetic bacterium, Rhodocista pekingensis isolated from a
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Pesticide degradation by fungal strain
1. Morphological Identification &
Concentration Optimization of
Pesticide Degrading Fungal
Strain
Minor Project
Under The Supervision of
Dr. Jyoti Saxena
2016-2017
By
Neha Mishra
Jyotsna Mehra
2. Morphological Identification and Concentration
Optimization of Pesticide Degrading Fungal Strain
INTRODUCTION________________3-4
Pesticide_______________________4
Effects of Pesticides______________5
Classification _________________6-7
Bioremediation__________________8
Material and Methods_________9-10
Result and Discussion _________1-14
Conclusion ____________________15
3. Pesticide
• Chemical or biological substance designed to kill or retard the growth of
pests that damage or interfere with the growth of crops, shrubs, trees,
timber and other vegetation desired by humans are called pesticides.
• Goal: to stop or limit pest occurrence
• Benefits: Improve quality and quantity of our food supply.
Used in timber, horticulture, aquatic, and structural pest control industries.
Homeowners and home gardeners often use pesticides in their homes,
yards, and on pets.
• Types:
– Insecticides – kill insects
– Herbicides – kill weeds
– Fungicides – suppress or kill fungi
4. What Happens after Application?
• When applied to the goal they will remain in the target area for long enough
time to control a specific pest.
• Pesticides are mobile in the environment (air, soil, water).
• This movement can be beneficial (moving pesticide to target area, such as
roots) but can also reduce the effect on the target pest and injure non target
plants and animals.
• World wide use of pesticide all over the world is 1 billion tons per year.
• An average of 23 deaths occur each year with pesticide.
• Farmers who use pesticides have a ‘significantly high rate of cancer
incidence’ then non farmers.
6. Classification of Pesticide
1. Carbamates: derived from carbamic acid and
kill insects. Interferes with cholinesterase causes
acute poisoning.
2. Organochlorine: are chlorinated hydrocarbons
I. Used extensively in agriculture and
mosquito control.
II. lead to environmental pollution and
accumulation in mammals, resulting in
cumulative poisoning or damage.
3. Organophosphates (OP): highly toxic, interferes
with an important nervous system enzyme
“cholinesterase”. Large exposures can cause acute
poisoning.
Chlorpyrifos in market
Chemical structure of Chlorpyrifos
7. Chlorpyrifos: A type of organophosphorus pesticide and its chemical name is O,
O-diethyl O- (3, 5, 6-trichloro-2-pyridyl) phosphorothioate.
A widely used insecticide and effective against a broad spectrum of insect
pests of economically important crops.
Also used for the control of mosquitoes (larvae and adults), flies, various
soil pests, many foliar crop pests and household pests.
Classified by the World Health Organization as class II, moderately
hazardous pesticide (WHO, 1997).
Affect the central nervous system, the cardiovascular system, and the
respiratory system. Also a skin and eye irritant.
Skin which has come in contact with this material should be washed
immediately with soap and water and all contaminated clothing should be
removed.
Chlorpyrifos
8. Bioremediation
The degradation of noxious waste from the environment using microorganisms is
called as bioremediation. Microorganisms like bacteria, fungi, algae etc. take part
in bioremediation. Forms of bioremediation are given as bioleaching, bio-venting,
phyto-remediation, land-farming, composting, rhizo-filtration, bio-absorption,
bio-augmentation and myco-remediation.
• Applications of bioremediation
Bioremediation protects us from the use of chemicals and artificial
mechanisms that are to be used for the cleaning processes.
It has no side effects.
Pollution free environment is the result of bioremediation Processes like
incineration requires a lot of energy where as bioremediation is energy
independent process
10. Material and Methods
1. Morphological analysis:
10J the fungal strain was taken from the previously prepared petri
dishes.
Identification of fungus was done by its staining procedure.
Fungal isolates were spread on the glass slide followed by addition of a
drop of lacto phenol stain.
Slide is visualized under microscope at 40 X magnification
The fungus was identified after the morphological analysis
11. The concentration of chlorpyrifos was optimized by growing the identified
fungal isolate at different concentrations of chlorpyrifos viz. 0.3%, 0.6%,
0.9%, 1.2%.
Discs of selected fungal isolates were inoculated into 50 ml of CZM
broth at 6.5 pH, containing different concentrations of chlorpyrifos
Broth was incubated at optimum temperature (28∓2⁰C) for 7 days.
After the respective period, percentage of chlorpyrifos degradation and
growth of fungus (dry mass) was calculated and compared with that of
control
Optimization of concentration for the growth of
Chlorpyrifos tolerant fungal isolates
12. Result and discussion
1. Morphological analysis:
The fungal isolate was characterized by microscopic analysis using lacto phenol cotton
blue staining procedure. Hence it is concluded that the strain is Fusarium sp.
Microscopic image of Fusarium sp.
13. The strains were inoculated in varied concentrations (0.3%,
0.6%, 0.9%, 1.2%) of chlorpyrifos.
Maximum growth was observed at concentration 1.2 % of
Chlorpyrifos at 7 days incubation i.e. 1.040 mg in strain 10J.
Minimum growth was observed at concentration 0.3% i.e. 0.815.
As pesticide concentration was increased a gradual decrease in
growth was observed in both the strains after 7 days of incubation.
Hence, the optimum pesticide concentration was found to be 1.2%
keeping incubation period constant.
Concentration Optimization
14. Table 1 : Dry Mycelial weight with chlorpyrifos concentration variation in
strain 10J after 7 days growth.
SN.
NO.
Chlorpyrifos
(v/v %)
Weight of filter paper
(mg)
Weight of filter paper
with mycelia after
drying
(mg)
Dry mycelial
biomass (mg)
01 0.3% 2.700 3.515 0.815
02 0.6% 2.694 3.720 1.026
04 0.9% 2.611 3.619 1.008
05 1.2% 2.748 3.788 1.040
Control 2.739 3.879 1.140
Dry Mycelial weight with Chlorpyrifos concentration
variation in strain 10J after 7 days growth.
16. The use of chemical pesticides has brought benefits such as the increment
of agricultural production soil productivity.
Only 10% of applied pesticides reach to the target organism,
A high percentage impacts to non-target organism such wild life, besides
affecting public health.
Due to the extensive pesticides use, currently there are polluted sites with
these compounds (mainly soils), so it is necessary to generate strategies for
waste treatment and/or for the bioremediation of polluted sites.
The biological treatment is an important technology from an economical and
environmental point of view.
On the basis of above mentioned results, after the morphological analysis
the strain has been identified as Fusarium sp. and the optimum
concentration for growth as well as Chlorpyrifos degradation for strain
Fusarium sp.is 1.2%.
Conclusion