Essential oils were extracted from different plant species (Acorus calamus, Artemisia nilagerica,... more Essential oils were extracted from different plant species (Acorus calamus, Artemisia nilagerica, Erigeron Canadensis) to evaluate their effect on the growth of four phytopathogenic fungi viz. Alternaria alternata, Botrytis cinerea, Fusarium oxysporum and Penicillium expansum following poisoned food technique method. Different concentration of oil such as 125ppm, 250ppm, 500ppm, 1000ppm and 5000ppm were taken to evaluate the effect. There was 100% inhibition in the growth of phytopathogenic fungi at 5000 and 1000ppm concentration by essential oil of A. calamus. At 500ppm concentration also 100% inhibition was found up to 7th day on F. oxysporum. Essential oil of A. nilagirica inhibits the growth of all phytopathogenic fungi at higher concentration. In case of P. expansum at 5000ppm concentration 100% inhibition was recorded even after 15 days of incubation. The decrease in colony diameter or growth of fungus was corresponding to the concentration of oil. In comparison to others two,...
A study on ectomycorrhizae and mycorrhizal fungi of Pinus kesiya (Royle ex Gordon) in 2-, 4-, 11-... more A study on ectomycorrhizae and mycorrhizal fungi of Pinus kesiya (Royle ex Gordon) in 2-, 4-, 11-, and 17-year-old pine plantations was carried out. Thirteen mycorrhizal fungi forming ectomycorrhiza with khasi pine were observed. Diversity index of mycorrhizal fungi was directly proportional to the age of the pine stand. The maximum number of fungal species was observed in the oldest stand. Evenness of the sheathing mycorrhizal fungi was also increased with the increase in age of pine. The sporocarps of Boletus luteus, Scleroderma aurantium, Tricholoma saponaceum, and Hygrophorus limacinus were observed as an early colonizing fungi with Pinus kesiya. However, in older plantations Russula lepida and Amanita phalloides were observed as late stage fungi. Boletus luteus and Scleroderma aurantium were dominant species in all the pine stands. Sporocarps of mycorrhizal fungi were maximum during the rainy season and minimum during the winter months. A positive correlation was observed betwe...
A total of 52 fungal species were isolated from forest foil. Phoma leveillei was recorded through... more A total of 52 fungal species were isolated from forest foil. Phoma leveillei was recorded throughout the study period. Fungal species Acremonium butyric, Aspergillus niger, Aurobasidium pullulans, Cladorrhinum foecundissimum, Cunningmella elegans, Geotrichum sp., Humicola fuscoatra, Humicola grisea, Paecilomyces farinosus, Torula herbarum were dominant and found commonly during the study period.
... IMD 2679. Appl Microbiol Biotechnol, 48: 504-509. 21. Poonam, N. and S. Dalel. 1995. ... Sci.... more ... IMD 2679. Appl Microbiol Biotechnol, 48: 504-509. 21. Poonam, N. and S. Dalel. 1995. ... Sci. 1: 7-14. 24. Shewali, SD and AB Pandit. 2007. Hydrolysis of soluble starch using Bacillus licheniformis alpha-amylase immobilized on superporous CELBEADS. Carbohydr. Res. ...
: Microorganisms which are capable of live and adapt in hostile habitats of different environment... more : Microorganisms which are capable of live and adapt in hostile habitats of different environmental factors such as extremes temperature, salinity, nutrient availability and pressure are known as extremophiles. Exposure to xenobiotic compounds is global concerns influencing the world population as a health hazard. Hence their removal is warranted using biological means that is very sustainable, potentially cost effective and eco-friendly in nature. Due to adaptation in extreme environments and unique defense mechanisms they are receiving more attention for the bioremediation of the xenobiotic compounds. They possess robust enzymatic and biocatalytic systems that make them attractive towards the effective removal of pollutants from the contaminated environment. Additionally, the extremophiles act as microfactories having specific genetic and biotechnological potential for the production of biomolecules. This review will provide an overview on microbial degradation metabolic pathways for bioremediation along with the molecular and physiological properties of diverse extremophiles from variety of habitats. Furthermore, the factors affecting the bioremediation process is also summarized.
Essential oils were extracted from different plant species (Acorus calamus, Artemisia nilagerica,... more Essential oils were extracted from different plant species (Acorus calamus, Artemisia nilagerica, Erigeron Canadensis) to evaluate their effect on the growth of four phytopathogenic fungi viz. Alternaria alternata, Botrytis cinerea, Fusarium oxysporum and Penicillium expansum following poisoned food technique method. Different concentration of oil such as 125ppm, 250ppm, 500ppm, 1000ppm and 5000ppm were taken to evaluate the effect. There was 100% inhibition in the growth of phytopathogenic fungi at 5000 and 1000ppm concentration by essential oil of A. calamus. At 500ppm concentration also 100% inhibition was found up to 7th day on F. oxysporum. Essential oil of A. nilagirica inhibits the growth of all phytopathogenic fungi at higher concentration. In case of P. expansum at 5000ppm concentration 100% inhibition was recorded even after 15 days of incubation. The decrease in colony diameter or growth of fungus was corresponding to the concentration of oil. In comparison to others two,...
A study on ectomycorrhizae and mycorrhizal fungi of Pinus kesiya (Royle ex Gordon) in 2-, 4-, 11-... more A study on ectomycorrhizae and mycorrhizal fungi of Pinus kesiya (Royle ex Gordon) in 2-, 4-, 11-, and 17-year-old pine plantations was carried out. Thirteen mycorrhizal fungi forming ectomycorrhiza with khasi pine were observed. Diversity index of mycorrhizal fungi was directly proportional to the age of the pine stand. The maximum number of fungal species was observed in the oldest stand. Evenness of the sheathing mycorrhizal fungi was also increased with the increase in age of pine. The sporocarps of Boletus luteus, Scleroderma aurantium, Tricholoma saponaceum, and Hygrophorus limacinus were observed as an early colonizing fungi with Pinus kesiya. However, in older plantations Russula lepida and Amanita phalloides were observed as late stage fungi. Boletus luteus and Scleroderma aurantium were dominant species in all the pine stands. Sporocarps of mycorrhizal fungi were maximum during the rainy season and minimum during the winter months. A positive correlation was observed betwe...
A total of 52 fungal species were isolated from forest foil. Phoma leveillei was recorded through... more A total of 52 fungal species were isolated from forest foil. Phoma leveillei was recorded throughout the study period. Fungal species Acremonium butyric, Aspergillus niger, Aurobasidium pullulans, Cladorrhinum foecundissimum, Cunningmella elegans, Geotrichum sp., Humicola fuscoatra, Humicola grisea, Paecilomyces farinosus, Torula herbarum were dominant and found commonly during the study period.
... IMD 2679. Appl Microbiol Biotechnol, 48: 504-509. 21. Poonam, N. and S. Dalel. 1995. ... Sci.... more ... IMD 2679. Appl Microbiol Biotechnol, 48: 504-509. 21. Poonam, N. and S. Dalel. 1995. ... Sci. 1: 7-14. 24. Shewali, SD and AB Pandit. 2007. Hydrolysis of soluble starch using Bacillus licheniformis alpha-amylase immobilized on superporous CELBEADS. Carbohydr. Res. ...
: Microorganisms which are capable of live and adapt in hostile habitats of different environment... more : Microorganisms which are capable of live and adapt in hostile habitats of different environmental factors such as extremes temperature, salinity, nutrient availability and pressure are known as extremophiles. Exposure to xenobiotic compounds is global concerns influencing the world population as a health hazard. Hence their removal is warranted using biological means that is very sustainable, potentially cost effective and eco-friendly in nature. Due to adaptation in extreme environments and unique defense mechanisms they are receiving more attention for the bioremediation of the xenobiotic compounds. They possess robust enzymatic and biocatalytic systems that make them attractive towards the effective removal of pollutants from the contaminated environment. Additionally, the extremophiles act as microfactories having specific genetic and biotechnological potential for the production of biomolecules. This review will provide an overview on microbial degradation metabolic pathways for bioremediation along with the molecular and physiological properties of diverse extremophiles from variety of habitats. Furthermore, the factors affecting the bioremediation process is also summarized.
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Papers by Dr Awadhesh Kumar Shukla