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Accueil du site → Doctorat → Inde → 2014 → Eco physiological and microbiological studies on jatropha curcas linn bio diesel plant

Dr. Harisingh Gour Vishwavidyalaya 52014°

Eco physiological and microbiological studies on jatropha curcas linn bio diesel plant

Ahirwar Rajendra Kumar

Titre : Eco physiological and microbiological studies on jatropha curcas linn bio diesel plant

Auteur : Ahirwar Rajendra Kumar

Université de soutenance : Dr. Harisingh Gour Vishwavidyalaya

Grade : Doctor of Philosophy (PhD) in Botany 2014

Jatropha curcas Linn. is a large shrub occurring almost throughout India. Leaves are alternately arranged, flowers in loose panicles of the cymes, yellowish green, fruits are 2.5cm, long ovoid. Seeds are ovoid-oblong, dull brownish black. Seeds are used for the extraction of oil. Concept of bio-diesel (bio-fuel) dates back to 1895 when Dr. Rudolf Diesel built the first diesel engine to run on vegetable oil. Bio-diesel is a variety of Ester based oxygenated fuels derived from natural, renewable biological resources such as vegetable oils. Bio-diesel operates in internal combustion engines like diesel engines there by requiring no essential engine modifications. Moreover it can maintain payload capacity and range of oil conventional diesel unlike fossil diesel, pure bio-diesel is biodegradable, nontoxic and essentially free of sulphur and aromatics. It is a versatile fuel that can be used as a substitute or additive in a range of diesel fuel applications. Different fats and vegetable oils produce somewhat different bio-diesel fuels. Presence of microorganisms in natural soils in good numbers indicated the role of microbes in decomposition of organic matter and mineralization of nutrient to enable Jatropha curcas plant for luxurious growth and development. Microfungi viz., Aspergillus sp., Rhizopus sp., Alternaria sp., Mucor sp., Helminthosporium sp., Curvularia sp., Trichoderma sp., Chaetomium sp. were found colonizing the surface of seeds of varying age of Jatropha curcas plants in our study. Species of microbacteria like Nitrobacter, Bacillus, Nitrosomonas, Micrococcus, Pseudomonas, Mycobacter, Vibrio etc. were found colonizing the surface of Jatropha curcas seed in almost all seasons of the year in my study. Leaf, stem, root and de-oiled seed cake extracts of Jatropha curcas would serve as a natural phytochemicals against bacterial and fungal phytopathogens for agricultural applications at low cost and safe practice. Jatropha curcas seeds has poisonous compounds viz., curcin (a phyto-toxcin) curcasin (Protein synthesis inhibitors) and phorbol esters and flavonoid compounds which make plant potent against microorganisms. The bio-diesel obtained from the plant Jatropha would helps in securing energy security.

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Page publiée le 6 avril 2021