EFFICIENCY OF PLANT GROWTH PROMOTING RHIZOBACTERIA FOR THE ENHANCEMENT OF TOMATO GROWTH

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dc.contributor.advisorSHIRKOT, C.K.
dc.contributor.authorSHARMA, RASHMI
dc.date.accessioned2017-01-09T15:39:50Z
dc.date.available2017-01-09T15:39:50Z
dc.date.issued2012
dc.description.abstractABSTRACT Plant growth promoting rhozobacteria (PGPR) are known to influence plant growth by various direct or indirect mechanisms. Environmental protection and the need to enhance agricultural output have made research in new sustainable technologies necessary. As in most sectors of agriculture, there is increasing demand for organic tomatoes. Therefore, the overall strategy for increasing crop yields, sustaining them at a high level and maintaining proper soil health must include an integrate approach to develop effective and more consistent active plant growyh promoting rhozobacteria (PGPR) inocula, because, there is a considerable experimental support for the idea that PGPR may be used as biofertilizers and biocontrol agent to increase the early growth of tomato seedlings in the nursery and subsequently the yield with concomitant decrease in the chemical fertilizers and pesticides. Therefore, the aim of this study is to screen the indegeneous plant growth promoting rhizobacterial isolates for multifarious plant growth promoting traits and to determine the effect of inoculation with PGPR’s on growth of tomato seedlings in filter paper assay and in soil less medium under growth chamber. The bacterial strains were characterized for plant growth promoting activities and antifungal-antibiotic activities under in vitro conditions. Seed bacterization with bacterial strains increased the germination percent and overall root/shoot parameters of tomato seedlings in filter paper assay and under growth chamber. Among twenty seven bacterial strains, including refrence strain, isolate S2 showed significant effect in filter paper assay with maximum increase in per cent germination, root length, plant dry weight and vigour index. Isolate *S25 showed maximum increase in root length, root dry weight, shoot dry weight and plant biomass in growth chamber. *S25 also possessed maximum P-solubilization, maximum IAA production, siderophore synthesis, chitinase activity, protease activity, ability to fix atmospheric nitrogen and antifungal activity against Alternaria solani, D.necatrix and Sclerotium rolfsii. Therefore, *S25 strain had considerable growth promotion and biocontrol ability, and it could be used as a biofertilizer or biocontrol agent.en_US
dc.identifier.other47837
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/95204
dc.language.isoenen_US
dc.subBiochemistryen_US
dc.subject---en_US
dc.subjectrhozobacteria (PGPR) ,Plant growth promotingen_US
dc.these.typeM.Sc
dc.titleEFFICIENCY OF PLANT GROWTH PROMOTING RHIZOBACTERIA FOR THE ENHANCEMENT OF TOMATO GROWTHen_US
dc.typeThesisen_US
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