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Microbial Endophytes of crop plants and their role in plant growth promotion

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Title Microbial Endophytes of crop plants and their role in plant growth promotion
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Contributor Radhakrishna D
 
Subject Agricultural Microbiology
Crop plants
Microbial Endophytes
 
Description Endophytic microorganisms that colonize the internal tissues of plants enhance agricultural production through plant growth promoting mechanisms. Considering the enormous potential of the endophytic
newlinebacteria a research programme has been framed to study the role of endophytic microorganisms in plant growth promotion of crop plants belonging to cereals, pulses, oilseeds, and vegetables. The population of
newlineendophytic bacteria was more in the roots than the shoots in the range of 5.8 to 1.3 x 105 cfu/g tissue. Seven of the nineteen bacterial isolates selected were Gram positive belonging to Bacillus sp. while twelve were
newlineGram negative belonging to Citrobacter, Klebsiella, Acinetobacter,
newlinePseudomonas and Vibrio. All the endophytic isolates produced GA, IAA
newlineand cytokinin in the culture broth. The rice isolate OSE2, and the chilli
newlineisolates CAE9 and CAE10 inhibited Colletotrichum sp., Fusarium sp,
newlineRhizoctonia sp. and Pythium sp invitro. The isolate LEE19 identified as Klebsiella sp. possessed the nitrogenase gene (nifH). All the endophytic bacterial isolates enhanced the seedling growth of paddy in the range of
newline19.3% to 71.43% over uninoculated control. The endophytic tomato
newlineisolate LEE19, (Klebsiella sp.) improved rooting and establishment of
newlinecuttings of Hibiscus rosasinensis in the nursery. The treatment with the endophytic bacterial isolate LEE18 (Pseudomonas sp.) to tissue culture banana at primary and secondary hardening stages significantly
newlineincreased the root biomass. The plant growth promotion potential of endophytic bacteria on tomato, paddy and cowpea was evaluated in the
newlinepot culture experiments and showed increased growth and yield in all the three crops.
Summary p. 216-222, References p. 223-266, Appendix included
 
Date 2013-01-08T07:16:22Z
2013-01-08T07:16:22Z
2013-01-08
n.d.
July, 2012
2012
 
Type Ph.D.
 
Identifier http://hdl.handle.net/10603/6129
 
Language English US
 
Relation --
 
Rights university
 
Format 266p.
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None
 
Coverage Agricultural Microbiology
 
Publisher Bangalore
University of Agricultural Sciences, Bangalore
Department of Agricultural Microbiology
 
Source INFLIBNET