Please use this identifier to cite or link to this item: http://hdl.handle.net/10603/6129
Title: Microbial Endophytes of crop plants and their role in plant growth promotion
Researcher: Anu Rajan S
Guide(s): Radhakrishna D
Keywords: Agricultural Microbiology
Crop plants
Microbial Endophytes
Upload Date: 8-Jan-2013
University: University of Agricultural Sciences, Bangalore
Completed Date: July, 2012
Abstract: 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.
Pagination: 266p.
URI: http://hdl.handle.net/10603/6129
Appears in Departments:Department of Agricultural Microbiology

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01_title.pdfAttached File149.54 kBAdobe PDFView/Open
02_certificate.pdf111.77 kBAdobe PDFView/Open
03_abstract & acknowledgement.pdf231.6 kBAdobe PDFView/Open
04_contents.pdf73.44 kBAdobe PDFView/Open
05_list of tables figures & plates.pdf169 kBAdobe PDFView/Open
06_chapter 1.pdf30.99 kBAdobe PDFView/Open
07_chapter 2.pdf195.88 kBAdobe PDFView/Open
08_chapter 3.pdf155.86 kBAdobe PDFView/Open
09_chapter 4.pdf6.66 MBAdobe PDFView/Open
10_chapter 5.pdf129.44 kBAdobe PDFView/Open
11_chapter 6.pdf66.82 kBAdobe PDFView/Open
12_chapter 7.pdf168.35 kBAdobe PDFView/Open
13_appendix.pdf8.1 MBAdobe PDFView/Open


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