National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
An investigation was carried out to isolate plant growth promoting rhizobacteria from (PGPR) the rhizosphere, endorhizosphere and root nodules of green gram soil samples collected from three different agro climatic zones of Karnataka. A total of 29 rhizobial isolates from nodules isolated in that based on morphology and Gram reaction these strains were tentatively grouped as Rhizobium (29). All isolates were evaluated for eight plant growth promotional traits under in vitro. In particularly isolates 2DWRR and 9DWRR fixed respectively 5.07 and 4.46 mg N2 g-1 of carbon utilized respectively. Isolate 12UKR produced 13.61 µg ml-1 IAA. Isolate 10DWRR produced 7.72 µg GA per 25 ml respectively. Under in vitro studies some isolates inhibited plant pathogens tested. Isolate 2UKR recorded the maximum zinc solubilization (7.00 mm) followed by 2DWRR. Two isolates of Rhizobium namely; 2DWRR and 9DWRR were efficient in traits like nitrogen fixation and nodule formation on green gram. The study helped to identify isolate 2DWRR, 9DWRR as potential PGPR strains for green gram.
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