ISSN: 0973-7510

E-ISSN: 2581-690X

Open Access
Suma C. Kammar , Ravindra C. Gundappagol, Shubha S., G.P. Santhosh and M.V. Ravi*
Department of Agricultural Microbiology,
*Department of Soil Science and Agricultural Chemistry, University of Agricultural Sciences, Raichur – 584 102, Karnataka, India.
J Pure Appl Microbiol. 2016;10(4):2815-2819 | © The Author(s). 2016
Received: 19/08/2016 | Accepted: 03/10/2016 | Published: 31/12/2016

The experiment was conducted to isolate KSB from 75 rhizosphere soils of different crop plants around Raichur district. Out of these, 28 isolates were selected as potential Potassium Solubilising Bacteria (KSB) based on zone of solubilisation and further these isolates were tested for morphological and biochemical characterization. Whereas five (KSBL-12, KSBR-28, KSBR-44, KSBD-55 and KSBD-72) isolates were identified as Pseudomonas and remaining 23 as Bacillus. Among the isolates KSBD-58 released maximum amount of K from muscovite mica (42.95 µg ml-1) which was significantly higher than all other isolates including the reference strain (Frateuria aurantia) which released potassium of 38.95 µg ml-1. All the isolates produced one or the other organic acids.


KSB, Bacillus mucilagenosus,  Frateuria aurantia, Bacillus edaphicus.

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