ISSN: 0973-7510

E-ISSN: 2581-690X

K.N. Basavesha and V.P. Savalgi
1Department of Agricultural Microbiology, University of Agricultural Sciences, Dharwad- 580 005, India.
J Pure Appl Microbiol. 2015;9(2):1475-1480
© The Author(s). 2015
Received: 28/12/2014 | Accepted: 10/01/2015 | Published: 30/06/2015
Abstract

Fifty isolates of bacteria solubilizing both potassium and phosphorus was isolated from rhizosphere soil collected from different locations on  modified  Aleksandrov medium containing  potassium and phosphorus sources. All the isolates were characterized upto genus level based on morphological and biochemical characters. Thirty nine isolates were Gram positive, rod shaped and spore former were identified as Bacillus species and 11 isolates was Gram negative, rod shaped and non spore former were identified as Pseudomonas species. And functionally these isolates possessed the ability to solubilize both potassium and phosphorus minerals in medium. The maximum solubilization of potassium and phosphorous observed at 15 days after incubation ranged from 2.36 to 29.83 µg/ml and 3.44 to 14.25 per cent, respectively. They also produced growth promoting substance like IAA (3.38 to 8.90 µg/25ml) and GA (1.27 to 3.67 µg/25ml).

Keywords

Bacillus, Pseudomonas, Aleksandrov medium

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