Phosphate Solubilizing Microorganisms Associated with Chollangi Mangrove Soil in East Coast of India

Abstract

Twenty three bacterial strains isolated from the soil of Chollangi mangrove environment and demonstrated Phosphate solubilization potential of isolated bacterial strains. Seven isolates showed phosphate solubilization activity. Morpho physiologically and biochemically identified two isolates (CMB1 and CMB2) as Bacillus subtilis, three isolates (CMFP3, CMFP4 and CMFP5) as fluorescent Pseudomonas and two isolates (CMAZ1 and CMAZ2) as Azotobacter sp. Plant growth promoting ability of seven bacterial strains tested for optimization of P H , carbon source and temperature and estimated phosphate solubilization quantitatively. Isolated strains visualized colonies at P H 8.6 after 72 hrs, where as pure cultures visualized early within 18 hrs at P H 6.8-7.2 range. Observations indicated bacterial isolates of arid mangrove environment can easily adapted to normal soil P H and enhance phosphate content in soil.