ABSTRACT
Mineral phosphate solubilization activities by Allochromatium sp. GSKRLMBKU-01 on dicalcium and tricalcium phosphate was investigated. The biomass, di- and tricalcium phosphate solubilization increased with the progress of incubation period upto 8th day and decreased with further incremental incubation period. The highest solubility of dicalcium phosphate (558.0 ± 9.2 μg P/ml) and tricalcium phosphate (568.0 ± 8.0 μg P/ml) was recorded on 8th day of incubation period. The maximum optical density of biomass of the bacterium on dicalcium and tricalcium phosphate was 1.389 ± 0.110 and 1.206 ± 0.108 respectively on 8th day of incubation period. A positive correlation coefficient (r) was recorded between growth, dicalcium phosphate(r=0.965) and tricalcium phosphate (r=0.786) solubilization.