Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 10, Issue 1, 2008; Page No.(1-4)

PHOSPHORUS UP-TAKE BY P. FLUORESCENS AND EFFECT OF EXTERNAL PHOSPHATE ON MICROBIAL PHOSPHATE SOLUBILIZATION

ARTI DAVE AND H.H. PATEL

Abstract

Pseudonionas fluorescens, a farm soil isolate, was tested for its phosphate solubilizing (PS) activity in presence of increasing concentrations of phosphate (25-250mg P205) for both tricalcium phosphate (TCP) and rock phosphate (RP) in the Pikovskaya's medium and as well as for P uptake by the organism it self from soluble phosphate source (KH2PO4) present in the medium. PS activity was significantly higher with 50 mg P20, for both TCP & RP and showed drastic reduction thereafter. P consumption from the soluble phosphate was found maximum on 9th d on which maximum growth of the organism in term of 0.D. was also highest.

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