Abstract: The distribution pattern of PSB was assessed in cultivated soils. PSB isolates were used for the production of IAA, measurement of pH and titrable acidity and germination of seeds. Nine strains namely PSB1, PSB2, PSB3, PSB4, PSB5, PSB6, PSB7, PSB8 and PSB9 were identified. Testing of these strains for phosphate solubilization revealed that among these, three were able to perform well (PSB1, PSB2, and PSB5) and among these three strains PSB 1 was found to be superior in forming halo zone of phosphate solubilization followed by PSB 5. The population level of PSB were highest in rhizosphere soil of Chilly (Capsicum) followed by Solanum, Radish and lowest in the rhizosphere soil of Banana. Further all isolates were able to secrete IAA and acid phosphatase under invitro condition. All the PSB strains were able to grow well in the pH range between 4.5-6.7. The seeds that were inoculated with PSB strains showed faster germination and linear growth.
Keywords: phosphate solubilizing bacteria (PSB), screening, distribution pattern, IAA.
Title: Isolation Distribution and Screening of Phosphate Solubilizing Bacteria from Different Crop Fields
Author: A.Sangeetha, V.Kavitha
International Journal of Life Sciences Research
ISSN 2348-313X (Print), ISSN 2348-3148 (online)
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