World Journal of
Pharmaceutical and Life Sciences

PHOSPHATE SOLUBILIZATION AND THEIR IMPACT ON SELECTED FIELD CROPS BY PHOSPHO-FUNGI ISOLATED FROM RHIZOSPHERE OF MEDICINAL PLANTS

Jyothi V., Vijayalakshmi V., Nandish G. and Thippeswamy B.*

ABSTRACT

Phosphorus is the king pin in Indian agriculture, after the Nitrogen, Phosphorus is second most important essential element for growth and development of plant and microorganisms. In this study, the phospho-fungi were isolated from different rhizosphere soil samples of medicinal plants from dry deciduas forest regions of Shivamogga district by serial dilution method. The isolates were coded as PSF 1 to PSF 66, among them 8 PSF were selected as maximum P solubilizers based on solubilization index and identified by microscopic observations using standard manuals. Then these cultures were further quantified for P solubilization includes pH and titrable acidity, P concentration in culture broth showed good results and also showed positive results for Siderophore production. Among the selected 8 PSF isolates, PSF 44 (Aspergillus awamori) showed maximum enzyme activity include both alkaline and acid phosphatase activity. The efficiency of PSF on plant growth and yield was tested under field condition with different crops, among them, PSF 39 in methi, PSF 38 in palak, PSF 44 in radish and PSF 10 in sorghum crop showed maximum growth and yield, also in plant P uptake, available P in rhizosphere soil of crop compared to the control plants. Due to the efficiency of phosphate solubilization and plant growth and yield promotion ability of selected PSF inoculants can be recommended as P solubilizer in agricultural field for sustainable agriculture.

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