Volume No. 8 Issue No.: 4 Page No.: 853-858 April-June 2014

 

ISOLATION OF POTENTIAL THERMOTOLERANT PHOSPHATE SOLUBILIZING FUNGAL STRAINS FROM AGRICULTURAL SOILS

 

Nishat Khatoon *, Munawer Khan Md. and Md. Mazharuddin Khan

Department of Microbiology, Mumtaz Degree and P.G College
Malakpet, Hyderabad (INDIA)

 

Received on : February 10, 2014

 

ABSTRACT

 

Thirty eight fungal strains were isolated from local agricultural soils out of which eleven strains of Aspergillus niger and Aspergillus fumigatus showed zone of phosphate solubilization. These strains were further screened for their thermotolerant character by plate and broth assay method. A. niger F24 and A. fumigatus F27 showed the highest solubilization index 2.57 and 2.86 at 40°C and 1.96 and 2.13 at 45°C and solubilized 246μg/ml and 290μg/ml of tri- calcium phosphate at 45°C with drop in pH. Thus, the use of these microorganisms as biofertilizers, even in hot summer may not only compensate for higher cost of manufacturing fertilizers in industry, but also mobilizes phosphate present in agricultural soil in hot summer season.

 

Keywords : Aspergillus niger, Aspergillus fumigatus, Thermotolerant, Fungal strains, Phosphate solubilizers

 

 

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