Isolation of Phosphate Solubilizing Bacteria and Fungi from Rhizospheres soil from Banana Plants and its Effect on the Growth of Amaranthus cruentus L

Abstract

Nutrient management is one of the most important factors in successful cultivation of plants. Biofertilizers can affect the quality and quantity of crop. Low phosphate solubility is one of the most important factors limiting the plant growth in various soils. Many microorganisms can enhance phosphate solubility, but little is known about the magnitude of their phosphorus solubilizing ability. The native populations of phosphate-solubilizing bacteria and fungi were studied in different rhizospheres soil samples obtained from banana plant and its effect on spinach plant (Amaranthus cruentus L.) in order to compare the results. The present study focuses on the phosphate-solubilizing capacity of bacteria and fungi in rhizospheres soil samples obtained from banana plant, revealing the dominance of Aspergillus species (234.12 mm) as major phosphate solubilizers, along with Bacillus subtilis (160.82 mm) followed by Pseudomonas aeruginosa 126.11, Penicillium sp., 99.02 and Micrococcus sp., 89. 4. In the present study potent solubilizers were identified as A. niger and B. subtilis. Hence an attempt was made to optimize the phosphate solubilization of the potential solubilizers at different pH with temperature. It is found out that both bacteria and fungi showed maximum phosphate solubilization at pH 3.0 with its specific temperature at 28 0 C and 37 0 C.