Vol. 7 No. 2
In vitro screening of native phosphate solubilizing bacteria for P solubilization and herbicides tolerance
Author(s): B. N. PANJA, W. M. MARAK, A.K. SINGH, P. MAZUMDAR AND J. SAHA
Abstract: The phosphate (P) solubilization efficiency, glyphosate and oxyfluorfen tolerance of fifteen phosphate solubilizing bacterial (PSB) isolates collected from the rhizosphere of native plant species grown in red laterite soil of Purulia District in West Bengal were tested in vitro. Based on P solubilization efficiency as judged by the zone of P solubilization on solid and percent P solubilization in liquid Pikaovskaya\'s media, six PSB isolates were screened as high, five as medium and four as low P solubilizers. In spite of inhibition in growth and P solubilization of majority of the isolates at recommended and double of the recommended doses of glyphosate, WPB-2, PSB-3 and PSB-26 registered high degree of P-solubilization. On the other hand growth of most of the PSB isolates was not suppressed even in double the concentration of oxyfluorfen but P solubilization of majority of the isolates except WPB-2 and PSB-26 was affected greatly. Based on lesser degree in inhibition of P solubilization in presence of herbicides, WPB-2 and PSB-26 were assumed to be promising glyphosate and oxyfluorfen tolerant P bioinoculants and could be exploited for P nutrition in these two herbicides applied situation..
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