Qualitative Determination of Phosphate Solubilization, Salt Stress Response and Antibiotic Sensitivity in Pseudomonas Rhizospheric Bacterial Isolates of Wheat

Soil salinity and drought are among the environmental stresses that most severely affect plant growth and production around the world. In the present investigation, a total of twenty two Pseudomonas isolates associated with wheat plants grown in various locations of Uttar Pradesh, were isolated on the king^’s B medium and identified as Pseudomonas spp. All the Pseudomonas isolates were screened for salt tolerance and antibiotic resistance at variable concentrations. Most of the Pseudomonas isolates shown tolerance up to 4% NaCl concentration only. The isolate Ps-abn4 and Ps-muz2 isolates shown tolerance at 7% NaCl. Almost all isolates were inhibited at 10 μg/ml of concentration of tetracycline. The isolate Ps-lko-3 and Ps-abn- 4, were able to grow at 10 and 20 μg/ml of tetracycline concentration respectively. Whereas the isolate Ps-brk-2, Ps.muz-2 and Ps.jan-4 were found sensitive even at 1μg/ml concentration of tetracycline in the medium. Our results indicated that isolates from wheat rhizosphere have the potential which may promote plant growth of wheat directly and indirectly under saline condition.