Efficiency of the Salt Tolerant Plant Growth Promoting Rhizobacteria Isolated from Rice Crop under Saline Condition

Plant growth promoting rhizobacteria (PGPR) are beneficial bacteria that can help plants respond better to biotic and abiotic challenges. Eight salt-tolerant bacterial isolates were identified from rice rhizosphere in this research. These isolates were morphologically and biochemically described and identify at genus level. Plant growth-promoting properties such as IAA production, Gibberellic acid production, HCN generation, inorganic phosphate solubilization, and siderophore production were chosen among the isolates. And also, the different level of 1,5,10,15,20 & 25 % NaCl concentration was tested. Among the all tests the isolate STRB 5 was perform best in IAA production, Gibberellic acid production, HCN generation, inorganic phosphate solubilization, and siderophore production compare to other different isolates. All the isolates were tested for antifungal activity against plant pathogens Machrophomina pasolina and Fusarium oxysporum. STRB 5 exhibited the most effective antifungal activity against both test pathogens. In conclusion, the halotolerant PGPR strain STRB 5 described in this study might have great potential to under different salt stress conditions in invitro condition.