Identification of Plant Growth Promoting Rhizobacteria as Biofertilizer for Salt Stress Environment

Plant growth promoting rhizobacteria are found in the rhizosphere of plants worldwide and enhance their growth and development under unfavorable environmental condition. In the present investigation, twelve plant growth promoting rhizobacteria were isolated from the rhizosphere of different plants. Among these isolated rhizobacteria, identified one out of twelve, which showed best biofertilizer activity efficiently and also performing well under salt stress environment. Such biofertilizer activities were observed as solubilization of phosphorus and potassium, production of iron sequester complex-siderophore, production of auxin (a plant growth regulator) and production of hydrogen cyanide (an anti-microbial compound). The best performing rhizobacterial isolate, which showed best biofertilizer activity, was confirmed as Pseudomonas aeruginosa based on 16S rRNA sequencing under salt stress conditions.