Plant Growth Promoting Activities of Spore-Forming and Vegetative Cells of Salt-Tolerant Rhizobacteria under Salinity Condition

Plant growth promoting rhizobacteria are able to enhance plant growth. This study isolated spore-forming from vegetable rhizosphere soil samples. These isolates were tested for their abilities promote and be used in bio-fertilizers. Thirty-nine with different characteristics obtained. Three isolates, TYS1.1, TYS3.3, TYS3.5, showed multifunctional activities on nitrogen fixation potassium solubilization. They IAA production liquid medium supplemented tryptophan NaCl, the vegetative cells of isolate TYS3.5 showing highest production. The colonization three okra roots was checked by spread plate technique scanning electron microscope. It found that could colonize a concentration 8.19 log CFU/g presence 50 mM NaCl solution. Bio-fertilizer produced immobilizing mixture carriers. viable enumerated during storage at room temperature 60 days. results number survival form obtained when using rice husk ash vermiculite as carrier. range 8.14-8.44 CFU/g. Bacillus sp. according 16S rDNA sequencing analysis.