Abstract
Growing evidence has suggested that plant growth-promoting endophytic bacteria can regulate, which can be used as biofertilizers, bio-stimulants, and biocontrol agent. In the present study, Bacillus subtills IU10 was isolated from plants and was subjected to advanced chromatography and spectroscopic techniques for the extraction and isolation of indole-3-acetic acid (IAA). Up to 10 ?g/mL of IAA was quantified in the bacterial extract using the [2H2]-IAA internal standards in GC-MS analysis. PVK agar containing Ca3(PO4)2 was used to measure the ability of IU10 to solubilize phosphate. The clear zones formed by phosphate solubilization were measured to assess the phosphate solubilization potential. Azurol-S (CAS) medium was used for measuring siderophore production. The orange halo circles were measured to quantify the siderophore production. Endophytic IU10 inoculated plants showed significantly improvement root to shoot length, biomass and chlorophyll as compared to control. The data indicates that IU10 produce phytohormones, siderophore and immobilize nutrients could be used as biofertilizer. Keywords: phytohormones, nutrient immobilization, growth promotion, endophytes.
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