Production of Indole Acetic Acid from soil bacteria: A alternative approach on plant growth

Indole acetic acid (IAA) production is a major assets of rhizosphere bacteria that stimulate and enhance plant growth. The present work deals with isolation and identification of indole acetic acid producing bacteria from the rhizosphericsoil collected from Pomegranate, Guava and Amla farm. Out of ten Indole acetic acid producing isolates, two wereselected as efficient producers. Spectrometric analysis of IAA was done after 24, 48 and 72 hours of culture whichshowed that the isolated bacteria produced maximum concentration of IAA after 72 hours of incubation period at 37°C. The concentration was measured using a standard IAA curve and the maximum concentration was obtained byAA2. Subsequently, effect on plant growth was tested by pot assay. The in vitro treatment of pea seeds with AA2isolate for germination showed better result than control. In conclusion the study suggests the IAA producing bacteriaas efficient inoculants to promote plant growth.