Abstract

Plants are provided by wide-ranging antioxidant systems that can elude the detrimental negative effect of oxidative stress and plant growth-promoting rhizobacteria (PGPR) have been claimed to improve the antioxidant defense systems in plants. The Plant-Rhizobacteria signaling is established in a highly sophisticated manner and is controlled by extensive specialized secretory metabolites and ends up in altered gene expression in one or both of the interacting partners. PGPRs affect the nitrogen fixation, solubilization of insoluble potassium, production of siderophores, auxin, zeatin, gibberellin, antibiotics, abscisic acid, volatile organic compounds, lytic enzymes, the system acquired resistance, and moreover. Among the various strategies used to enhance agriculture productivity, use of PGPR has been advocated as one of the most suitable strategies for sustaining the health of the soil, crop, and agro-ecosystem and research aimed at a better understanding of plant-rhizobacteria communications is of crucial importance.