A few PGPB enable the associating plants to tolerate abiotic stresses such as drought, salt, nutrient deficiency or excess, extremes of temperature and, presence of toxic metals. Thus, physical and chemical changes in plants resulted from PGPB-induced tolerance to abiotic stresses has been termed recently as ‘Induced Systemic Tolerance’ (IST). IST is elicited through the production of bacterial 1-aminocyclopropane-1-carboxylate (ACC) deaminase, antioxidants, cytokinin or VOCs
Enhancement of plant growth by root-colonizing