Drought constitutes among the most popular significant abiotic factors impacting dry land agricultural productivity. It results an increase in ROS, which disrupts oxidation-reduction equilibrium and triggers oxidative damage, thereby impacting the physiological state of plants. It also reduces crop yields by altering other biological molecules and growth hormones. As a result of this, the demand for sustainable options to safeguard the integrity of food supplies worldwide has shot up. Rhizobacteria are soil microbes that dwell near the roots of plants and are either directly or through indirect means involved in promoting the development and expansion of plants by producing and releasing a large number of regulatory chemicals. PGPR, via multiple processes such as osmotic modifications, enhanced antioxidant function, phytohormone synthesis, and so on, not just guarantees the plant's survival under drought but additionally enhances its development. The application of PGPR in the form of biofertilizer for crops is an effective method for increasing crop production and protecting crops from abiotic challenges to ensure sustainable farming. The many processes involving PGPR in drought stress resistance are thoroughly discussed in this paper.

Keywords: Drought tolerance, PGPR, water stress, biofertilizer.