ABSTRACT
The plant growth-promoting rhizobacteria (PGPR), the group of microorganism’s present in the soil or rhizosphere can actively colonize plant roots and increase plant growth through different mechanisms. These do not belong to a single group; indeed, they have great diversity. Some of the common PGPR which have been identified belong to genera such as Bacillus, Pseudomonas,and many others. PGPRs have several applications, like increasing the availability of nutrients in the rhizosphere, increased root volume which is related to more nutrient absorption, to stimulate plant growth via the production of plant hormones, to control or inhibit the activity of plant pathogens, to improve soil structure, mineralization of organic pollutants that is thebioremediation of polluted soils. Theyare also used as biofertilizers, also beingknown for their use in phosphate solubilization, siderophore production, biocontrol agents, and biological fungicides, etc. PGPRs are a healthier choice to improve crop efficiency as well as the quality. They improve the chemical and microbial property of soil and enhance the amount of plant enzymes for a better defense mechanism in plants, plant growth is enhancedthrough various mechanisms like nitrogen fixation, solubilization of phosphate, quorum sensing, etc. In summary, they offer various ways to replace chemical fertilizers, pesticides, etc.
