Study on Plant Growth Promoting Rhizobacteria as Bio Fertilizer and Bio-Control Agents

Plant Growth Promoting Rhizobacteria (PGPR) are a group of free-living bacteria that colonize the rhizosphere and contribute to increased growth and yield of crop plants. PGPR have many traits that make them appropriate as biofertilizer and bio-control agents. These include the ability to grow rapidly, rapid utilization of seed and root exudates, colonization as well as multiplication in the rhizosphere and even in the interior of the plants as endophytes. Direct plant growth promotion mechanisms include (a) bio-fertilization, (b) stimulation of root growth, (c) rhizoremediation and (d) plant stress control. Mechanisms of biological control by which rhizobacteria can promote plant growth indirectly are by reducing the level of disease which include antibiosis, induction of systemic resistance and competition with pathogens for nutrients and niches. In this artical we will explore the study about “plant growth promoting rhizobacteria as bio-fertilizer and bio-control agents”.