Enhancement of Plant Growth by Using PGPR for a Sustainable Agriculture: A Review
Anshu Kumar, Ritesh Kumar, Mamta Kumari, Suraj Goldar
Abstract
Biotic and abiotic stresses exert a serious impact on crop productivity throughout the world. The alternate strategy is to introduce tolerant microbes into plants under stress conditions. Intensive research attempts are underway to improve plant growth, enhance tolerance level against these stresses and protect plants by using plant growth promoting rhizobacteria (PGPR) which have a great potential for sustainable crop production. PGPR play a direct role in maintaining better plant health by nitrogen fixation, phosphate solubilisation, phytohormone production etc. and indirectly by siderophore production, antibiotic production, ACC deaminase activity, Induced Systemic resistance etc. The microbes provide plants resistance to stress by enhancing the activity of the antioxidant enzymes and other non-enzymatic antioxidants.