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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2018, Volume : 6, Issue : 2
First page : (481) Last page : (492)
Article doi: : http://dx.doi.org/10.18782/2320-7051.6383

Review: Plant Growth Promoting Rhizobacteria: Blessing to Agriculture

Twisha S. Patel1*, Farida P. Minocheherhomji2
1Research Scholar, 2Associate Professor,
Department of Microbiology, B.P. Baria Science Institute, Navsari, Gujarat, India
*Corresponding Author E-mail: twishapatel.1489@gmail.com
Received: 31.03.2018  |  Revised: 22.04.2018   |  Accepted: 25.04.2018  


Soil microbes are vital components of soil important for soil fertility and plant growth as well as yield of crop. The plant secretes various metabolites as root exudates which attract bacteria for colonization. Bacteria are involved in various biotic activities of the soil ecosystem.They stimulate plant growth through solubilizing nutrients in soils, producing numerous plant growth regulators, protecting plants from phytopathogens by controlling or inhibiting them and improving soil quality. This naturally occurring root bacteria are beneficial for plant growth viz directly and indirectly known as plant growth promoting rhizobacteria (PGPR). The direct mechanisms include facilitating resource acquisition (nitrogen, phosphorus , Potassium , zinc and essential minerals) , ACC deaminase activity and modulating plant hormone levels (Auxin, cytokinine, giberellic acid , ethylene , abscisic acid). In indirect mechanisms by decreasing the inhibitory effects of various pathogens on plant growth and development in the forms of biocontrol agents ,Such as lytic enzyme production, antibiotics, HCN production , siderophore, antifungal activity, exopolysaccharide.  Indeed, the bacteria which are present around/in the plant roots (rhizobacteria) are more versatile in transforming, mobilizing, solubilizing the nutrients. Therefore, the rhizobacteria are the dominant driving forces in recycling the soil nutrients and increasing soil fertility.

Key word: Rhizobacteria, Rootexudates, Phytopathogens.

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Patel, T.S. and Minocheherhomji, F.P., Review: Plant Growth Promoting Rhizobacteria:  Blessing to Agriculture, Int. J. Pure App. Biosci.6(2): 481-492 (2018). doi: http://dx.doi.org/10.18782/2320-7051.6383

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