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Role of PGPR Under Different Agroclimatic Conditions

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Book cover Bacteria in Agrobiology: Plant Probiotics

Abstract

Root-colonizing bacteria (rhizobacteria) that exert beneficial effects on plant development via direct or indirect mechanisms have been defined as plant growth-promoting rhizobacteria (PGPR). Rhizobacteria are capable of stimulating plant growth through a variety of mechanisms that include improvement of plant nutrition, production and regulation of phytohormones, and suppression of disease-causing organisms. While considerable research has demonstrated their potential utility, the successful application of PGPR in the field has been limited by a lack of knowledge of ecological factors that determine their survival and activity in the plant rhizosphere. One of the main problems when introducing beneficial microbes to the plant rhizosphere is that the PGPR do not survive or do not execute their specific function. To be effective, PGPR must maintain a critical population density of active cells. Inoculation with PGPR strains can temporarily enhance the population size, but inoculants often have poor survival and compete with indigenous bacteria for available growth substrates. Therefore, an understanding of their diversity, colonization ability, mechanisms of action, formulation, and application will facilitate their contribution in the management of sustainable agricultural systems.

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  1. Department of Microbiology, G.B. Pant University of Agriculture and Technology, Pantnagar, Uttaranchal, 263145, India

    Anju Rani & Reeta Goel

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  1. Anju Rani
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  2. Reeta Goel
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Correspondence to Reeta Goel .

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  1. Dept. of Botany Microbiology, Gurukul Kangri Univ., Haridwar (U.K.), 249404, India

    Dinesh K. Maheshwari

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Rani, A., Goel, R. (2012). Role of PGPR Under Different Agroclimatic Conditions. In: Maheshwari, D. (eds) Bacteria in Agrobiology: Plant Probiotics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-27515-9_9

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