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Plant Growth-Promoting Rhizobacteria for Sustainable Agriculture

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Advances in Agricultural and Industrial Microbiology

Abstract

Plant growth-promoting rhizobacteria (PGPR) are closely allied with roots and can improve plant growth and inhibit the invading pathogens. The PGPR stimulates plant growth by various means, viz., increased nutrient uptake and production of hormones (IAA, gibberellins, cytokinins, etc.) and bioactive substances (to antagonize phytopathogenic microbes) along with the synthesis of enzymes that regulates plant ethylene levels. Recently, PGPR has attracted many researchers’ attention to the development of biofertilizers as an eco-friendly approach. However, potential PGPR selection is an important factor, as plants’ responses to environmental conditions often vary based on plant genotype, experimental sites, and seasons. A PGPR isolated from the native crop plants or their ecological zone is considered productive and efficient with steady results if reused at the same site and crop. Extensive studies have suggested that PGPR could have emerged as a promising and substitute chemical fertilizer method for agriculture sustainability. With this background, the interactions involving PGPR populations with plants are the current challenge to explore their use under various agroclimatic conditions. The diverse group of PGPR isolated from various plants’ rhizosphere and their role in increasing soil fertility, stress management, bioremediation, etc. are reviewed and discussed in this chapter.

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Acknowledgements

The authors would like to thank the Department of Studies in Biotechnology, Department of Studies in Microbiology and the Department of Studies in Botany, University of Mysore, for providing facilities.

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Correspondence to K. N. Amruthesh .

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© 2022 The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

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Brijesh Singh, S. et al. (2022). Plant Growth-Promoting Rhizobacteria for Sustainable Agriculture. In: Nayak, S.K., Baliyarsingh, B., Singh, A., Mannazzu, I., Mishra, B.B. (eds) Advances in Agricultural and Industrial Microbiology. Springer, Singapore. https://doi.org/10.1007/978-981-16-9682-4_1

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