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Potential of Rhizobia as Plant Growth-Promoting Rhizobacteria

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Microbes for Legume Improvement

Abstract

Bacteria collectively known as rhizobia are widely studied due to their ability to associate with legumes, establishing a symbiotic relationship in which the fixation of atmospheric nitrogen is the main benefit to the plant. These bacteria are capable of colonizing the rhizosphere of nonhost plants, as well as living inside the plant tissues as endophytes. These traits, along with their ability to produce phytohormones, solubilize, and bind nutrients, besides eliciting plant defense reactions against pathogens, turn rhizobia into organisms with high potential to act as plant growth-promoting rhizobacteria (PGPR). This review intends to present research results obtained so far concerning to the application of rhizobia as PGPR, highlighting the benefits of this practice adopted to increase the plant growth and yields and nutrient uptake, besides focusing on other mechanisms used by rhizobia to promote plant health. These microorganisms, due to the diverse range of activities as well as the number of rhizobia stored in different culture collections around the world, may provide an important resource to rationalize the use of fertilizers and chemicals in agriculture.

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Vargas, L.K., Lisboa, B.B., Giongo, A., Beneduzi, A., Passaglia, L.M.P. (2010). Potential of Rhizobia as Plant Growth-Promoting Rhizobacteria. In: Khan, M.S., Musarrat, J., Zaidi, A. (eds) Microbes for Legume Improvement. Springer, Vienna. https://doi.org/10.1007/978-3-211-99753-6_7

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