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Role of the Plant Root Microbiome in Abiotic Stress Tolerance

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Seed Endophytes

Abstract

During a growing season, agricultural crops are frequently exposed to abiotic stresses, which hinder plant growth and reduce crop productivity. Abiotic stresses include extreme temperatures, drought, submergence, soil salinization, and nutrient imbalances, and many of these stresses are predicted to increase in frequency or severity in the coming century. Maintaining high levels of crop productivity under increasingly suboptimal growth environments will require the development of new agronomic tools. One new and promising strategy involves the utilization of microorganisms, which have been shown to be capable of mitigating abiotic stresses, and the plant microbiome has the potential of promoting growth and protecting the host through a variety of molecular mechanisms. While studies have begun to explore how specific members of the root microbiome act to enhance plant growth, we still lack a full understanding of the role of the broader root microbiome in shaping plant stress tolerance. Emphasizing three of the most agriculturally significant abiotic challenges, namely, drought stress, salinity stress, and phosphate stress, this chapter describes our current understanding of the specific mechanisms the root microbiome can employ to help boost plant fitness and summarizes new methods through which the plant root microbiome has been leveraged in agricultural settings to reduce damage from abiotic stresses.

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Authors and Affiliations

  1. Department of Plant and Microbial Biology, University of California, Berkeley, Berkeley, CA, USA

    Daniel F. Caddell, Siwen Deng & Devin Coleman-Derr

  2. Plant Gene Expression Center, USDA ARS, Albany, CA, USA

    Daniel F. Caddell & Devin Coleman-Derr

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  1. Daniel F. Caddell
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Correspondence to Devin Coleman-Derr .

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  1. Department of Botany, Institute of Science, Banaras Hindu University, Varanasi, India

    Satish Kumar Verma

  2. Department of Plant Biology, Rutgers University, New Brunswick, NJ, USA

    James Francis White, Jr

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Caddell, D.F., Deng, S., Coleman-Derr, D. (2019). Role of the Plant Root Microbiome in Abiotic Stress Tolerance. In: Verma, S., White, Jr, J. (eds) Seed Endophytes. Springer, Cham. https://doi.org/10.1007/978-3-030-10504-4_14

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