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Physiological Role of Gamma-Aminobutyric Acid in Salt Stress Tolerance

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Salt and Drought Stress Tolerance in Plants

Part of the book series: Signaling and Communication in Plants ((SIGCOMM))

Abstract

Extreme salt environments are destructive to several plant and limiting the crop productivity. The effect of salt stress involves modifications in different metabolic and physiological processes. Salinity stress inhibits plant growth, to inhibit photosynthesis, to alter metabolism of reactive oxygen species, and to cause cell death that finally obstructs the production of crops. Plants synthesized various compounds that involve in signaling and play important role in stress tolerance. Gamma-aminobutyric acid (GABA) is a four-carbon, ubiquitous, non-protein amino acid. The synthesis of GABA occurs in the cytosol by an irreversible alpha-decarboxylation of L-glutamate by L-glutamate decarboxylase. During salt stress condition, the accumulation of GABA increases that helps in to stabilizing the intracellular pH of cell and carbon/nitrogen metabolism for the Krebs cycle. Exogenic GABA treatment enhanced plant growth, improved stress tolerance via scavenges free radicals, regulating enzyme activities and stabilization in plant against salinity stress. In this chapter, we highlight on the physiological and metabolic role of GABA in relation to salt stress tolerance.

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Authors and Affiliations

  1. Amity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow Campus, Lucknow, 226028, India

    Syed Uzma Jalil

  2. Department of Botany, University of Lucknow, Lucknow, 226007, India

    Mohammad Israil Ansari

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  1. Syed Uzma Jalil
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Correspondence to Mohammad Israil Ansari .

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  1. Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh

    Mirza Hasanuzzaman

  2. School of Land and Food, University of Tasmania, Hobart, TAS, Australia

    Mohsin Tanveer

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Jalil, S.U., Ansari, M.I. (2020). Physiological Role of Gamma-Aminobutyric Acid in Salt Stress Tolerance. In: Hasanuzzaman, M., Tanveer, M. (eds) Salt and Drought Stress Tolerance in Plants. Signaling and Communication in Plants. Springer, Cham. https://doi.org/10.1007/978-3-030-40277-8_13

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