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Role of Proline and Potassium in Adaptation to Salinity in Different Types of Halophytes

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Handbook of Halophytes

Abstract

This review considers the specific mechanisms of salinity adaptation in different salt-tolerant plant species. The differences among salt tolerance mechanisms are primarily associated with the organization of long-distance ion transport, including limitation of Na+ and Cl− inflow to aboveground organs, their accumulation in vacuoles, or their excretion back to the environment (by salt glands on the leaf surface), maintaining a high K+/Na+ ratio in the cytoplasm and additional synthesis of organic osmolytes. The review provides the current data on the role of proline, one of the most common organic osmolytes, in salinity adaptation in different plant species. Proline biosynthesis and catabolism regulation, as well as its multiple functions in plant cells, were described under normal and stress conditions. The changes in contents of proline and K+ were analyzed in different types of halophytes, including salt-tolerant glycophytes, succulent euhalophytes, xerohalophytes, and recretohalophytes. Proline response to osmotic and ionic components of salinity, as well as its participation in fundamentally different adaptation mechanisms, was considered in different types of halophytes. The possibility of the mutual participation of proline and K+ in the formation of specific mechanisms of salinity adaptation in different types of halophytes was discussed.

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Authors and Affiliations

  1. K.A. Timiryazev Institute of Plant Physiology Russian Academy of Science, Moscow, Russia

    E. V. Shuyskaya & Z. F. Rakhmankulova

  2. International Platform for Dryland Research and Education (IPDRE), Tottori University, Tottori, Japan

    K. N. Toderich

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  1. E. V. Shuyskaya
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  2. Z. F. Rakhmankulova
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  3. K. N. Toderich
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  1. Faculty of Biology, Alexandru Ioan Cuza University, Iasi, Romania

    Marius-Nicusor Grigore

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  1. Instituto de Conservación y Mejora de la Agrodiversidad Valenciana (COMAV), Universitat Politècnica de València, Valencia, Spain

    Oscar Vicente

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Shuyskaya, E.V., Rakhmankulova, Z.F., Toderich, K.N. (2020). Role of Proline and Potassium in Adaptation to Salinity in Different Types of Halophytes. In: Grigore, MN. (eds) Handbook of Halophytes. Springer, Cham. https://doi.org/10.1007/978-3-030-17854-3_75-1

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  • DOI: https://doi.org/10.1007/978-3-030-17854-3_75-1

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  • Print ISBN: 978-3-030-17854-3

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