23. Potassium and Sodium Transporters: Improving Salinity Tolerance in Plants

  1. Dr. Narendra Tuteja4,5,
  2. Dr. Sarvajeet Singh Gill4,6,
  3. Prof. Antonio F. Tiburcio7 and
  4. Dr. Renu Tuteja4
  1. Toshio Yamaguchi1,
  2. Nobuyuki Uozumi2 and
  3. Tomoaki Horie3

Published Online: 30 MAR 2012

DOI: 10.1002/9783527632930.ch23

Improving Crop Resistance to Abiotic Stress, Volume 1 & Volume 2

Improving Crop Resistance to Abiotic Stress, Volume 1 & Volume 2

How to Cite

Yamaguchi, T., Uozumi, N. and Horie, T. (2012) Potassium and Sodium Transporters: Improving Salinity Tolerance in Plants, in Improving Crop Resistance to Abiotic Stress, Volume 1 & Volume 2 (eds N. Tuteja, S. S. Gill, A. F. Tiburcio and R. Tuteja), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, Germany. doi: 10.1002/9783527632930.ch23

Editor Information

  1. 4

    International Centre for Genetic Engineering and Biotechnology Plant Molecular Biology Group, Aruna Asaf Ali Marg, New Delhi 110 067, India

  2. 5

    MD University, Centre for Biotechnology, Rohtak 124 001, Haryana, India

  3. 6

    Aligarh Muslim University, Department of Botany, Aligarh 202 002, Uttar Pradesh, India

  4. 7

    Universitat de Barcelona, Unitat de Fisiologia Vegetal, Facultat de Farmàcia, Av. Joan XXIII, S/N, 08028 Barcelona, Spain

Author Information

  1. 1

    Niigata University of Pharmacy and Applied Life Sciences, Department of Microbiology, Faculty of Pharmacy, Niigata 956-8603, Japan

  2. 2

    Tohoku University, Department of Biomolecular Engineering, Graduate School of Engineering, Sendai 980-8579, Japan

  3. 3

    Shinshu University, Division of Applied Biology, Faculty of Textile Science and Technology, Nagano 386-8567, Japan

Publication History

  1. Published Online: 30 MAR 2012
  2. Published Print: 14 MAR 2012

ISBN Information

Print ISBN: 9783527328406

Online ISBN: 9783527632930



  • ENA1/PMR2;
  • HAK/KUP/KT transporters;
  • HKT transporter;
  • NHX transporter;
  • salinity;
  • transgenic;
  • transporters;
  • SOS1


Crop productivity can be greatly affected by soil salinity since high concentrations of Na+ cause osmotic stress and ion-specific cytotoxicity in most plant species. Plants have developed multiple mechanisms to alleviate Na+ stresses, which include exporting Na+ from the cells, compartmentation to vacuoles, and preventing Na+ from being transported to photosynthetic organs such as leaves. Recent advancements in molecular and genetic studies have led to the identification of several classes of ion transporters that are involved in these processes and have extended our understanding of the molecular mechanisms that plants use to circumvent Na+ toxicity. Among these, the NHX-type tonoplast cation/H+ antiporters, the HKT-type plasma membrane Na+(K+) transporters, and the SOS1-type plasma membrane Na+/H+ antiporters have drawn particular attention due to their physiological significance under salinity stress. Moreover, ectopic tissue-specific overexpression of these molecules has provided promising evidence for the utility of a transgenic approach toward improving crop salinity tolerance using genes encoding Na+ transporters.