Regulation of Na+ and K+ homeostasis in plants: Towards improved salt stress tolerance in crop plants

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99 Citations (Scopus)

Abstract

Soil salinity is a major abiotic stress that results in considerable crop yield losses worldwide. However, some plant genotypes show a high tolerance to soil salinity, as they manage to maintain a high K+/Na+ ratio in the cytosol, in contrast to salt stress susceptible genotypes. Although, different plant genotypes show different salt tolerance mechanisms, they all rely on the regulation and function of K+ and Na+ transporters and H+ pumps, which generate the driving force for K+ and Na+ transport. In this review we will introduce salt stress responses in plants and summarize the current knowledge about the most important ion transporters that facilitate intra- and intercellular K+ and Na+ homeostasis in these organisms. We will describe and discuss the regulation and function of the H+-ATPases, H+-PPases, SOS1, HKTs, and NHXs, including the specific tissues where they work and their response to salt stress.

Original languageEnglish
Pages (from-to)326-345
Number of pages20
JournalGenetics and Molecular Biology
Volume40
Issue number1
DOIs
Publication statusPublished - 1 Jan 2017

Keywords

  • Ion transporters
  • Potassium
  • Proton pumps
  • Salinity
  • Sodium

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