J Integr Plant Biol. ›› 2014, Vol. 56 ›› Issue (3): 231-249.DOI: 10.1111/jipb.12159

Special Issue: Plant Signal Transduction

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Transport, signaling, and homeostasis of potassium and sodium in plants

Eri Adams and Ryoung Shin*   

  1. RIKEN Center for Sustainable Resource Science, Yokohama, Kanagawa, Japan
  • Received:2013-10-29 Accepted:2013-12-31 Published:2014-03-01
  • About author:*Correspondence: E-mail: ryoung.shin@riken.jp

Abstract:

Potassium (K+) is an essential macronutrient in plants and a lack of K+ significantly reduces the potential for plant growth and development. By contrast, sodium (Na+), while beneficial to some extent, at high concentrations it disturbs and inhibits various physiological processes and plant growth. Due to their chemical similarities, some functions of K+ can be undertaken by Na+ but K+ homeostasis is severely affected by salt stress, on the other hand. Recent advances have highlighted the fascinating regulatory mechanisms of K+ and Na+ transport and signaling in plants. This review summarizes three major topics: (i) the transport mechanisms of K+ and Na+ from the soil to the shoot and to the cellular compartments; (ii) the mechanisms through which plants sense and respond to K+ and Na+ availability; and (iii) the components involved in maintenance of K+/Na+ homeostasis in plants under salt stress.

Adams E, Shin R (2014) Transport, signaling, and homeostasis of potassium and sodium in plants. J Integr Plant Biol 56: 231–249. doi: 10.1111/jipb.12159

Key words: Homeostasis, potassium, signalling, sodium, tranport

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