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It is not all about sodium: revealing tissue specificity and signalling roles of potassium in plant responses to salt stress

Citation

Wu, H and Zhang, X and Giraldo, JP and Shabala, S, It is not all about sodium: revealing tissue specificity and signalling roles of potassium in plant responses to salt stress, Plant and Soil, 431, (1-2) pp. 1-17. ISSN 0032-079X (2018) [Refereed Article]

Copyright Statement

Copyright 2018 Springer Nature Switzerland AG

DOI: doi:10.1007/s11104-018-3770-y

Abstract

Background: Salinity is a global issue threatening agricultural production systems across the globe. While the major focus of plant salinity stress tolerance research has been on sodium, the transport and physiological roles of K+ in plant salt stress response has received less attention. This review attempts to bridge this knowledge gap.

Scope: The major emphasis is on newly proposed K+ signalling roles and plant salt tolerance cell- and tissue specificity. In addition to summarizing the importance of K+ retention for plant salt tolerance, we focus on aspects that were not the subject of previous reviews including (1) the importance of HAK/KUP family of transporters in K+ uptake in salt stressed plants and its possible linkage with Ca2+ and ROS signalling; (2) control of xylem K+ loading in salt stressed plants, control of phloem K+ recirculation in salt stressed plants and the potential importance of plants' ability to efficiently coordinate K+ signals between root and shoot; (3) the buffering capacity of the vacuolar K+ pool; and (4) mechanisms of restoring the basal cytosolic K+ levels by coordinated activity of tonoplast K+-permeable channels.

Conclusions: Overall, this review emphasises the need to fully understand the newly emerging roles of K+ and regulation of its transport for improving salinity stress tolerance in plants.

Item Details

Item Type:Refereed Article
Keywords:cell- and tissue- specificity, potassium channels and transporters, potassium homeostasis, potassium retention, programmed cell death, signalling, sodium, salinity
Research Division:Biological Sciences
Research Group:Plant Biology
Research Field:Plant Physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Other Plant Production and Plant Primary Products
Objective Field:Plant Production and Plant Primary Products not elsewhere classified
UTAS Author:Wu, H (Mr Honghong Wu)
UTAS Author:Shabala, S (Professor Sergey Shabala)
ID Code:130055
Year Published:2018
Web of Science® Times Cited:13
Deposited By:Agriculture and Food Systems
Deposited On:2019-01-08
Last Modified:2019-03-08
Downloads:0

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