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Regulation of potassium transport in plants under hostile conditions: implications for abiotic and biotic stress tolerance
Citation
Shabala, S and Pottosin, I, Regulation of potassium transport in plants under hostile conditions: implications for abiotic and biotic stress tolerance, Physiologia Plantarum, 151, (3) pp. 257-279. ISSN 0031-9317 (2014) [Refereed Article]
Copyright Statement
Copyright 2014 Scandinavian Plant Physiology Society
Abstract
Intracellular potassium homeostasis is a prerequisite for the optimal operation
of plant metabolic machinery and plant’s overall performance. It is controlled
by K+ uptake, efflux and intracellular and long-distance relocation, mediated
by a large number of K+-selective and non-selective channels and transporters
located at both plasma and vacuolar membranes. All abiotic and biotic stresses
result in a significant disturbance to intracellular potassium homeostasis. In
this work, we discuss molecular mechanisms and messengers mediating
potassium transport and homeostasis focusing on four major environmental
stresses: salinity, drought, flooding and biotic factors. We argue that cytosolic
K+ content may be considered as one of the ‘master switches’ enabling plant
transition from the normal metabolism to ‘hibernated state’ during first hours
after the stress exposure and then to a recovery phase. We show that all
these stresses trigger substantial disturbance to K+ homeostasis and provoke
a feedback control on K+ channels and transporters expression and posttranslational
regulation of their activity, optimizing K+ absorption and usage,
and, at the extreme end, assisting the programmed cell death. We discuss
specific modes of regulation of the activity of K+ channels and transporters by
membrane voltage, intracellular Ca2+, reactive oxygen species, polyamines,
phytohormones and gasotransmitters, and link this regulation with plantadaptive
responses to hostile environments.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | stress, adaptation, potassium |
| Research Division: | Biological Sciences |
| Research Group: | Plant Biology |
| Research Field: | Plant Physiology |
| Objective Division: | Expanding Knowledge |
| Objective Group: | Expanding Knowledge |
| Objective Field: | Expanding Knowledge in the Biological Sciences |
| UTAS Author: | Shabala, S (Professor Sergey Shabala) |
| UTAS Author: | Pottosin, I (Professor Igor Pottosin) |
| ID Code: | 93066 |
| Year Published: | 2014 |
| Web of Science® Times Cited: | 196 |
| Deposited By: | Tasmanian Institute of Agriculture |
| Deposited On: | 2014-07-09 |
| Last Modified: | 2017-11-03 |
| Downloads: | 0 |
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