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On a quest for stress tolerance genes: membrane transporters in sensing and adapting to hostile soils
Citation
Shabala, S and Bose, J and Fuglsang, AT and Pottosin, I, On a quest for stress tolerance genes: membrane transporters in sensing and adapting to hostile soils, Journal of Experimental Botany, 67, (4) pp. 1015-1031. ISSN 0022-0957 (2016) [Refereed Article]
Copyright Statement
© The Author 2015. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved.
Abstract
Abiotic stresses such as salinity, drought, and flooding severely limit food and fibre production and result in penalties
of in excess of US$100 billion per annum to the agricultural sector. Improved abiotic stress tolerance to these environmental
constraints via traditional or molecular breeding practices requires a good understanding of the physiological and molecular
mechanisms behind roots sensing of hostile soils, as well as downstream signalling cascades to effectors mediating plant adaptive
responses to the environment. In this review, we discuss some common mechanisms conferring plant tolerance to these three
major abiotic stresses. Central to our discussion are: (i) the essentiality of membrane potential maintenance and ATP production/availability
and its use for metabolic versus adaptive responses; (ii) reactive oxygen species and Ca2+ ‘signatures’ mediating stress signalling; and (iii) cytosolic K+ as the common denominator of plant adaptive responses. We discuss in detail how key plasma membrane and tonoplast transporters
are regulated by various signalling molecules and processes observed in plants under stress conditions (e.g. changes in membrane
potential; cytosolic pH and Ca2+; reactive oxygen species; polyamines; abscisic acid) and how these stress-induced changes are related to expression and activity
of specific ion transporters. The reported results are then discussed in the context of strategies for breeding crops with
improved abiotic stress tolerance. We also discuss a classical trade-off between tolerance and yield, and possible avenues
for resolving this dilemma.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | breeding, drought, exchangers, flooding, H+-ATPase, ion channels, membrane potential, NAPHX oxidase, potassium homeostatis, pumps, pyrophosphatase, reactive oxygen species, salinity, voltage gating |
| 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 Environmental Sciences |
| UTAS Author: | Shabala, S (Professor Sergey Shabala) |
| UTAS Author: | Bose, J (Dr Jayakumar Bose) |
| UTAS Author: | Pottosin, I (Professor Igor Pottosin) |
| ID Code: | 107581 |
| Year Published: | 2016 |
| Web of Science® Times Cited: | 47 |
| Deposited By: | Tasmanian Institute of Agriculture |
| Deposited On: | 2016-03-18 |
| Last Modified: | 2017-11-02 |
| Downloads: | 0 |
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