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Compatible solutes mitigate damaging effects of salt stress by reducing the impact of stress-induced reactive oxygen species

Citation

Cuin, TA and Shabala, SN, Compatible solutes mitigate damaging effects of salt stress by reducing the impact of stress-induced reactive oxygen species, Plant Signalling and Behavior , 3, (3) pp. 207-208. ISSN 1559-2316 (2008) [Refereed Article]

DOI: doi:10.4161/psb.3.3.4966

Abstract

Under abiotic stress conditions, rapid increases in reactive oxygen species (ROS) levels occurs within plant cells. Although their role as a major signalling agent in plants is now acknowledged, elevated ROS levels can result in an impairment of membrane integrity. Similar to our previous findings on imposition of salt stress, application of the hydroxyl radical (OH•) to Arabidopsis roots results in a massive efflux of K+ from epidermal cells. This is likely to cause significant damage to cell metabolism. Since K+ loss also occurs after salt application and salt stress leads to increased cellular ROS levels, we suggest that at least some of the detrimental effects of salinity is due to damage by its resulting ROS on K+ homeostasis. We also observed a comparative reduction in K+ efflux by compatible solutes after both oxidative and salt stress. Thus, we propose that under saline conditions, compatible solutes mitigate the oxidative stress damage to membrane transporters. Whether this amelioration is due to free-radical scavenging or by direct protection of transporter systems, warrants further investigation. ©2008 Landes Bioscience.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Plant Biology
Research Field:Plant Physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Winter Grains and Oilseeds
Objective Field:Wheat
Author:Cuin, TA (Dr Tracey Cuin)
Author:Shabala, SN (Professor Sergey Shabala)
ID Code:53873
Year Published:2008
Funding Support:Australian Research Council (DP0449856)
Deposited By:Agricultural Science
Deposited On:2009-01-16
Last Modified:2009-06-15
Downloads:0

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