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Potassium transport and plant salt tolerance


Shabala, SN and Cuin, TA, Potassium transport and plant salt tolerance, Physiologia Plantarum , 133, (4) pp. 651-699. ISSN 0031-9317 (2008) [Refereed Article]

DOI: doi:10.1111/j.1399-3054.2007.01008.x


Salinity is a major abiotic stress affecting approximately 7% of the world's total land area resulting in billion dollar losses in crop production around the globe. Recent progress in molecular genetics and plant electrophysiology suggests that the ability of a plant to maintain a high cytosolic K+/Na+ ratio appears to be critical to plant salt tolerance. So far, the major efforts of plant breeders have been aimed at improving this ratio by minimizing Na+ uptake and transport to shoot. In this paper, we discuss an alternative approach, reviewing the molecular and ionic mechanisms contributing to potassium homeostasis in salinized plant tissues and discussing prospects for breeding for salt tolerance by targeting this trait. Major K+ transporters and their functional expression under saline conditions are reviewed and the multiple modes of their control are evaluated, including ameliorative effects of compatible solutes, polyamines and supplemental calcium. Subsequently, the genetic aspects of inheritance of K+ transport 'markers' are discussed in the general context of salt tolerance as a polygenic trait. The molecular identity of 'salt tolerance' genes is analysed, and prospects for future research and breeding are examined.

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:Grains and seeds
Objective Field:Wheat
UTAS Author:Shabala, SN (Professor Sergey Shabala)
UTAS Author:Cuin, TA (Dr Tracey Cuin)
ID Code:53870
Year Published:2008
Web of Science® Times Cited:773
Deposited By:Agricultural Science
Deposited On:2009-01-16
Last Modified:2015-02-04

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