Molecular pieces to the puzzle of the interaction between potassium and sodium uptake in plants

Schachtman, D. and Liu, W. (1999) Molecular pieces to the puzzle of the interaction between potassium and sodium uptake in plants. Trends in Plant Science, 4 (7). pp. 281-287.

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Potassium uptake is vital for plant growth but in saline soils sodium competes with potassium for uptake across the plasma membrane of plant cells. This can result in high Na+:K+ ratios that reduce plant growth and eventually become toxic. Our understanding of the molecular basis underlying the interaction between essential potassium and toxic sodium was limited until the recent cloning and electrophysiological characterization of several genes encoding different types of molecules that are involved in K+ and Na+ transport. These molecules, and their regulation, are important in determining the K+:Na+ homeostasis of plants in saline soils, although it is not yet known which is most critical in determining the K+:Na+ ratios in whole plants.

Item Type: Article
Additional Information: We thank Rana Munns, Alison Karley, Jain-Kang Zhu, Mark Thomas and the anonymous reviewers for their critical comments. Thanks to John Bennett for kindly providing the unpublished O. sativa HKT1 protein sequence
Uncontrolled Keywords: Biochemistry; Cell biology; Plant biology
Author Affiliation: CSIRO Plant Industry – Horticulture Unit, GPO Box 350, Glen Osmond, SA 5064, Australia
Subjects: Plant Protection
Plant Physiology and Biochemistry > Plant Physiology
Divisions: General
Depositing User: Mr Balakrishna Garadasu
Date Deposited: 25 May 2013 14:56
Last Modified: 25 May 2013 14:56
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