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Polyamines prevent NaCl-induced K+ efflux from pea mesophyll by blocking non-selective cation channels

Citation

Shabala, SN and Cuin, TA and Pottosin, Igor, Polyamines prevent NaCl-induced K+ efflux from pea mesophyll by blocking non-selective cation channels, FEBS Letters, 581, (10) pp. 1993-1999. ISSN 0014-5793 (2007) [Refereed Article]

DOI: doi:10.1016/j.febslet.2007.04.032

Abstract

Despite numerous reports implicating polyamines in plant salinity responses, the specific ionic mechanisms of polyamine-mediated adaptation to salt-stress remain elusive. In this work, we show that micromolar concentrations of polyamines are efficient in preventing NaCl-induced K+ efflux from the leaf mesophyll, and that this effect can be attributed to the inhibition of non-selective cation channels in mesophyll. The inhibition by externally applied polyamines developed slowly over time, suggesting a cytosolic mode of action. Overall, we suggest that elevated levels of cellular polyamine may modulate the activity of plasma membrane ion channels, improving ionic relations and assisting in a plant's adaptation to salinity. © 2007.

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:Horticultural Crops
Objective Field:Vegetables
Author:Shabala, SN (Professor Sergey Shabala)
Author:Cuin, TA (Dr Tracey Cuin)
ID Code:48794
Year Published:2007
Web of Science® Times Cited:75
Deposited By:Agricultural Science
Deposited On:2007-08-01
Last Modified:2009-09-22
Downloads:0

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