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Publication Type J
Authors Pottosin, I., E. Bonales-Alatorre and S. Shabala
Title Choline but not its derivative betaine blocks slow vacuolar channels in the halophyte Chenopodium quinoa: Implications for salinity stress responses
Source Febs Letters
Author Keywords SV channel Choline Glycine betaine Proline Salinity stress Adaptation induced potassium efflux compatible solutes quaternary ammonium salt stress plants tolerance glycinebetaine tonoplast cations leaves
Abstract Activity of tonoplast slow vacuolar (SV, or TPC1) channels has to be under a tight control, to avoid undesirable leak of cations stored in the vacuole. This is particularly important for salt-grown plants, to ensure efficient vacuolar Na+ sequestration. In this study we show that choline, a cationic precursor of glycine betaine, efficiently blocks SV channels in leaf and root vacuoles of the two chenopods, Chenopodium quinoa (halophyte) and Beta vulgaris (glycophyte). At the same time, betaine and proline, two major cytosolic organic osmolytes, have no significant effect on SV channel activity. Physiological implications of these findings are discussed. (C) 2014 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
ISSN 0014-5793
ISBN 0014-5793
29-Character Source Abbreviation FEBS Lett.
Publication Date Nov
Year Published 2014
Volume 588
Issue 21
Beginning Page 3918-3923
Digital Object Identifier (DOI) 10.1016/j.febslet.2014.09.003
Unique Article Identifier WOS:000344075400019
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