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Choline but not its derivative betaine blocks slow vacuolar channels in the halophyte Chenopodium quinoa: Implications for salinity stress responses

Citation

Pottosin, I and Bonales-Alatorre, E and Shabala, S, Choline but not its derivative betaine blocks slow vacuolar channels in the halophyte Chenopodium quinoa: Implications for salinity stress responses, FEBS Letters, 588, (21) pp. 3918-3923. ISSN 0014-5793 (2014) [Refereed Article]

Copyright Statement

Copyright 2014 Federation of European Biochemical Societies. Published by Elsevier B.V.

DOI: doi:10.1016/j.febslet.2014.09.003

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.

Item Details

Item Type:Refereed Article
Keywords:SV channel, choline, glycine betaine, proline, salinity stress, adaptation
Research Division:Biological Sciences
Research Group:Plant Biology
Research Field:Plant Physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Summer Grains and Oilseeds
Objective Field:Summer Grains and Oilseeds not elsewhere classified
Author:Bonales-Alatorre, E (Dr Edgar Bonales Alatorre)
Author:Shabala, S (Professor Sergey Shabala)
ID Code:98158
Year Published:2014
Web of Science® Times Cited:9
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2015-02-03
Last Modified:2017-11-02
Downloads:0

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