期刊
FEBS LETTERS
卷 588, 期 21, 页码 3918-3923出版社
WILEY
DOI: 10.1016/j.febslet.2014.09.003
关键词
SV channel; Choline; Glycine betaine; Proline; Salinity stress; Adaptation
资金
- CONACYT (Mexico) and Australian Research Council
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.
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