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Choline but not its derivative betaine blocks slow vacuolar channels in the halophyte Chenopodium quinoa: Implications for salinity stress responses
journal contribution
posted on 2023-05-18, 07:03 authored by Pottosin, I, Bonales-Alatorre, E, Sergey ShabalaSergey ShabalaActivity 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.
History
Publication title
FEBS LettersVolume
588Issue
21Pagination
3918-3923ISSN
0014-5793Department/School
Tasmanian Institute of Agriculture (TIA)Publisher
Elsevier Science BvPlace of publication
Po Box 211, Amsterdam, Netherlands, 1000 AeRights statement
Copyright 2014 Federation of European Biochemical Societies. Published by Elsevier B.V.Repository Status
- Restricted