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.
journal_name
FEBS Lettjournal_title
FEBS lettersauthors
Pottosin I,Bonales-Alatorre E,Shabala Sdoi
10.1016/j.febslet.2014.09.003subject
Has Abstractpub_date
2014-11-03 00:00:00pages
3918-23issue
21eissn
0014-5793issn
1873-3468pii
S0014-5793(14)00678-4journal_volume
588pub_type
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