The FV channel dominates the ion conductance of the vacuolar membrane at physiological Ca2+ concentrations. Patch-clamp measurements on whole barley (Hordeum vulgare) mesophyll vacuoles and on excised tonoplast patches showed small differences in a selectivity sequence NH4/+>K+≥Rb+≥Cs+>Na+>Li+. Less permeant cations decreased the open probability. The FV channel allows the uptake of small monovalent cations especially NH4/+ into the vacuole.
CITATION STYLE
Brüggemann, L. I., Pottosin, I. I., & Schönknecht, G. (1999). Selectivity of the fast activating vacuolar cation channel. Journal of Experimental Botany, 50(335), 873–876. https://doi.org/10.1093/jxb/50.335.873
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