The physiological role of the slow vacuolar (SV) channel in vacuoles from higher plant cells, was analyzed. The SV channel was found to be dependent on gating and voltage, permeable to both monovalent and to divalent cations, and displayed a main conductance which depended on potassium concentration. The functional properties of the channel suggested an implication in a calcium-induced calcium-released mechanism based on the channel's calcium dependent activation and calcium permeability. Another hypotheses that was made was the channel's involvement in the homeostasis of cytosolic potassium on the basis of its gating properties, and its involvement in the Na+ storage inside the vacuole.
A perspective on the slow vacuolar channel in vacuoles from higher plant cells
Carpaneto A.
2005-01-01
Abstract
The physiological role of the slow vacuolar (SV) channel in vacuoles from higher plant cells, was analyzed. The SV channel was found to be dependent on gating and voltage, permeable to both monovalent and to divalent cations, and displayed a main conductance which depended on potassium concentration. The functional properties of the channel suggested an implication in a calcium-induced calcium-released mechanism based on the channel's calcium dependent activation and calcium permeability. Another hypotheses that was made was the channel's involvement in the homeostasis of cytosolic potassium on the basis of its gating properties, and its involvement in the Na+ storage inside the vacuole.
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