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- W2000403937 abstract "Voltage‐dependent ionic channels were investigated by the patch‐clamp technique in the vacuolar membrane from the leaves of the seagrass Posidonia oceanica . Vacuoles extruded from the meristematic white part of the leaves displayed rectifying slow currents which activated in several seconds at positive potentials and deactivated at negative voltages within a few hundreds of ms. Like the S low V acuolar (SV) channel already identified in the tonoplast of terrestrial plants, the SV voltage‐dependent channel of Posidonia leaves was activated by micromolar concentrations of Ca 2+ and was equally permeable to K + and Na + . The single‐channel conductance of the Posidonia SV‐type channel was 106±12 pS (in symmetric 400 mM K + ). In the same ionic solutions, another channel, occasionally observed in vacuoles from the green part of the leaves, displayed a single‐channel conductance of 47±4 pS. To our knowledge, this is the first electrophysiological characterization of ion transport pathways in Posidonia , a marine plant of crucial importance for the ecology of the Mediterranean sea." @default.
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- W2000403937 date "1997-07-21" @default.
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- W2000403937 title "Ion channels in the vacuoles of the seagrass <i>Posidonia oceanica</i>" @default.
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- W2000403937 doi "https://doi.org/10.1016/s0014-5793(97)00786-2" @default.
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