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Potassium-selective channel in the red beet vacuolar membrane
Igor I Pottosin1, Manuel Martínez-Estévez, Oxana R Dobrovinskaya
1Centro Universitario de Investigaciones Biomedicas, Universidad de Colima, 28047 Colima, Col., México. pottosin@cgic.ucol.mx
Journal of Experimental Botany
|January 30, 2003
Abstract:
In higher plants the vacuolar K(+)-selective (VK) channel was identified solely in guard cells. This patch-clamp study describes a 40 pS homologue of the VK channel in Beta vulgaris taproot vacuoles. This voltage-independent channel is activated by submicromolar Ca(2+), and is ideally selective for K(+) over Cl(-) and Na(+).