Potassium-selective channel in the red beet vacuolar membrane |
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| Authors: | Pottosin Igor I Martínez-Estévez Manuel Dobrovinskaya Oxana R Muñiz Jesús |
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| Institution: | Centro Universitario de Investigaciones Biomedicas, Universidad de Colima, 28047 Colima, Col., México. pottosin@cgic.ucol.mx |
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| 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(+). |
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