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- Publisher
- Oxford University Press
- Copyright
- Copyright © 2021 American Society of Plant Biologists
- ISSN
- 0032-0889
- eISSN
- 1532-2548
- DOI
- 10.1104/pp.98.4.1494
- Publisher site
- See Article on Publisher Site
Abstract
Abstract Ion channels in tonoplast of leaf cells of a Crassulacean acid metabolism plant, Graptopetalum paraguayense, using the patch clamp technique were investigated. Results showed the existence of two types of channels involved in the malate ion transport across the tonoplast. One type corresponded to the slow-activating vacuolar-type (R Hedrich, E Neher [1987] Nature 329: 833-836), probably taking part in the malate efflux from vacuoles. Another showed the membrane potential-dependent channel current of malate flux over a wide range of cytoplasmic free Ca2+ concentration (10−8-10−5 molar), a property favoring the malate uptake. This type seems to be different from the fast-activating vacuolar-type. 1 This study was supported by grants-in-aid from the Ministry of Education, Science and Culture of Japan. This content is only available as a PDF. © 1992 American Society of Plant Biologists This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model)
Journal
Plant Physiology – Oxford University Press
Published: Apr 1, 1992