Single potassium channels in membranes of isolated mesophyll barley vacuoles

Voltage-dependent K channels could be identified in on-cell and excised patch-clamp records on membranes of isolated plant cell vacuoles. The channel shows outward rectification, representing a cation flux into the vacuoles. The rectification appears to be caused by a vanishing open probability and...

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Bibliographic Details
Published in:The Journal of membrane biology 1987-01, Vol.95 (2), p.163-169
Main Authors: KOLB, H.-A, KÖHLER, K, MARTINOIA, E
Format: Article
Language:English
Subjects:
Biological and medical sciences
Cell physiology
Fundamental and applied biological sciences. Psychology
Hordeum vulgare
ion
iones
ions
Membrane and intracellular transports
mesofilo
mesophyll
mesophylle
Molecular and cellular biology
potasio
potassium
vacuola
vacuole
vacuoles
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Summary:Voltage-dependent K channels could be identified in on-cell and excised patch-clamp records on membranes of isolated plant cell vacuoles. The channel shows outward rectification, representing a cation flux into the vacuoles. The rectification appears to be caused by a vanishing open probability and a short channel lifetime at hyperpolarizing voltages. A selectivity ratio of potassium over sodium of about 6 was derived as an estimate.
ISSN:0022-2631
1432-1424
DOI:10.1007/BF01869161