Skip Navigation

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Tsutsui, I.
Right arrow Articles by Kishimoto, U.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Tsutsui, I.
Right arrow Articles by Kishimoto, U.
Agricola
Right arrow Articles by Tsutsui, I.
Right arrow Articles by Kishimoto, U.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Plant and Cell Physiology, 1986, Vol. 27, No. 6 1197-1200
© 1986

Short Communication

Inhibition of Cl– Channel Activation in Chara corallina Membrane by Lanthanum Ion

Izuo Tsutsui, Taka-aki Ohkawa, Reiko Nagai and Uichiro Kishimoto

Department of Biology, College of General Education, Osaka University Toyonaka 560, Osaka, Japan

We examined a role of Ca2+ in the activation of the two major ion channels, i.e., Cl– and K+ channels at the excitation of the characean plasmalemma. The current-voltage relation (I-V curve) of the Chara membrane was compared under the ramp voltage clamp condition before and after external application of 20µM of La3+ (a Ca2+ channel blocker). The transient inward current component, which is carried mainly by the efflux of Cl–, disappeared almost completely in about 30 min with La3+ treatment. On the other hand, no effect was observed on the late large outward current, which is mainly carried by the efflux of K+ in a large depolarization region (less negative than –50 mV). These results suggest that the Cl– channel in the Chara plasmalemma is activated by Ca2+ influx, while the K+ channel is simply activated by depolarization.

(Received April 7, 1986; Accepted June 6, 1986)
Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 Plant Physiol.Home page
S. Lautner, T. E. E. Grams, R. Matyssek, and J. Fromm
Characteristics of Electrical Signals in Poplar and Responses in Photosynthesis
Plant Physiology, August 1, 2005; 138(4): 2200 - 2209.
[Abstract] [Full Text] [PDF]


Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.