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 Lühring, H.
Right arrow Articles by Tazawa, M.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Lühring, H.
Right arrow Articles by Tazawa, M.
Agricola
Right arrow Articles by Lühring, H.
Right arrow Articles by Tazawa, M.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Plant and Cell Physiology, 1985, Vol. 26, No. 4 769-774
© 1985

Short Communication

Cytoplasmic Ca2+ has No Effect on the Excitability of Chara Plasmalemma

Hinrich Lühring1 and Masashi Tazawa

Department of Botany, Faculty of Science, University of Tokyo Hongo, Tokyo 113, Japan

Internodal cells of Chara australis were subjected to two consecutive intracellular perfusions with a Ca2+-free EGTA medium which disintegrated the tonoplast within about 10 minutes and then with a Ca2+-buffered medium. All perfusion media usually contained 1 mM ATP. To stop the electrogenic pump, the internode was depleted of intracellular ATP. The excitability of the plasmalemma was not significantly influenced by intracellular free Ca2+ concentrations up to 10–4 M. To trigger action potentials, minimum current densities of 1 to 2 µA cm–2 had to be applied at all tested Ca2+ concentrations. In the absence of cytoplasmic ATP, excitability was completely lost at all Ca2+ concentrations.

1 Present address: Botanisches Institut der Universität Bonn, Venusbergweg 22, D-5300 Bonn, FRG.

(Received September 22, 1984; Accepted March 6, 1985)
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
E. Johannes, A. Crofts, and D. Sanders
Control of Cl- Efflux in Chara corallina by Cytosolic pH, Free Ca2+, and Phosphorylation Indicates a Role of Plasma Membrane Anion Channels in Cytosolic pH Regulation
Plant Physiology, September 1, 1998; 118(1): 173 - 181.
[Abstract] [Full Text]


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.