Skip Navigation



Plant and Cell Physiology Advance Access published online on September 9, 2005
Plant and Cell Physiology, doi:10.1093/pcp/pci200
This Article
Right arrow Advance Access manuscript (PDF)
Right arrow All Versions of this Article:
46/11/1839    most recent
pci200v1
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 Similar articles in PubMed
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 Shimmen, T.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Shimmen, T.
Agricola
Right arrow Articles by Shimmen, T.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Plant and Cell Physiology 2005 © The Japanese Society of Plant Physiologists (JSPP); all rights reserved.
Received March 31, 2005
Accepted September 4, 2005

Regular Paper

Electrical Perception of "Death Message" in Chara: Analysis of K+-Sensitive Depolarization

Teruo Shimmen 1*

1 Department of Life Science, Graduate School of Life Science, University of Hyogo, Harima Science Park City, Hyogo 678-1297, Japan

* To whom correspondence should be addressed.
Teruo Shimmen, E-mail: shimmen{at}sci.u-hyogo.ac.jp


  Abstract

Wounding electrical responses were studied in Chara corallina. Specimens comprising two adjoining internodal cells were prepared. When one cell (victim cell) was cut, the other cell (receptor cell) generated four kinds of depolarization: (1) rapid depolarization, (2) long-lasting depolarization, (3) action potentials and (4) small spikes (Shimmen (2002) Plant & Cell Physiol. 43: 1575-1584). In the present study, attention was focused on the long-lasting depolarization. Decrease in the electrical resistance suggested activation of ion channel(s). The duration of the depolarization was sensitive to the external ions. K+ significantly prolonged the depolarization. On the other hand, Ca2+, Mg2+ and Na+ had a tendency to shorten the duration prolonged by K+. When a nodal end was continuously flushed with a medium lacking K+, the depolarization was significantly shortened. Treatment of the nodal end with artificial cell sap for 2 min induced a long-lasting depolarization similar as that induced by cutting the victim cell. These findings suggested the involvement of K+ released from the victim cell in generating the long-lasting depolarization by the receptor cell.

Keywords: Chara; Death message; Depolarization; Membrane potential; K+; Ion channel; Wounding response.
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 Cell PhysiolHome page
T. Shimmen
Electrophysiological Characterization of the Node in Chara corallina: Functional Differentiation for Wounding Response
Plant Cell Physiol., February 1, 2008; 49(2): 264 - 272.
[Abstract] [Full Text] [PDF]

Home page
 Plant Cell PhysiolHome page
T. Shimmen
Electrical Perception of the 'Death Message' in Chara: Characterization of K+-induced Depolarization
Plant Cell Physiol., April 1, 2006; 47(4): 559 - 562.
[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.