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Plant and Cell Physiology Advance Access originally published online on February 10, 2006
Plant and Cell Physiology 2006 47(4):559-562; doi:10.1093/pcp/pcj018
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Short Communication

Electrical Perception of the ‘Death Message’ in Chara: Characterization of K+-induced Depolarization

Teruo Shimmen*

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

* Correspondence: Email, shimmen{at}sci.u-hyogo.ac.jp; Fax, +81-791-58-0175.

When the nodal end of an internodal cell of Chara corallina was subjected to a pulse treatment with artificial cell sap, a depolarization lasted in artificial pond water. This depolarization could also be induced by pulse treatment with KCl solution, indicating that K+ in the artificial cell sap is responsible (K+-induced depolarization). The depolarization was prolonged in the presence of 2 mM KCl and the prolonged depolarization was terminated by supplementing with either CaCl2, MgCl2 or NaCl. These results supported the hypothesis that K+ released from the killed cell is responsible for generation of the wound-induced membrane depolarization.

(Received December 14, 2005; Accepted January 31, 2006)
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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.
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