Plant and Cell Physiology Advance Access originally published online on September 9, 2008
Plant and Cell Physiology 2008 49(10):1614-1620; doi:10.1093/pcp/pcn136
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Involvement of Membrane Potential in Alkaline Band Formation by Internodal Cells of Chara corallina
Department of Life Science, Graduate School of Life Science, University of Hyogo, Harima Science Park City, Hyogo, 678-1297 Japan
*Corresponding author: E-mail, shimmen{at}sci.u-hyogo.ac.jp; Fax, +81-791-58-0175.
| Abstract |
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Internodal cells of Chara corallina form alkaline bands on their surface upon illumination via photosynthesis. In the present study, the effect of KCl on alkaline band formation was analyzed. When the extracellular KCl concentration was increased, alkaline band formation was extensively inhibited. Electrophysiological analysis unequivocally showed the need for inner negative membrane potential for alkaline band formation.
Keywords: Alkaline band - Chara - Depolarization - K+ - Membrane potential - Photosynthesis
Abbreviations: APW, artificial pond water; BFS, band formation solution; Em, membrane potential.
(Received July 19, 2008; Accepted September 2, 2008)
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