Periodic Pattern of Electric Potential in <I>Chara</I> Internodal Cell

Kenshi Hayashi, Takanori Fujiyoshi, Kiyoshi Toko, Kaoru Yamafuji

研究成果: Contribution to journalArticle査読

抄録

A spatial pattern of the electric potential formed by a characean internodal cell is investigated experimentally. A multi-electrode measuring system is used to pursue the dynamic properties of the pattern. It is shown that periodic low-potential regions are formed after the entire transient increase over the cell when the light is imposed on. Under constant illumination an electric oscillation is found. These experimental data are also discussed by the use of a spectrum analysis; the formation of the pattern is a bifurcation phenomenon of soft-mode instability realizing far from equilibrium, accompanied by sharpening of spectrum of a particular wave mode. A long-range coherence extending over 1 cm is also shown to exist in the high-potential region, where protons are extruded by H<SUP>+</SUP>-ATPase molecules existing within the membrane.
本文言語英語
ページ(範囲)810-820
ページ数11
ジャーナルjournal of the physical society of japan
56
2
DOI
出版ステータス出版済み - 1987

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