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Plant Physiology 79:1021-1025 (1985)
© 1985 American Society of Plant Biologists

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Articles

Membrane Electrical Noise in Chara corallina1

I. A Low Frequency Spectral Component

Stephen Ross2 and Jack Dainty

Department of Botany, University of Toronto, Toronto, Ontario, Canada M5S 1A1

Some aspects of the membrane physiology of the giant-celled alga Chara corallina have been studied using the techniques of membrane noise analysis. Cellular voltage noise was measured by means of a microelectrode inserted in the vacuole of the cell. The significant feature of spectra estimated from voltage noise signals in these cells was a low-frequency component possibly associated with the active, electrogenic proton pumping which occurs in these cells. The effect of high external pH is described.

2 Present address: M.R.C. Group in Periodontal Physiology, Room 4384 Medical Sciences Building, University of Toronto, Toronto, Ontario, Canada M5S 1A8.

1 Funded by a grant from the Natural Sciences and Engineering Research Council (NSERC), and S. Ross was supported by an NSERC Postgraduate Scholarship and an Ontario Graduate Scholarship.






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Copyright © 1985 by the American Society of Plant Biologists