Plant Physiol.
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Plant Physiology 81:919-921 (1986)
© 1986 American Society of Plant Biologists

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Membrane Operational Impedance Spectra in Chara corallina Estimated by Laplace Transforms Analysis 1

Fabrice Homblé2 and André Jenard

Laboratoire Thermodynamique Electrochimique, Université Libre de Bruxelles, Faculté des Sciences CP 160, Av. F. Roosevelt, 50, B-1050 Brussels, Belgium, Laboratoire Physiologie Végétale, Université Libre de Bruxelles, Faculté des Sciences CP 160, Av. F. Roosevelt, 50, B-1050 Brussels, Belgium

The membrane operational impedance spectrum of Chara corallina Klein ex Willd. (R. Brown) cells is investigated using Laplace transform analysis. The spectrum changes with both amplitude and sign of the electrical stimulation when time- and voltage-dependent K+ channels contribute to the membrane conductance. We compare the advantages and disadvantage of this technique for studying membrane impedance with those of the alternating current method and the white noise method.

2 Present address: Department of Botany, University of Toronto, Toronto, Ontario M5S 1A1, Canada.

1 Supported by the National Fund for Scientific Research and the Fund for Joint Basic Research.






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ASPB Publications PLANT PHYSIOLOGY THE PLANT CELL
Copyright © 1986 by the American Society of Plant Biologists