Effect of decreasing electrical resistance in Characeae cell membranes caused by the flow of alternating current

Edward Śpiewla, Małgorzata Tokarska-Schlattner

Abstract


By means of the techniques of external electrodes and microelectrodes, it was found that evanescent flow of an alternating current through plasmalemma of Characeae cells neutralises oscillatory change in their electrical resistance and reversibly diminishes its value. This effect is particularly significant in the case of "high resistance cells", but it weakens with increasing temperature. The value of the estimated activation energy indicates that, after flow of the alternating current through the membrane, a rapid increase in the conductivity may be caused by an increase in conductivity of potassium channels. This result seems to support the hypothesis of electroconformational feedback.

Keywords


Characeae; resistance changes; oscillations; Arrhenius plots

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DOI: https://doi.org/10.5586/asbp.1994.036

Journal ISSN:
  • 2083-9480 (online)
  • 0001-6977 (print; ceased since 2016)
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Publisher
Polish Botanical Society