An oscillatory component of propagated fluctuation electric potential in lupine shoot

Zygmunt Hejnowicz, Andrzej Pijanowski, Krzysztof Głębicki

Abstract


Application of a drop of auxin solution to a cut surface on the petiole in lupine shoot elicits a travelling pulse of electric potential decrease. This pulse was simultaneously recorded by means of a DC amplifier and band-pass amplifier 0.1-100 Hz, both connected to the same exploring AgCl electrode driven into the stem. The DC record shows a pulse 20-80 mV in height of about 30 s duration at its height with smooth slopes. The band-pass amplifier shows one to a few pairs of spikes (negative and positive) whose amplitude is at least of an order lower than that of the DC pulse. These spikes are interpreted as the action potential of certain excitable cells recorded in a "volume conductor". The pulse is interpreted as a wave of cooperative depolarization of excitable and a mass of inexcitable cells.

Keywords


action potential; oscrillatory component; Lupinus spp.

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DOI: https://doi.org/10.5586/asbp.1986.007

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