Voltage-dependent K channels in protoplasts of trap-lobe cells of Dionaea muscipula

T. Iijima, S. Hagiwara

    Research output: Contribution to journalArticlepeer-review

    42 Citations (Scopus)

    Abstract

    The outward rectification of the K+ current in mesophyll cell protoplasts from trap-lobes of Dionaea muscipula was studied with the patch-clamp technique. The rectification had instantaneous and time-dependent components. Changes in [K+]i strongly affected the conductance voltage relation of the plasma membrane while changes in [K+]o had little effect on the relation. Thus, the outward rectification depends on the membrane voltage and the concentration of intracellular K+. Corresponding single-channel activities were observed both in the intact membrane (cell-attached recording) and in excised patches. The single-channel conductance was about 3.3 pS with symmetrical solutions containing 30 mm K+.

    Original languageEnglish
    Pages (from-to)73-81
    Number of pages9
    JournalThe Journal of Membrane Biology
    Volume100
    Issue number1
    DOIs
    Publication statusPublished - 1987 Dec 1

    Keywords

    • K current
    • Venus's-flytrap
    • protoplast
    • rectification
    • single channel

    ASJC Scopus subject areas

    • Biophysics
    • Physiology
    • Cell Biology

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