Light Induced Polarity of Redox Reactions in Leaves of Elodea canadensis Michx

J. Theo M. Elzenga*, Hidde B. A. Prins

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review


    This paper reports that extracellular reductase activity in leaves of Elodea canadensis, hitherto never associated with polar processes thought to be involved in bicarbonate utilization, also shows a very marked polarity in light. The effect of ferricyanide, applied to the lower side of illuminated leaves, was a depolarization of the membrane electrical potential of up to 110 millivolts, while no depolarization was induced when ferricyanide was applied to the upper side. In the dark ferricyanide induced a depolarization when applied to either the upper or to the lower side of the leaf. Staining with tetrazolium salts, specific indicators for reductase activity, resulted in the formation of a precipitate on the lower side of the leaf when illuminated and on both sides in the dark. The precipitate was only located along the plasmalemma
    Original languageEnglish
    Pages (from-to)239-242
    Number of pages4
    JournalPlant Physiology
    Issue number1
    Publication statusPublished - Sep-1987

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