In vivo treatment of barley roots with vanadate increases vacuolar H+-translocating ATPase activity of the tonoplast-enriched membrane vesicles and the level of endogenous ABA

Minobu Kasai, Yoko Yamamoto, Hideaki Matsumoto

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    12 Citations (Scopus)

    Abstract

    Evidence for an increase in the activity of the vacuolar H+-translocating ATPase of barley roots, accompanied by qualitative change, in response to exogenously applied abscisic acid (ABA) has been reported previously [Kasai et al. (1993b) Plant Cell Physiol. 34: 1107]. In the present study, such an increase in the H+-translocating ATPase activity was shown to occur upon treatment of barley roots with vanadate. Furthermore, the level of endogenous ABA in the roots was shown to increase significantly as a result of this treatment. The present observations provide further support for the proposed physiological significance of cellular ABA in the regulation of the vacuolar H+-translocating ATPase activity.

    Original languageEnglish
    Pages (from-to)291-295
    Number of pages5
    JournalPlant and Cell Physiology
    Volume35
    Issue number2
    Publication statusPublished - 1994

    Keywords

    • Barley roots
    • Endogenous ABA
    • Vacuolar H+ pump
    • Vanadate

    ASJC Scopus subject areas

    • Physiology
    • Plant Science
    • Cell Biology

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