Article AddendumCa2+ signatures The role of Ca 2+-ATPases

Enas Qudeimat, Wolfgang Frank

    Research output: Contribution to journalArticle

    Abstract

    Calcium ions (Ca2+) are well known signaling molecules in plant signal transduction pathways including the response to abiotic stress. Particular stimuli cause specific transient elevations in cytosolic Ca 2+ ([Ca2+]cyt) with a stimulus-dependent amplitude and temporal pattern. These Ca2+ transients, known as Ca2+ signatures, rely on the counteractive activities of Ca 2+-permeable channels and Ca2+-transporting proteins. Whereas the channels causing an increase in [Ca2+]cyt were partly identified, direct evidence for the role of Ca2+-transporting proteins in the determination of Ca2+ signatures was missing. We recently reported on the functional characterization of a stress-responsive PIIB-type Ca2+-ATPase (PCA1) from the moss Physcomitrella patens. This study revealed an essential role of this Ca2+ pump in the adjustment of salt stress tolerance. Most strikingly, the generation of a specific Ca2+ signature in response to salt was abolished in Physcomitrella mutant lines lacking PCA1 activity. Thus, we can provide a direct link for the function of a Ca2+-ATPase in the generation of a specific Ca2+ signature in plants.

    Original languageEnglish (US)
    Pages (from-to)350-352
    Number of pages3
    JournalPlant Signaling and Behavior
    Volume4
    Issue number4
    StatePublished - Apr 1 2009

    Fingerprint

    adenosinetriphosphatase
    Physcomitrella
    Physcomitrella patens
    pumps
    stress tolerance
    abiotic stress
    salt stress
    mosses and liverworts
    signal transduction
    proteins
    ions
    salts
    calcium
    mutants

    Keywords

    • Abiotic stress
    • Ca-ATPase
    • Calcium signaling
    • Gene expression
    • Physcomitrella patens
    • Small vacuole

    ASJC Scopus subject areas

    • Plant Science

    Cite this

    Article AddendumCa2+ signatures The role of Ca 2+-ATPases. / Qudeimat, Enas; Frank, Wolfgang.

    In: Plant Signaling and Behavior, Vol. 4, No. 4, 01.04.2009, p. 350-352.

    Research output: Contribution to journalArticle

    Qudeimat, E & Frank, W 2009, 'Article AddendumCa2+ signatures The role of Ca 2+-ATPases', Plant Signaling and Behavior, vol. 4, no. 4, pp. 350-352.
    Qudeimat, Enas ; Frank, Wolfgang. / Article AddendumCa2+ signatures The role of Ca 2+-ATPases. In: Plant Signaling and Behavior. 2009 ; Vol. 4, No. 4. pp. 350-352.
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