Reactivated Triton-Extracted Models of <i>Paramecium</i> : Modification of Ciliary Movement by Calcium Ions

DOI Web Site 被引用文献21件
  • Yutaka Naitoh
    Zoological Institute, Faculty of Science, University of Tokyo, Tokyo, Japan
  • Hiroki Kaneko
    Zoological Institute, Faculty of Science, University of Tokyo, Tokyo, Japan

抄録

<jats:p> Triton-extracted models of <jats:italic>Paramecium</jats:italic> were reactivated to swim in solutions of adenosine triphosphate and magnesium ions. The cilia beat in the normal direction (toward the rear) when the calcium ion concentration was less than 10 <jats:sup>-6</jats:sup> <jats:italic>M</jats:italic> , and they beat in the "reversed" direction (toward the front) when calcium ion concentration was raised above 10 <jats:sup>-6</jats:sup> <jats:italic>M</jats:italic> . These results support the proposal that ciliary reversal, hence backward swimming, of live paramecia is mediated by an increased cytoplasmic calcium concentration around the ciliary system by calcium-dependent membrane responses to external stimuli. </jats:p>

収録刊行物

  • Science

    Science 176 (4034), 523-524, 1972-05-05

    American Association for the Advancement of Science (AAAS)

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