Modulation of Ca〔2+〕 Influx into a Single Rice Cell with an Electric Signal

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  • SAITO Mikako
    Department of Biotechnology, Tokyo University of Agriculture and Technology
  • KOSAI Yuri
    Department of Biotechnology, Tokyo University of Agriculture and Technology
  • MATSUOKA Hideaki
    Department of Biotechnology, Tokyo University of Agriculture and Technology

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タイトル別名
  • Modulation of Ca<sup>2+</sup> Influx into a Single Rice Cell with an Electric Signal
  • Modulation of Ca 2 Influx into a Single Rice Cell with an Electric Signal

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<p>A pulsing electric signal was applied to a target rice cell with a pair of Pt plate electrodes to modulate the Ca2+ influx into the cells. The change of intracellular concentration of Ca2+ was measured continuously. The cross membrane potential (|VCMP|) generated at the cell membrane was analyzed on the basis of the measured data of potential gradient at the very position of the cell. When |VCMP| was no higher than 1.0 mV, no appreciable influx of Ca2+ was observed. In contrast, when |VCMP| was higher than 1.9 mV, a marked increase in the Ca2+ influx occurred. This influx was inhibited by verapamil, a Ca2+ channel blocker, which suggested the involvement of Ca2+ channel. Therefore, the Ca2+ influx into a rice cell can be modulated with a pulsing electric signal via potential sensitive Ca2+ channels.</p>

収録刊行物

  • Electrochemistry

    Electrochemistry 68 (5), 333-336, 2000-05-05

    公益社団法人　電気化学会

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