Effects of external KCl on electrical properties and K$(86Rb) transport in the elongating region of intact phaseolus mungo roots

Hideo Ishikawa, Keitaro Matsuura, Sadao Yamamura, Eiji Ohta, Makoto Sakata

研究成果: Article査読

3 被引用数 (Scopus)

抄録

Two simultaneous measurements, extracellular potential V and K$(86Rb) transport, and the intracellular potential of cortical cell E and potential V, were used to study the effects of external KCl on two-day-old bean roots. High, external KCl concentrations (>10 mm) markedly enhanced K$ loss from tissues in the elongating region to the external solution and induced depolarization of the membrane potential difference (PD=V-E).When Phaseolus roots were returned to a solution with a lower concentration of K$, the K$ loss and the potential difference, PD, were restored to their previous values. K$ transport from other parts of the root to the elongating region, however, did not recover, and the potential, E, increased. These results clearly demonstrate that treatment of Phaseolus roots with a high external K$ concentration inhibits K$ translocation through the stele to the elongating cortical cells and is dependent on depolarization of the intracellular potential.

本文言語English
ページ(範囲)359-365
ページ数7
ジャーナルPlant and Cell Physiology
25
3
出版ステータスPublished - 1984 4

ASJC Scopus subject areas

  • 生理学
  • 植物科学
  • 細胞生物学

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