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

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)359-365
Number of pages7
JournalPlant and Cell Physiology
Volume25
Issue number3
Publication statusPublished - 1984 Apr

Fingerprint

electrical properties
Phaseolus
electrical property
Electrical Properties
Depolarization
Electric properties
Roots
stele
membrane potential
Membrane Potentials
beans
cells
Tissue
Membranes
Membrane Potential
Bean
Translocation
Cell
translocation
membrane

Keywords

  • Elongating region
  • Extracellular potential
  • Intracellular potential
  • Phaseolus
  • Potassium

ASJC Scopus subject areas

  • Statistics, Probability and Uncertainty
  • Applied Mathematics
  • Ecology
  • Cell Biology
  • Physiology
  • Plant Science

Cite this

Effects of external KCl on electrical properties and K$(86Rb) transport in the elongating region of intact phaseolus mungo roots. / Ishikawa, Hideo; Matsuura, Keitaro; Yamamura, Sadao; Ohta, Eiji; Sakata, Makoto.

In: Plant and Cell Physiology, Vol. 25, No. 3, 04.1984, p. 359-365.

Research output: Contribution to journalArticle

Ishikawa, Hideo ; Matsuura, Keitaro ; Yamamura, Sadao ; Ohta, Eiji ; Sakata, Makoto. / Effects of external KCl on electrical properties and K$(86Rb) transport in the elongating region of intact phaseolus mungo roots. In: Plant and Cell Physiology. 1984 ; Vol. 25, No. 3. pp. 359-365.
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