Effects of external Ca2+ on K+ permeability of the elongating region of mung bean roots under high KCl stress

Kotaro Oka, Hideo Ishikawa, Eiji Ohta, Makoto Sakata

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Simultaneous measurements of the extracellular potential and the K+(86Rb) efflux, and of the intracellular and extracellular potentials of the cortical cells were used to study the effects of external Ca2+ on the plasma membrane K+(86Rb) permeability in two-day-old mung bean (Vigna mungo L. Hepper, 'Black matpe') roots under high KCl stress. The K+ efflux was enhanced by a high KCl solution (>7.5 mm), and addition of 0.5 mm Ca2+ could suppress this efflux. The removal of membrane-associated Ca+ from the root surface with EDTA led to a recovery of the K+ efflux along with a marked decrease in the extracellular potential.

Original languageEnglish
Pages (from-to)581-586
Number of pages6
JournalPlant and Cell Physiology
Volume28
Issue number4
Publication statusPublished - 1987 Jun

Keywords

  • Calcium
  • Electric potential
  • Elongating region (root)
  • Potassium stress
  • Vigna mungo

ASJC Scopus subject areas

  • Physiology
  • Plant Science
  • Cell Biology

Fingerprint Dive into the research topics of 'Effects of external Ca<sup>2+</sup> on K<sup>+</sup> permeability of the elongating region of mung bean roots under high KCl stress'. Together they form a unique fingerprint.

Cite this