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 journalArticle

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

Fingerprint

Mung Bean
Ethylenediaminetetraacetic acid
Cell membranes
mung beans
Permeability
permeability
Roots
membrane
Membranes
calcium
Recovery
Vigna mungo
Plasma Membrane
EDTA
Edetic Acid
plasma membrane
Membrane
Cell Membrane
plasma
Decrease

Keywords

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

ASJC Scopus subject areas

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

Cite this

Effects of external Ca2+ on K+ permeability of the elongating region of mung bean roots under high KCl stress. / Oka, Kotaro; Ishikawa, Hideo; Ohta, Eiji; Sakata, Makoto.

In: Plant and Cell Physiology, Vol. 28, No. 4, 06.1987, p. 581-586.

Research output: Contribution to journalArticle

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