Effects of periodic- and transient-osmotic stress on electric potentials in bean roots

Hideo Ishikawa, Shouji Abou, Eiji Ohta, Makoto Sakata

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Abstract

Intact bean (Phaseolus mungo) roots were subjected to periodic- and transient-osmotic stress by treatment with a solution of low water potential Ψ°. Both the intracellular potential, E, and the extracellular potential, V, were measured with a multimicrochamber system that combined intracellular microelectrodes and external electrodes. In elongating regions, Ψ° simultaneously affected potentials E and V. The response of E to Ψ° could be presented by a transfer function that included dead time and first order elements. These elements were consistent with the emergence of an electromotive force, produced by respiration, between the cortex and the stele in the elongating region.

Original languageEnglish
Pages (from-to)1129-1135
Number of pages7
JournalPlant and Cell Physiology
Volume24
Issue number6
Publication statusPublished - 1983 Sep 1

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Keywords

  • Electric potential
  • Elongating cell
  • Intact root
  • Osmotic stress
  • Phaseolus mungo

ASJC Scopus subject areas

  • Physiology
  • Plant Science
  • Cell Biology

Cite this

Ishikawa, H., Abou, S., Ohta, E., & Sakata, M. (1983). Effects of periodic- and transient-osmotic stress on electric potentials in bean roots. Plant and Cell Physiology, 24(6), 1129-1135.