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. 1977 Mar;59(3):395–397. doi: 10.1104/pp.59.3.395

Rapid Hormone-induced Hyperpolarization of the Oat Coleoptile Transmembrane Potential 1

Robert E Cleland a,2, Hidde B A Prins a,3, James Ronald Harper a, Noe Higinbotham a
PMCID: PMC542411  PMID: 16659860

Abstract

The effects of the plant growth substances indoleacetic acid (IAA) and fusicoccin on the transmembrane potential of Avena coleoptile cells (at 27-29 C) were studied. Fusicoccin caused hyperpolarization of the membrane potential which started after a lag of less than 20 seconds, and which on average reached −49 mv at an external K+ concentration of 1 mm and −75 mv at 0.1 mm K+. IAA caused a hyperpolarization of −25 mv starting after a lag of 7 to 8 minutes. These results suggest that fusicoccin and IAA both activate electrogenic H+ extrusion.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Cleland R. E. Kinetics of Hormone-induced H Excretion. Plant Physiol. 1976 Aug;58(2):210–213. doi: 10.1104/pp.58.2.210. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Cleland R. E. Rapid stimulation of K -H exchange by a plant growth hormone. Biochem Biophys Res Commun. 1976 Mar 22;69(2):333–338. doi: 10.1016/0006-291x(76)90526-x. [DOI] [PubMed] [Google Scholar]
  3. Cleland R. Auxin-induced hydrogen ion excretion from Avena coleoptiles. Proc Natl Acad Sci U S A. 1973 Nov;70(11):3092–3093. doi: 10.1073/pnas.70.11.3092. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. ETHERTON B., HIGINBOTHAM N. Transmembrane potential measurements of cells of higher plants as related to salt uptake. Science. 1960 Feb 12;131(3398):409–410. doi: 10.1126/science.131.3398.409. [DOI] [PubMed] [Google Scholar]
  5. Etherton B. Effect of Indole-3-acetic Acid on Membrane Potentials of Oat Coleoptile Cells. Plant Physiol. 1970 Apr;45(4):527–528. doi: 10.1104/pp.45.4.527. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Evans M. L., Ray P. M. Timing of the auxin response in coleoptiles and its implications regarding auxin action. J Gen Physiol. 1969 Jan;53(1):1–20. doi: 10.1085/jgp.53.1.1. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. Mertz S. M., Higinbotham N. Transmembrane electropotential in barley roots as related to cell type, cell location, and cutting and aging effects. Plant Physiol. 1976 Feb;57(2):123–128. doi: 10.1104/pp.57.2.123. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Rayle D. L., Cleland R. Enhancement of wall loosening and elongation by Acid solutions. Plant Physiol. 1970 Aug;46(2):250–253. doi: 10.1104/pp.46.2.250. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Stephen K. W., Kirkwood M., Young K. C., Gillespie F. C., MacFadyen E. E., Campbell D. Fissure sealing of first permanent molars. An improved technique applied by a dental auxiliary. Br Dent J. 1978 Jan 3;144(1):7–10. doi: 10.1038/sj.bdj.4804019. [DOI] [PubMed] [Google Scholar]

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