Rapid Hormone-induced Hyperpolarization of the Oat Coleoptile Transmembrane Potential
- 1 March 1977
- journal article
- research article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 59 (3), 395-397
- https://doi.org/10.1104/pp.59.3.395
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.This publication has 9 references indexed in Scilit:
- Fissure sealing of first permanent molars. An improved technique applied by a dental auxiliaryBritish Dental Journal, 1978
- Kinetics of Hormone-induced H+ ExcretionPlant Physiology, 1976
- Rapid stimulation of K+H+ exchange by a plant growth hormoneBiochemical and Biophysical Research Communications, 1976
- Transmembrane Electropotential in Barley Roots as Related to Cell Type, Cell Location, and Cutting and Aging EffectsPlant Physiology, 1976
- Auxin-Induced Hydrogen Ion Excretion from Avena ColeoptilesProceedings of the National Academy of Sciences, 1973
- Enhancement of Wall Loosening and Elongation by Acid SolutionsPlant Physiology, 1970
- Effect of Indole-3-acetic Acid on Membrane Potentials of Oat Coleoptile CellsPlant Physiology, 1970
- Timing of the Auxin Response in Coleoptiles and Its Implications Regarding Auxin ActionThe Journal of general physiology, 1969
- Transmembrane Potential Measurements of Cells of Higher Plants as Related to Salt UptakeScience, 1960