Phytochrome Modifies Blue-light-induced Electrical Changes in Corn Coleoptiles
- 1 September 1980
- journal article
- research article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 66 (3), 534-535
- https://doi.org/10.1104/pp.66.3.534
Abstract
Unilateral blue light administered to corn coleoptile segments produces no alteration of transmembrane potential on the light side, and only a small and slow hyperpolarization on the dark side. Red light causes a 5-15 mV depolarization in cells on the light side causes and somewhat smaller effects on the dark side. Blue given after red causes a rapid hyperpolarization on both sides of the coleoptile. The effect of the potentiating red preirradiation is probably due to phytochrome, being largely abolished by far-red given after red, but before the blue light. The effect of prior red irradiation decays in the dark, showing a half-time of about 45 min at room temperature. This rapid cooperativity between phytochrome and the phototropic pigment may indicate a common locale, possibly in a membrane.This publication has 8 references indexed in Scilit:
- Rapid Hormone-induced Hyperpolarization of the Oat Coleoptile Transmembrane PotentialPlant Physiology, 1977
- Phytochrome control of electrical potentials and intercellular coupling in oat-coleoptile tissuePlanta, 1976
- Red Light Enhancement of the Phototropic Response of Etiolated Pea StemsPlant Physiology, 1974
- Mineral Ion Contents and Cell Transmembrane Electropotentials of Pea and Oat Seedling TissuePlant Physiology, 1967
- The Physiological Versus the Spectrophotometric Status of Phytochrome in Corn ColeoptilesPlant Physiology, 1966
- A Kinetic Study of Growth Movements and Photomorphogenesis in Etiolated Pea SeedlingsAmerican Journal of Botany, 1964
- Measurements of Geoelectric and Anxin‐Induced Potentials in Coleoptiles with a Refined Vibrating Electrode TechniquePhysiologia Plantarum, 1964
- Comparative study of phototropic response & pigment content in oat & barley coleoptilesPlant Physiology, 1961