Dependence of Phytochrome Action in Seeds on Membrane Organization
- 1 January 1978
- journal article
- research article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 61 (1) , 17-19
- https://doi.org/10.1104/pp.61.1.17
Abstract
Germination of Amaranthus retroflexus L. seeds imbibed at 40.degree. C is enhanced by establishing the active form of phytochrome before a reduction in temperature to < 32.degree. C. The half-time for effectiveness of the lower temperature is about 8 min at 15.degree. C. Isolated membrane fragments of A. retroflexus seeds associated with the fluorescent probe 1,8-anilino-naphthalene sulfonate (ANS) increase in structural order as the temperature is lowered through the 32.degree. C region. The germination response is decreased by the membrane-disruptive substances tris, octonoate and ethanol. The results show that phytochrome activity is associated with an organized membrane. By using ANS with membrane fragments from Setaria faberi Herrm. seeds, leakage of amino acid was enhanced at temperatures > 32.degree. C by a transition in the plasmalemma.This publication has 9 references indexed in Scilit:
- Model for action of local anaestheticsNature, 1976
- Variation in Germination and Amino Acid Leakage of Seeds with Temperature Related to Membrane Phase ChangePlant Physiology, 1976
- Effect of a phase transition on the binding of 1-anilino-8-naphthalenesulfonate to phospholipid membranesBiophysical Journal, 1976
- Thermotropic lipid clustering in tetrahymena membranesBiochemistry, 1975
- Reversible redistribution of phytochrome within the cell upon conversion to its physiologically active form.Proceedings of the National Academy of Sciences, 1975
- Membrane-surfactant Interactions in Lipid Micelles Labeled with l-Anilino-8-naphthalenesulfonatePlant Physiology, 1974
- Changes in Phytochrome Expressed by Germination of Amaranthus retroflexus L. SeedsPlant Physiology, 1971
- The function of phytochrome in regulation of plant growth.Proceedings of the National Academy of Sciences, 1967
- Plant-growth Inhibition by some Fatty Acids and their AnaloguesNature, 1964