ATP-Dependent Calcium Transport in Plasmalemma Preparations from Soybean Hypocotyls
Open Access
- 1 January 1982
- journal article
- research article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 69 (1) , 187-191
- https://doi.org/10.1104/pp.69.1.187
Abstract
A plasmalemma-enriched membrane preparation from etiolated soybean (Glycine max L., cv. Wayne) hypocotyls possesses an active ATP-dependent calcium pump which leads to calcium accumulation when assayed by the methods of Gross and Marmé (1978, Proc Natl Acad Sci USA 75: 1232-1236). Two-hour treatment of segments from the elongating zone of the hypocotyl with growth-promoting concentrations of indoleacetic acid gives up to 100 percent increase in the calcium transport activity. Conversely, similar pretreatment with zeatin or other cytokinins is inhibitory. In the meristematic and maturing zones of the hypocotyl, zeatin has the opposite effect of promoting calcium transport activity. One facet of cell-growth regulation may lie with hormonally mediated changes in efflux pumping of calcium.This publication has 10 references indexed in Scilit:
- Characterization of Soybean Plasma Membrane during DevelopmentPlant Physiology, 1980
- Inhibition of Adenosine Triphosphatase Activity of the Plasma Membrane Fraction of Oat Roots by DiethylstilbestrolPlant Physiology, 1979
- ATP-dependent Ca 2+ uptake into plant membrane vesiclesProceedings of the National Academy of Sciences, 1978
- Evolution and Function of Calcium-Binding ProteinsPublished by Elsevier ,1976
- Separation of two responses to auxin by means of cytokinin inhibition.Proceedings of the National Academy of Sciences, 1975
- [36] Purification of a plasma membrane-bound adenosine triphosphatase from plant rootsPublished by Elsevier ,1974
- Mineral Ion Contents and Cell Transmembrane Electropotentials of Pea and Oat Seedling TissuePlant Physiology, 1967
- Relation of 2,4-D-Induced Growth Aberrations to Changes in Nucleic Acid Metabolism in Soybean SeedlingsBotanical Gazette, 1966
- Effect of External K, NH4, Na, Ca, Mg, and H Ions on the Cell Transmembrane Electropotential of Avena ColeoptilePlant Physiology, 1964
- Some effects of 2,4-dichlorophenoxyacetic acid on soluble nucleotides & nucleic acid of soybean seedlingsPlant Physiology, 1961