Electrical Membrane Properties and Circadian Rhythm in Extensor Cells of the Laminar Pulvini of Phaseolus coccineus L.
- 1 May 1980
- journal article
- research article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 65 (5), 966-968
- https://doi.org/10.1104/pp.65.5.966
Abstract
Circadian changes of 3 parameters of electrical properties in extensor cells of the laminar pulvini of P. coccineus L. were recorded by standard microelectrode techniques. In the low turgor state of the cells, the resting potential and the CN- (1 mM NaCN) induced depolarizations are large, while the K+-induced voltage changes are small, and vice versa in the high turgor state. During a circadian cycle the low turgor state of the extensor cells is correlated with the active state of an electrogenic pump. This correlation can be explained by electroosmosis.Keywords
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