Effects of Tetraethylammoniumchloride (TEA), Vanadate, and Alkali Ions on the Lateral Leaflet Movement Rhythm of Desmodium motorium (Houtt.) Merr
| Autor: | Wolfgang Engelmann, Ulrike Weber, W. E. Mayer |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Activity Cycles
Physiology Desmodium Movement Analytical chemistry Cesium Lithium Rhythm Physiology (medical) Pulvinus Vanadate Channel blocker Plant Physiological Phenomena Ultradian rhythm Alkali ions Valinomycin Leaflet (botany) Dose-Response Relationship Drug biology Chemistry Sodium Tetraethylammonium Cations Monovalent Hydrogen-Ion Concentration Plants Tetraethylammonium Compounds Rubidium biology.organism_classification Circadian Rhythm Biochemistry Potassium Vanadates |
| Zdroj: | Chronobiology International. 9:269-277 |
| ISSN: | 1525-6073 0742-0528 |
| DOI: | 10.3109/07420529209064537 |
| Popis: | The period (approximately 3-5 min) of the ultradian rhythm of the lateral leaflet movement of Desmodium motorium is strongly lengthened (less than or equal to 30-40%) by the K+ channel blocker tetraethylammoniumchloride (20, 30, and 40 mM) and vanadate (0.5 and 1 mM), which is an effective inhibitor of the plasma membrane-bound H+ pump. The alkali ions K+, Na+, Rb+, and Cs+ (10-40 mM) shorten the period only slightly (less than or equal to 10-15%). Li+ (5-30 mM), however, increases the period of the leaflet rhythm drastically (less than or equal to 80%). We concluded that the plasmalemma-H(+)-ATPase-driven K+ transport through K+ channels is an essential component of the ultradian oscillator of Desmodium, as has been proposed for the circadian oscillator. |
| Databáze: | OpenAIRE |
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