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Effects of Tetraethylammoniumchloride (TEA), Vanadate, and Alkali Ions on the Lateral Leaflet Movement Rhythm of Desmodium Motorium (Houtt.) Merr

Effects of Tetraethylammoniumchloride (TEA), Vanadate, and Alkali Ions on the Lateral Leaflet Movement Rhythm of Desmodium Motorium (Houtt.) Merr

U Weber, W Engelmann, W E Mayer

Chronobiol Int. 1992 Aug;9(4):269-77.

PMID: 1423736

Abstract:

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.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP14644554	Cesium metavanadate		14644-55-4	Price

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