Photoperiodism and Circadian Rhythms: An Hypothesis
- 1 July 1974
- journal article
- Published by Oxford University Press (OUP) in BioScience
- Vol. 24 (7) , 407-414
- https://doi.org/10.2307/1296912
Abstract
An hypothesis is presented that biological time measurement involves two independent master clocks. Each involves an endogenous circadian rhythm, one rephased and entrained by the light-on signal (dawn clock) and the other by the light-off signal (dusk clock). Photoperiodism and other phenomena are discussed in relation to these.Keywords
This publication has 15 references indexed in Scilit:
- The Participation of Two Rhythms in the Leaf Movements of Xanthium Plants Given Various Light-Dark CyclesPlant Physiology, 1974
- Biological Rhythms in Terrestrial ArthropodsAnnual Review of Entomology, 1970
- INTERACTIONS BETWEEN LIGHT AND CIRCADIAN RHYTHMS IN PLANT PHOTOPERIODISMPhotochemistry and Photobiology, 1969
- Rhythmic Processes in PlantsAnnual Review of Plant Physiology, 1968
- Control of Flowering of Xanthium pensylvanicum by Red and Far-red LightPlant Physiology, 1967
- Effect of Double Red Light Interruptions on the Photoperiodic Response of Pharbitis nilPlant Physiology, 1965
- Studies on Red Light Interruption in Relation to Timing Mechanisms Involved in the Photoperiodic Response of Pharbitis nilPlant Physiology, 1965
- Effect of Temperature and Preconditioning on Photoperiodic Response of Pharbitis nilPlant Physiology, 1964
- Investigations on the effect of „light break” on the nature of the endogenous rhythm in the flowering response of Biloxi soybean (Glycine, Max, L. merr.)Planta, 1962
- PHOTOPERIODIC INDUCTION OF DIAPAUSE IN AN INSECTThe Biological Bulletin, 1962