期刊
FRONTIERS IN PHYSIOLOGY
卷 11, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fphys.2020.00272
关键词
circadian clock; entrainment; photoperiodism; seasonality; chronotype; Arnold onion
类别
资金
- Deutsche Forschungsgemeinschaft (DFG) [SCH3362/2-1]
- Deutsche Forschungsgemeinschaft [TRR 186, SPP 2041]
- JSPS [16H01652, 16K08538]
- Taiwan Ministry of Science and Technology [107-2311-B-038-001-MY2, 107-2410-H-038-004-MY2, 108-2321-B006-023-MY2, 108-2410-H-038-008-MY2]
- Higher Education Sprout Project by the Ministry of Education (MOE) in Taiwan, Taipei Medical University [TMU107-AE1-B15]
- Taipei Medical University-Shuang Ho Hospital [107TMU-SHH-03]
- Grants-in-Aid for Scientific Research [16H01652, 16K08538] Funding Source: KAKEN
Entrainment denotes a process of coordinating the internal circadian clock to external rhythmic time-cues (Zeitgeber), mainly light. It is facilitated by stronger Zeitgeber signals and smaller period differences between the internal clock and the external Zeitgeber. The phase of entrainment psi is a result of this process on the side of the circadian clock. On Earth, the period of the day-night cycle is fixed to 24 h, while the periods of circadian clocks distribute widely due to natural variation within and between species. The strength and duration of light depend locally on season and geographic latitude. Therefore, entrainment characteristics of a circadian clock vary under a local light environment and distribute along geoecological settings. Using conceptual models of circadian clocks, we investigate how local conditions of natural light shape global patterning of entrainment through seasons. This clock-side entrainment paradigm enables us to predict systematic changes in the global distribution of chronotypes.
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