Abstract
The circadian pacemaker synchronizes to the Earth's rotation by tracking step-by-step changes in illumination that occur as the sun passes the horizon. While twilight progressions of irradiance and colour are considered important stimuli in this process, comparably less thought has been given to the possibility that ultraviolet A (UVA) radiation might actually play a more formative role given its evolutionary significance in shaping 24 h timekeeping. Here, we show that Drosophila activity rhythms can be phase-shifted by UVA light at an energy range seated well below that of the visible spectrum. Because the energy threshold for this resetting matches the incident amount of UVA on the human retina at twilight, our results suggest that UVA light has the potential to function as a similar time cue in people.
Original language | English (US) |
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Article number | 20181288 |
Journal | Proceedings of the Royal Society B: Biological Sciences |
Volume | 285 |
Issue number | 1884 |
DOIs | |
State | Published - Aug 15 2018 |
Keywords
- Circadian
- Light
- Photostimulation
- Rhythms
- Ultraviolet
ASJC Scopus subject areas
- General Biochemistry, Genetics and Molecular Biology
- General Immunology and Microbiology
- General Environmental Science
- General Agricultural and Biological Sciences
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Supplementary material from "The circadian activity rhythm is reset by nanowatt pulses of ultraviolet light"
Negelspach, D. C. (Creator), Kaladchibachi, S. (Contributor) & Fernandez, F. (Creator), figshare, 2018
DOI: 10.6084/m9.figshare.c.4166705.v1, https://figshare.com/collections/Supplementary_material_from_The_circadian_activity_rhythm_is_reset_by_nanowatt_pulses_of_ultraviolet_light_/4166705/1
Dataset
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Raw phase-shifting data from The circadian activity rhythm is reset by nanowatt pulses of ultraviolet light
Negelspach, D. C. (Creator), Kaladchibachi, S. (Contributor) & Fernandez, F. (Creator), The Royal Society, 2018
DOI: 10.6084/m9.figshare.6820826.v1, https://rs.figshare.com/articles/Raw_phase-shifting_data_from_The_circadian_activity_rhythm_is_reset_by_nanowatt_pulses_of_ultraviolet_light/6820826/1
Dataset
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Supplementary material from "The circadian activity rhythm is reset by nanowatt pulses of ultraviolet light"
Negelspach, D. C. (Creator), Kaladchibachi, S. (Contributor) & Fernandez, F. (Creator), figshare, 2018
DOI: 10.6084/m9.figshare.c.4166705, https://figshare.com/collections/Supplementary_material_from_The_circadian_activity_rhythm_is_reset_by_nanowatt_pulses_of_ultraviolet_light_/4166705
Dataset