Drosophila ezoana uses morning and evening oscillators to adjust its rhythmic activity to different daylengths but only the morning oscillator to measure night length for photoperiodic responses

Animals living at high latitudes are exposed to prominent seasonal changes to which they need to adapt to survive. By applying Zeitgeber cycles of different periods and photoperiods we show here that high-latitude D. ezoana flies possess evening oscillators and highly damped morning oscillators that...

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Bibliographic Details
Published in:Journal of Comparative Physiology 2024-07, Vol.210 (4), p.535-548
Main Authors: Vaze, Koustubh M., Manoli, Giulia, Helfrich-Förster, Charlotte
Format: Article
Language:English
Subjects:
Animal Physiology
Animals
Biomedical and Life Sciences
Circadian rhythm
Circadian Rhythm - physiology
CLOCK protein
Diapause
Drosophila - physiology
Drosophila Proteins - genetics
Drosophila Proteins - metabolism
Evening
Insects
Latitude
Life Sciences
Light
Morning
Neurons - physiology
Neurosciences
Night
Oscillators
Photoperiod
Photoperiods
Physiology
Proteins
Seasonal variations
Zoology
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Summary:Animals living at high latitudes are exposed to prominent seasonal changes to which they need to adapt to survive. By applying Zeitgeber cycles of different periods and photoperiods we show here that high-latitude D. ezoana flies possess evening oscillators and highly damped morning oscillators that help them adapting their activity rhythms to long photoperiods. In addition, the damped morning oscillators are involved in timing diapause. The flies measure night length and use external coincidence for timing diapause. We discuss the clock protein TIMELESS (d-TIM) as the molecular correlate and the small ventrolateral clock neurons (s-LN v s) as the anatomical correlates of the components measuring night length.
ISSN:0340-7594
1432-1351
1432-1351
DOI:10.1007/s00359-023-01646-6