ArticlePhysiological entomology2016
Drosophila ezoana uses an hour-glass or highly damped circadian clock for measuring night length and inducing diapause.
Article in Physiological entomology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.
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15 citing papers in PubMed, 43 citations in OpenAlex.
- Phase response curve and RNA-sequencing demonstrate spiders' sensitivity to light and pinpoint candidate light-responsive genes.PloS one · 2026Article
- Correlation between circadian and photoperiodic latitudinal clines inOpen biology · 2025Article
- Characterization of pre-diapause phase in the northern Drosophila species D. ezoana.Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2024Article
- A clock for all seasons.Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2024Article
- 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.Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2024Article
- The seasons within: a theoretical perspective on photoperiodic entrainment and encoding.Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2024Review
- Time measurement in insect photoperiodism: external and internal coincidence.Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2024Review
- Variation in photoperiod response corresponds to differences in circadian light sensitivity in northern and southern Nasonia vitripennis lines.Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2024Article
- Adaptation and ecological speciation in seasonally varying environments at high latitudes:Fly · 2022Review
- A Comparative Study of Circadian Rhythmicity and Photoperiodism in Closely Related Species of Blow Flies: External Coincidence, Maternal Induction, and Diapause at Northern Latitudes.Journal of biological rhythms · 2021Review
- Locomotor activity patterns in three spider species suggest relaxed selection on endogenous circadian period and novel features of chronotype.Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2020Article
- Model and Non-model Insects in Chronobiology.Frontiers in behavioral neuroscience · 2020Review
- Peptidergic signaling from clock neurons regulates reproductive dormancy in Drosophila melanogaster.PLoS genetics · 2019Article
- The characterization of the circadian clock in the olive fly Bactrocera oleae (Diptera: Tephritidae) reveals a Drosophila-like organization.Scientific reports · 2018Article
- A damping circadian clock drives weak oscillations in metabolism and locomotor activity of aphids (Acyrthosiphon pisum).Scientific reports · 2017Article
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2 authors at 1 institution in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
Insects inhabiting the temperate zones measure seasonal changes in day or night length to enter the overwintering diapause. Diapause induction occurs after the duration of the night exceeds a critical night length (CNL). Our understanding of the time measurement mechanisms is continuously evolving subsequent to Bünning's proposal that circadian systems play the clock role in photoperiodic time measurement (Bünning, 1936). Initially, the photoperiodic clocks were considered to be either based on circadian oscillators or on simple hour-glasses, depending on 'positive' or 'negative' responses in Nanda-Hamner and Bünsow experiments (Nanda & Hammer, 1958; Bünsow, 1960). However, there are also species whose responses can be regarded as neither 'positive', nor as 'negative', such as the Northern Drosophila species Drosophila ezoana, which is investigated in the present study. In addition, modelling efforts show that the 'positive' and 'negative' Nanda-Hamner responses can also be provoked by circadian oscillators that are damped to different degrees: animals with highly sustained circadian clocks will respond 'positive' and those with heavily damped circadian clocks will respond 'negative'. In the present study, an experimental assay is proposed that characterizes the photoperiodic oscillators by determining the effects of non-24-h light/dark cycles (T-cycles) on critical night length. It is predicted that there is (i) a change in the critical night length as a function of T-cycle period in sustained-oscillator-based clocks and (ii) a fixed night-length measurement (i.e. no change in critical night length) in damped-oscillator-based clocks. Drosophila ezoana flies show a critical night length of approximately 7 h irrespective of T-cycle period, suggesting a damped-oscillator-based photoperiodic clock. The conclusion is strengthened by activity recordings revealing that the activity rhythm of D. ezoana flies also dampens in constant darkness.
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