Circadian regulation of egg-laying behavior in fruit flies Drosophila melanogaster

Egg-laying rhythms in fruit flies may persist under constant light, unlike locomotor activity and adult emergence.

• The circadian clock in fruit flies is complex, with multi-oscillatory mechanisms identified in both central and peripheral neurons.
• Ventral lateral neurons in the fly brain are linked to locomotor activity and adult emergence, while antennal cells influence olfactory rhythm.
• The egg-laying rhythm of Drosophila is characterized by a circadian periodicity that exceeds 24 hours.
• Under constant darkness, egg-laying remains rhythmic, yet core clock genes period (per) and timeless (tim) do not oscillate in the ovaries.
• Current knowledge about the regulatory mechanisms of egg-laying behavior is limited, suggesting a need for further investigation.

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