Distribution of PERIOD-immunoreactive neurons and temporal change of the immunoreactivity under long-day and short-day conditions in the larval brain of the flesh fly Sarcophaga similis |
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Authors: | Mizuho Yamamoto Sakiko Shiga |
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Institution: | Graduate School of Science, Osaka City University, Osaka, Japan |
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Abstract: | The flesh fly Sarcophaga similis show a clear photoperiodic response; they develop into adults under long days, whereas they arrest their development at the pupal stage under short days. Although the involvement of a circadian clock in photoperiodic time measurement is suggested in this species, the anatomical location of the clock neurons responsible for the time measurement has been unknown. We detected two PERIOD-immunoreactive cell clusters in the larval brain; one cluster was located at the dorsoanterior region and the other at the medial region. We further investigated their temporal changes in PERIOD-immunoreactivity and compared their patterns under different photoperiods. |
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Keywords: | Circadian clock neuron diapause external coincidence model insect PERIOD photoperiod photoperiodism Sarcophaga similis |
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