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  Comparing behavior and clock gene expression between caterpillars, butterflies, and moths

Niepoth, N., Ke, G., de Roode, J. C., & Groot, A. T. (2018). Comparing behavior and clock gene expression between caterpillars, butterflies, and moths. Journal of Biological Rhythms, 33(1), 52-64. doi:10.1177/0748730417746458.

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Niepoth, Natalie, Author
Ke, Gao, Author
de Roode, Jacobus C., Author
Groot, Astrid T.1, Author              
Affiliations:
1Department of Entomology, Prof. D. G. Heckel, MPI for Chemical Ecology, Max Planck Society, ou_421895              

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 Abstract: Circadian behavior is widely observed in insects; however, the mechanisms that drive its evolution remain a black box. While circadian activity rhythms are well characterized in adults within the order Lepidoptera (i.e., most butterfly species are day active, while most moths are night active), much less is known about daily activity and clock gene expression in the larval stage. Additionally, direct comparison of clock gene expression between day-active and night-active species reared together has not been quantified. Our study characterized the daily rhythms of caterpillar feeding and activity in addition to the gene expression of 2 central circadian clock genes, period (per) and timeless (tim), in larvae and adults of the day-active butterfly Danaus plexippus and the night-active moth Heliothis virescens. We found that neither Danaus nor Heliothis caterpillars are strictly diurnal or nocturnal like their adult counterparts; however, we found that slight rhythms in feeding and activity can arise in response to external forces, such as temperature and host plant. Expression levels differed between genes, between butterfly larvae and adults, and between butterfly and moth species, even though expression levels of both per and tim oscillated with a similar phase over 24 hours across all treatments. Our study, the first of its kind to investigate circadian timekeeper gene expression in 2 life stages and 2 species, highlights interesting differences in core clock gene expression patterns that could have potential downstream effects on circadian rhythms.

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 Dates: 20172017-12-262018-02
 Publication Status: Published in print
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 Identifiers: Other: HEC385
DOI: 10.1177/0748730417746458
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Title: Journal of Biological Rhythms
  Other : J. Biol. Rhythms
Source Genre: Journal
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Publ. Info: Sage Publications, Inc.
Pages: - Volume / Issue: 33 (1) Sequence Number: - Start / End Page: 52 - 64 Identifier: ISSN: 0748-7304
CoNE: https://pure.mpg.de/cone/journals/resource/954925543214