2009 Fiscal Year Final Research Report
Molecular mechanisms controlling circadian rhythms and photoperiodism in insects
| Project/Area Number |
18380043
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Applied entomology
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| Research Institution | Kobe University |
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Principal Investigator |
TAKEDA Makio Kobe University, 大学院・農学研究科, 教授 (20171647)
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| Project Period (FY) |
2006 – 2009
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| Keywords | 光周性 / 概日振動 / メラトニン合成系 / 光受容 / 変態 / 休眠 / 表現型多型 |
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| Research Abstract |
Photoperiodism is an important biological mechanism and involved in agriculture production but its molecular mechanism remains obscure.
This study analyzed the structures, localization and dynamics of the elements involved in photoreception, circadian oscillation and endocrine switch to reconstruct the photoperiodic system. Comparative studies using different insects revealed a considerable flexibility in the circadian pacemaker structure and photoreceptor regarding to ontogenetic stages and phylogenetic lines. The important factor mediating photpoperiodic system seems to be the indolaminergic pathway, since the upstream regulatory region of N-acetyltransferase(NAT) that catalyze the production of melatonin has several E-boxes where transcription factors CLK/CYK binds, the cells secreting prothoracicotropic horone (PTTH) express melatonin receptor and all PER containing cells have NAT, and melatonin content and NAT transcript level show a circadian oscillation. These cells have the extraretinal photoreception.
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[Journal Article] Phosphorylation of small GTPase Rab proteins from Bombyx mori( Lepidoptera: Bombycidae)2009
Author(s)
Uno, T, Hata, K., Trang, L.T.D., Hiragaki, S., Nakada, T., Nakamura, M., Uno, Y., Yamagata, H., Kanamaru, K., Takeda, M., Matsubara M
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Journal Title
Eur. J. Entomol 106
Pages: 499-506
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[Journal Article] Molecular characterization and distribution of cycle protein from Athalia rosae.2007
Author(s)
Bembenek, J, Itokawa, K, Hiragaki, S., Shao, Q., M, Tufail, M., Takeda, M.
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Journal Title
J. Insect Physiol. 53
Pages: 418-427
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[Journal Article] Casein kinase I in the silkworm, Bombyx mori: Structure and possible roles in circadian timing and development.2006
Author(s)
Trang, L.T.D., Sehadova, H., Ichihara, N., Iwai, S., Mita, K., Takeda, M.
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Journal Title
J. Biol. Rhythms 21
Pages: 335-349
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[Journal Article] Effects of light quality and intensity on diapause induction in the two-spotted spider mite, Tetranychus urticae.
Author(s)
Suzuki, T., Fukunaga, Y., Amano, H., Takeda, M., Goto, E.
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Journal Title
Applied Entomology and Zoology (in press)
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[Journal Article] Molecular Structure of Insect Circadian Clock.
Author(s)
Trang, L.T.D., Shao, Q.-M., Takeda, K.
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Journal Title
Short Views on Insect Molecular Bioloy(Published by Insect Molecular Biology Unit, Bharathidasa Uni, India(Editors, Chandrasekar R, Krishnan, M)) (in press)
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