| Project/Area Number |
05454063
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
蚕糸・昆虫利用学
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| Research Institution | Iwate University |
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Principal Investigator |
SUZUKI Koichi Iwate University, Agriculture, Associate Professor, 農学部, 助教授 (20003791)
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| Co-Investigator(Kenkyū-buntansha) |
TANIGUCHI Kazuyuki Iwate University, Agriculture, Professor, 農学部, 教授 (70148089)
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| Project Period (FY) |
1993 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥6,800,000 (Direct Cost: ¥6,800,000)
Fiscal Year 1994: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1993: ¥5,400,000 (Direct Cost: ¥5,400,000)
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| Keywords | Pharate first-instar larva / Diapause control / Repressive factor / Maturation factor / Hormone structure / Antheraea yamamai / 前幼虫態休眠 / 免疫組織化学 |
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| Research Abstract |
We have examined the structure and function of two hormones controlling diapause of pharate first-instar in the wild silkmoth, Antheraea yamamai. Consequently, we obtained some significant results as follows :
1.Repressive factor (RF) localized in the region of mesothorax is lost by the stimulus of chilling for long period as well as in the application of KK-42.
2.Maturation factor (MF) is not identical with eclosion hormone according to the immunohistochemical analysis.
3.We established a new method of bioassay for MF and purified partially this hormone.
4.We found that MF activity is also present in the hemolymph of 5th instar larvae besides pre-larvae.
5.We indicated that RF and MF are new peptide hormones in insect and they are not different with FXPRLamide family.
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