1994 Fiscal Year Final Research Report Summary
Structure and function of hormones controlling diapause of pharate first-instar larvae in the wild silkmoth, Antheraea yamamai.
| Project/Area Number |
05454063
|
|---|
| Research Category |
Grant-in-Aid for General Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
蚕糸・昆虫利用学
|
|---|
| Research Institution | Iwate University |
|---|
Principal Investigator |
SUZUKI Koichi Iwate University, Agriculture, Associate Professor, 農学部, 助教授 (20003791)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
TANIGUCHI Kazuyuki Iwate University, Agriculture, Professor, 農学部, 教授 (70148089)
|
|---|
| Project Period (FY) |
1993 – 1994
|
| Keywords | Pharate first-instar larva / Diapause control / Repressive factor / Maturation factor / Hormone structure / Antheraea yamamai |
|---|
| 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.
|
