| Budget Amount *help |
¥44,980,000 (Direct Cost: ¥34,600,000、Indirect Cost: ¥10,380,000)
Fiscal Year 2022: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2021: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2020: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2019: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
Fiscal Year 2018: ¥21,580,000 (Direct Cost: ¥16,600,000、Indirect Cost: ¥4,980,000)
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| Outline of Final Research Achievements |
In species belonging to the family Syllidae in the phyum Annelida, mature individuals develop gonad in the posterior part of their body, where an ectopic head was newly formed. Then, the posterior body part filled with gonad detaches from the original body to swim and spawn eggs or sperms for sexual reproduction. This unique process of reproduction is called "stolonization", but the underlying developmental mechanism has yet to be elucidated. Therefore, in this research project, focusing on a Japanese green syllid Megasyllis nipponica, the rearing system was firstly established in the laboratory. Then, the detailed process of stolonization was investigated by using multiple analytical approaches, for example, by scanning electoron microscopy and confocal microscope. Based on the observation results, gene expression analyses were also carried out, revealing that some of the patterning genes are recruited for the formation of an ectopic heads.
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