2009 Fiscal Year Final Research Report
Initiation of oocyte maturation by light cues in jellyfish
| Project/Area Number |
19570198
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Developmental biology
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| Research Institution | Miyagi University of Education |
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Principal Investigator |
DEGUCHI Ryusaku Miyagi University of Education, 教育学部, 准教授 (90302257)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 生殖細胞 / 卵母細胞 |
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| Research Abstract |
In the hydrozoan jellyfish Cladonema pacificum, there are two different groups in which spawning is triggered by different photic stimuli : light stimulation after dark (light type) and dark stimulation after light (dark type). This study revealed that the regional distribution, the photic conditions required for spawning, and the size of spawned eggs differ between the two types. The characteristics of the next generation produced in crossbreeding experiments suggest that the two types are caused by genetic factors. The present study also provides evidence that a neuropeptide(s) acts downstream of photoreception and appears essential for spawning in either type of C.pacificum.
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