| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Outline of Final Research Achievements |
Marine hydrozoan jellyfish, Clytia hemisphaerica, induces oocyte maturation and spawning daily in response to changes in light condition (from dark to light). In this study, we found several features of neuropeptides as potential maturation-inducing hormones.
Neuropeptides are derived from precursor genes in Clytia ovary. The mesh-like networks of neuropeptide-positive neurons appear in ovarian ectodermal epithelium before the initiation of oocyte maturation. The neuropeptides are released from them in response to light stimulus. Finally, we obtained the time course and timing of accumulation of neuropeptides after the previous spawning.
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