| Project/Area Number |
15H06834
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Evolutionary biology
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| Research Institution | National Institute of Genetics |
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Principal Investigator |
Onuma Ryo 国立遺伝学研究所, 細胞遺伝研究系, 博士研究員 (80756825)
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| Project Period (FY) |
2015-08-28 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | 盗葉緑体 / 細胞内共生 / 渦鞭毛藻 / クリプト藻 / Nusuttodinium |
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| Outline of Final Research Achievements |
Dinoflagellate Nusuttodinium aeruginosum possesses kleptochloroplast stolen from cryptomonad. To investigate molecular mechanism of kleptochloroplastidy, we compared transcriptomes of cryptomonad as free-living cell and as ingested form. The analysis showed that the ingested nucleus remained active and suggested that the activities of photosynthesis and nitrogen assimilation were retained. In contrast, expressions of cell cycle-related genes were decreased, implying that the cell cycle of the ingested cryptomonad was not progressed.
In addition, prior to study on mechanism of kleptochloroplast division, we investigate mechanisms of regulation of chloroplast division in cryptophyte Guillardia theta. Nucleomorph-encoded genes/proteins that are related to nucleomorph replication and chloroplast division were constantly expressed throughout the cell cycle, suggesting that the timing of chloroplast division is regulated by as-yet-unidentified gene/protein that encoded in the nucleus.
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