Cell biological study on the origin of male and female sex in eukaryotes
| Project/Area Number |
15K14579
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Evolutionary biology
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| Research Institution | University of Tsukuba |
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Principal Investigator |
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| Project Period (FY) |
2015-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | 性 / 進化 / 配偶子 / 緑色植物 / 細胞構造 |
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| Outline of Final Research Achievements |
In order to elucidate the origin and evolution of two sexes, male and female, which is found in many eukaryotes, we focused on the sex-specific arrangement of the cell fusion site of the gamete in chlorophyte algae and analyzed its molecular mechanism and ecological significance. As for the molecular mechanism, we tried to isolate mutants of green alga Chlamydomonas, but it was not possible to find a target mutant. Regarding ecological significance, as a result of the observations of the fine structure, flagellar movement, eye size of planozygotes and zoospores of marine green alga Chaetomorpha, it is suggested that sex-specific arrangement of the cell fusion site has evolved as a result of adaptation to the environment of the habitat.
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| Academic Significance and Societal Importance of the Research Achievements |
多くの真核生物と同じ様にヒトもオスとメス、２つの性をもち、それが社会の基盤になっている。しかしながら、ヒトも含めたオスとメス、２つの性の起源と進化については不明な点が多い。本研究で明らかになった２つの性を区別する配偶子の細胞学的特徴とその生態学的な意義は、２つの性と起源についての手がかりを与える意義があると考えられる。
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Report
(5 results)
Research Products
(20 results)
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[Journal Article] Mother cell wall cleavage during filament formation in Stichococcus bacillaris (Tebouxiophyceae, Chlorophyta)2016
Author(s)
Yamamoto, M., Handa, S., Kawachi, M., Miyamura, S., Nagumo, T., Hirata, A and Kawano, S.
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Journal Title
Cytologia
Volume: 81
Pages: 35-39
Related Report
Peer Reviewed
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[Journal Article] Effects of micro wet milling and vacuum spray drying on the physicochemical and antioxidant properties of orange (Citrus unshiu) juice with pulp powder2016
Author(s)
Islam, M.Z., Kitamura, Y., Kokawa, M., Monakisa, K., Tsai, F-H. and Miyamura, S.
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Journal Title
Food and Bioproducts Processing
Volume: 101
Pages: 132-144
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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