Origin and evolution of a sex determination region in the chromosome: the lineage of primitive marine multicellular-algae, the family Ulvaceae
Project/Area Number |
17H03705
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Morphology/Structure
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Research Institution | The University of Tokyo |
Principal Investigator |
Kawano Shigeyuki 東京大学, フューチャーセンター推進機構, 特任研究員 (70161338)
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Co-Investigator(Kenkyū-buntansha) |
宮村 新一 筑波大学, 生命環境系, 准教授 (00192766)
桑野 和可 長崎大学, 水産・環境科学総合研究科(水産), 教授 (60301363)
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Project Period (FY) |
2017-04-01 – 2020-03-31
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Project Status |
Completed (Fiscal Year 2019)
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Budget Amount *help |
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2019: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2018: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2017: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
|
Keywords | ゲノム / 交配型 / 雌雄性 / アオノリ / 非対称性 / 性決定領域 / Ulva partita / Ulva prolifera / 母性遺伝 / 同形配偶子接合 / 微生物・藻類形態 |
Outline of Final Research Achievements |
Ulva partita and U. prolifera, which belong to the class Ulvophyceae, have evolved their male and female gametes slightly from homomorphic to heteromorphic. When our eyes are turned to the unique trait of left-right asymmetry from the quantitative but fluctuate trait as a size, the positions of the eyespot and the conjugation device are reversed in males and females. There is such a left-right asymmetry even before the difference in size between males and females. Does sex mean this asymmetry? Is it related to the maternal inheritance of organelles? We approached the origin and evolution of sex determination by using the mating type (MT) region revealed by genome analysis.
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Academic Significance and Societal Importance of the Research Achievements |
アオサやアオノリはふりかけ海苔などに加工されることもあって日本人には馴染み深い。海でこれらの海藻を手に取って見ると、細胞が二層膜状に並んだものと一層チューブ状のものとがあり、前者をアオサ、後者をアオノリと呼んでいる。細胞が二層か一層かで食感や香りに大きな違いが生じる。一方、海水の富栄養化などが原因で、アオサやアオノリが大量繁殖すると緑潮(グリーンタイド)となる。2008年の北京五輪セーリングコースに押し寄せた大量の海藻は記憶に新しい。その原因は冨栄養化だけでなく、アオサやアオノリが性を喪失し不稔化するところが大きいことがわかってきている。それは本研究の主要テーマに直結することでもある。
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Report
(4 results)
Research Products
(39 results)
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[Journal Article] The <i>Parachlorella</i> Genome and Transcriptome Endorse Active RWP-RK, Meiosis and Flagellar Genes in Trebouxiophycean Algae2019
Author(s)
Ota, S., Oshima, K., Yamazaki, T., Takeshita, T., Bisova, K., Zachleder, V., Hattori, M. and Kawano, S.
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Journal Title
CYTOLOGIA
Volume: 84
Issue: 4
Pages: 323-330
DOI
NAID
ISSN
0011-4545, 1348-7019
Year and Date
2019-12-25
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Ultrafast simultaneous Raman-fluorescence spectroscopy.2019
Author(s)
Lindley, M., Hiramatsu, K., Nomoto, H., Shibata, F., Takeshita, T., Kawano, S. and Goda, K.
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Journal Title
Anal. Chem.
Volume: 91
Pages: 15563-15563
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Independent regulation of the lipid and starch synthesis pathways by sulfate metabolites in the green microalga Parachlorella kessleri under sulfur starvation conditions.2018
Author(s)
Yamazaki, T., Konosu, E., Takeshita, T., Hirata, A., Ota, S., Kazama, Y., Abe, T., Kawano, S.
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Journal Title
Algal Res.
Volume: 36
Pages: 37-47
DOI
Related Report
Peer Reviewed
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[Journal Article] Comparison of lipid productivity of Parachlorella kessleri heavy-ion beam irradiation mutant PK4 in laboratory and 150-L mass bioreactor, identification and characterization of its genetic variation.2018
Author(s)
Takeshita, T., Ivanov, I. N., Oshima, K., Ishii, K., Kawamoto, H., Ota, S., Yamazaki, T., Hirata, A., Kazama, Y., Abe, T., Hattori, M., Bisova, K., Zachleder, V. and Kawano, S.
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Journal Title
Algal Res.
Volume: 35
Pages: 416-426
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Presentation] Endopolyploidy, fragmentation and reconstitution of chromosomes by the heavy-ion beam irradiation in Parachlorella kessleri2017
Author(s)
S.Kawano, M.Asano, K.Ishii, Y.Kazama, T.Abe, T.Takeshita, S.Ota, T.Yamazaki, K.Bisova, V.Zachleder
Organizer
BioTech 2017 and 7th Czech-Swiss Symposium with Exhibition
Related Report
Int'l Joint Research / Invited
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