| Project/Area Number |
23370046
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Biodiversity/Systematics
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| Research Institution | Fisheries Research Agency |
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Principal Investigator |
KUWATA Akira 独立行政法人水産総合研究センター, その他部局等, 主任研究員 (40371794)
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| Co-Investigator(Kenkyū-buntansha) |
SATO Naoki 東京大学, 総合文化研究科, 教授 (40154075)
SAIYO Kenji 水産総合研究センター, 中央水産研究所, グループ長 (80371798)
YOSHIKAWA Shinya 福井県立大学, 海洋生物資源学部, 講師 (20405070)
SAWADA Ken 北海道大学, 理学研究科, 准教授 (20333594)
大城 香 福井県立大学, 海洋生物資源学部, 教授 (90101104)
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| Co-Investigator(Renkei-kenkyūsha) |
ICHINOMIYA Mutsuo 熊本県立大学, 環境共生学部, 講師 (30601918)
KAWACHI Masanobu 国立環境研究所, 生物生態系研究センター, 室長 (50260469)
OHKI Kaori 福井県立大学, 海洋生物資源学部, 名誉教授 (90101104)
NAKAMURA Youji 水産総合研究センター, 中央水産研究所, 研究員 (90463182)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥18,590,000 (Direct Cost: ¥14,300,000、Indirect Cost: ¥4,290,000)
Fiscal Year 2013: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2012: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2011: ¥9,750,000 (Direct Cost: ¥7,500,000、Indirect Cost: ¥2,250,000)
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| Keywords | 藻類 / 進化 / 珪藻 / 海洋生物学 / ゲノム / パルマ藻 / プランクトン / 分類 / 海洋生態 |
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| Research Abstract |
Parmales are an unknown small marine phytoplankton group with a silicified cell wall. Based on similarities in cell wall structure, Parmales has been proposed as a close relative of diatoms, the most successful microalgal group in modern oceans, and may play a key role in understanding their origin of silica cell wall and early evolution, which have not yet been clearly established. Recently, we isolated the first ever culture of Parmales in the Oyashio region of Japan. Molecular phylogenetic analysis of this culture indicated that Parmales was within the bolidophycean clade of autotrophic naked flagellates and a sister group of diatoms. We have studied on Parmales using ecological, physiological, genomic and biogeochemical approaches and analyzed their phylogenetic relationship between Bolidophycea and diatoms, chloroplast and mitochondria genomes, silica cell wall formation process, population dynamics in the Oyashio region, life cycle and specific biomarkers (molecular fossils).
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