2012 Fiscal Year Final Research Report
Studies on a novel eukaryotic assemblage containing haptophytes and cryptophytes: Possible impact on the Chromalveolata hypothesis.
| Project/Area Number |
21370031
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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 | University of Tsukuba |
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Principal Investigator |
INAGAKI Yuji 筑波大学, 生命環境系, 准教授 (50387958)
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| Co-Investigator(Kenkyū-buntansha) |
ISHIDA Ken-ichiro 筑波大学, 生命環境系, 教授 (30282198)
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| Project Period (FY) |
2009 – 2012
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| Keywords | 真核生物系統 / 葉緑体 / クロムアルベオラータ仮説 / 遺伝子水平移動 / 2 次共生 |
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| Research Abstract |
Recent studies proposed a novel monophyletic assemblage of two of major eukaryotic algal groups, haptophytes and cryptophytes, together with miscellaneous heterotrophic species. In this study, we conducted deep mRNA sequencing on heterotrophic members of the haptophyte + cryptophyte (H + C) assemblage including an enigmatic heterotrophic flagellate Palpitomonas bilix. By analyzing the mRNA sequence data, we addressed three issues described below;
(1) the diversity and detailed relationship between the phototrophic and heterotrophic members in H + C assemblage
(2) the evolution of photosynthesis and plastids in H + C assemblage, and
(3) the phylogenetic position of H + C assemblage in the tree of eukaryotes
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