2014 Fiscal Year Final Research Report
Chemotaxonomy using carotenoids and phylogenetic classification of algae
| Project/Area Number |
24570115
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Biodiversity/Systematics
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| Research Institution | Nippon Medical School |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | カロテノイド / 系統分類 / 藻類 / 紅色植物 / シアノバクテリア / α-カロテン |
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| Outline of Final Research Achievements |
Among prokaryotes, only two genera of cyanobacteria have α-carotene. α-Carotene had opposite chirality, (6′S) in Acaryochloris and normal (6′R) in Prochlorococcus. This is the first natural occurrence of (6′S)-α-carotene. All the zeaxanthin in these species were usual (3R,3′R)-chirality.
Carotenoid compositions in Rhodophyta are divers. Rhodophyta is divided into two groups, unicellular (Cyanidiophyceae, Porphyridiophyceae, Stylonematophyceae and Rhodellophyceae) and macrophytic algae (Compsopogonophyceae, Bangiophyceae and Florideophyceae). All of unicellular algae contained only β-carotene and zeaxanthin (ZEA-type). Compsopogonophyceae contained ZEA-type and additional antheraxanthin (ANT-type), while Bangiophyceae contained ZEA-type and additional α-carotene and lutein (LUT-type). Consequently, relation between carotenoid compositions and phylogenetics of Rhodophyta was found. Therefore, diverse carotenoid compositions can be explained presence or absence of the enzymes.
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| Free Research Field |
植物生理学
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