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Species of the Parasitic Genus Duboscquella are Members of the Enigmatic Marine Alveolate Group I

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タイトル: Species of the Parasitic Genus Duboscquella are Members of the Enigmatic Marine Alveolate Group I
著者: Harada, Ai 著作を一覧する
Ohtsuka, Susumu 著作を一覧する
Horiguchi, Takeo 著作を一覧する
キーワード: alveolate
environmental clone
Favella ehrenbergii
Marine Alveolate Group I
parasitic dinoflagellate
発行日: 2007年 7月18日
出版者: Elsevier GmbH
誌名: Protist
巻: 158
号: 3
開始ページ: 337
終了ページ: 347
出版社 DOI: 10.1016/j.protis.2007.03.005
抄録: Small subunit ribosomal RNA gene sequences of Duboscquella spp. infecting the tintinnid ciliate, Favella ehrenbergii, were determined. Two parasites were sampled from different localities. They are morphologically similar to each other and both resemble D. aspida. Nevertheless, two distinct sequences (7.6% divergence) were obtained from them. Phylogenetic trees inferred from maximum likelihood and maximum parsimony revealed that these two Duboscquella spp. sequences are enclosed in an environmental clade named Marine Alveolate Group I. This clade consists of a large number of picoplanktonic organisms known only from environmental samples from various parts of the ocean worldwide, and which therefore lack clear characterization and identification. Here, we provide morphological and genetic characterization of these two Duboscquella genotypes included in this enigmatic clade. Duboscquella spp. produce a large number of small flagellated spores as dispersal agents and the presence of such small cells partially explains why the organisms related to these parasites have been detected within environmental genetic libraries, built from picoplanktonic size fractions of environmental samples. The huge diversity of the Marine Alveolate Group I and the finding that parasites from different marine protists belong to this lineage suggest that parasitism is a widespread and ecologically relevant phenomenon in the marine environment.
Relation (URI):
資料タイプ: article (author version)
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 堀口 健雄


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