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Characteristics of virus-like growth suppression agents against phytoplankton obtained from seawater at the Mouth of Funka Bay, Hokkaido, Japan

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タイトル: Characteristics of virus-like growth suppression agents against phytoplankton obtained from seawater at the Mouth of Funka Bay, Hokkaido, Japan
著者: Onji, Masashi 著作を一覧する
Sawabe, Tomoo 著作を一覧する
Ezura, Yoshio 著作を一覧する
キーワード: Alexandrium catenella
growth suppression
Gymnodinium mikimotoi
proteinase sensitivity
Tetraselmis sp.
ultracentrifugation
発行日: 2000年
出版者: Japanese Society of Fisheries Science
誌名: Fisheries science
巻: 66
号: 1
開始ページ: 38
終了ページ: 43
出版社 DOI: 10.1046/j.1444-2906.2000.00005.x
抄録: Eighteen samples of virus-like growth suppression agents against the marine phytoplankton Alexandrium catenella, Gymnodinium mikimotoi and Tetraselmis sp., obtained from the coastal waters at the mouth of Funka Bay, Hokkaido, Japan, from 1993 to 1995, were characterized on size estimation, heat stability, nuclease sensitivity, proteinase K sensitivity, stability under acidic condition, titration, diethyl ether sensitivity, and ultraviolet (UV) sensitivity. All agents were affected by heating at 50℃ for 30 min, exposure to acidic conditions below pH 5.0, passing through a 0.05 μm filter, RNase treatment, and irradiation of UV dosage at 5 × 10^4 μW/s per cm2. The growth suppression effects of 11 agents from Tetraselmis sp. and A. catenella disappeared after proteinase K treatment, however, seven agents from G. mikimotoi were unaffected by this treatment. Furthermore, 11 agents against Tetraselmis sp. and A. catenella were collected from the bottom fraction by ultracentrifugation, while seven agents against G. mikimotoi were collected from the upper fraction, not from the precipitated fraction. These results suggest that at least two types exist in the virus-like agents showing growth suppression for phytoplankton.
Rights: ©2000 公益社団法人日本水産学会 The Japanese Society of Fisheries Science
資料タイプ: article
URI: http://hdl.handle.net/2115/52093
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 澤辺 智雄

 

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