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Release of dissolved free amino acids from biofilms in stream water

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タイトル: Release of dissolved free amino acids from biofilms in stream water
著者: Ishizawa, Sayaka 著作を一覧する
Yamamoto, Yuzo 著作を一覧する
Denboh, Takashi 著作を一覧する
Ueda, Hiroshi 著作を一覧する
キーワード: Dissolved free amino acids
Epilithic algae
Salmon homing
Toyohira River
発行日: 2010年 7月
出版者: Springer Japan
誌名: Fisheries Science
巻: 76
号: 4
開始ページ: 669
終了ページ: 676
出版社 DOI: 10.1007/s12562-010-0246-2
抄録: We investigated the origin of dissolved free amino acids (DFAA) in stream water focusing on biofilms in the river bed by means of incubation experiments in the laboratory. Stones were placed in the Toyohira River, Hokkaido, Japan, for 3 months, allowing formation of biofilms, and then incubated for 24 hours in the laboratory at stream water temperature. After incubation, the composition and concentrations of DFAA in the incubation solution and total hydrolyzed amino acids (THAA) in biofilms were measured by high-performance liquid chromatography. The amount of chlorophyll a (Chl. a) and the number of bacteria were also measured. The DFAA concentration increased greatly in the biofilm incubation solution, but the DFAA composition (mole %) did not change relative to the inception of incubation, where it was similar to stream water. There was no correlation between the increase in DFAA concentration and the THAA concentration, Chl. a amount, or the number of bacteria in biofilms. These results suggest that biofilms are one of the major sources of DFAA in stream water.
Rights: ©2010 公益社団法人日本水産学会 The Japanese Society of Fisheries Science
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: 上田 宏


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