Isolation and Characterization of Bacterial Isolates Algicidal against a Harmful Bloom-forming Cyanobacterium <I>Microcystis aeruginosa</I>
スポンサーリンク
概要
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Algicidal bacteria MaI11-2, MaI11-5 and MaI11-10, which inhibited the growth of a harmful bloom-forming cyanobacterium <I>Microcystis aeruginosa</I>, were isolated from a sewage treatment plant. The isolate MaI11-5 was phylogenetically affiliated into the genus <I>Pedobacter</I>, while MaI11-2 and MaI11-10 were closely related to <I>Bacillus aerophilus</I>, <I>Bacillus altitudinis</I> and <I>Bacillus stratosphericus</I> with 100% identity based on 16S ribosomal RNA sequences. Co-cultivation of <I>M. aeruginosa</I> with the algicidal isolates showed their high algicidal activity. MaI11-5 showed the highest inhibitory effect on the cyanobacterial growth: the inhibitory effect exceeded 50% after 2 days, and reached to 75-85% after 10 days, regardless of the bacterial cell density. The cyanobacterial cells aggregated and produced mucilaginous, glycocalyx-like compounds when attacked by the algicidal bacteria. These results suggest that the algicidal bacteria isolated in the present study are potentially useful as biocontrol agents against <I>M. aeruginosa</I> bloom.
著者
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Komatsu Masaharu
Department Of Applied Chemistry Faculty Of Engineering Kyushu University
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Li Yang
Department Of Biochemistry Yong Loo Lin School Of Medicine National University Of Singapore
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Yoshikawa Takeshi
Department Of Biochemistry And Technology Of Aquatic Resources Faculty Of Fisheries Kagoshima Univer
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Maeda Hiroto
Department of Biochemistry and Technology of Marine Food and Resources, Faculty of Fisheries, Kagoshima University
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ISHIBASHI KENICHI
Nagoya Sangyo University
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ITO TATSUO
Nagoya Sangyo University
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HONGYI WEI
Department of Biochemistry and Technology of Marine Food and Resources, Faculty of Fisheries, Kagoshima University
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JINSAN LIN
Nagoya Sangyo University
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