A microcystin degradative bacteria was isolated from natural lakes and its phylogenetic position was confirmed. The 16 s rRNA of the bacteria exhibited 98.5% homology with the 16 s rRNA of Sphingomonas stygia belonging to the alpha subdivision on proteobacteria. The bacteria could degrade microcystins as a sole carbon source, therefore the bacteria utilizes microcystin. The bacteria could degrade microcystins LR, YR and RR, and their specific degradation rates were 0.66 h−1, 1.25 h−1 and 1.90 h−1, respectively. The degradation activity and growth rate of the bacteria was decreased under alkaline pH conditions.
Degradation characteristics of microcystins by isolated bacteria from Lake Kasumigaura
(Present address) National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-0053, Japan
Takeshi Saitou, Norio Sugiura, Tomoaki Itayama, Yuhei Inamori, Masatoshi Matsumura; Degradation characteristics of microcystins by isolated bacteria from Lake Kasumigaura. Journal of Water Supply: Research and Technology-Aqua 1 February 2003; 52 (1): 13–18. doi: https://doi.org/10.2166/aqua.2003.0002
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