Degradation of the cyanobacterial hepatotoxin microcystin by a new bacterium isolated from a hypertrophic lake
Degradation of the cyanobacterial hepatotoxin microcystin by a new bacterium isolated from a hypertrophic lake
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DOI：
10.1002/tox.1041
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发表时间：
2001-08-01
影响因子：
4.5
通讯作者：
Kato, K
中科院分区：
文献类型：
--
作者：
Park, HD;Sasaki, Y;Kato, K
从一个肥厚湖泊中分离出一种能够降解微囊藻毒素的细菌- rr、-YR和-LR。该细菌被命名为Y2，表型上被归类为鞘氨单胞菌属的成员，根据16S rDNA测序，在系统发育上与任何已建立的鞘氨单胞菌物种不同。通过人工化学分类初步确定该细菌为鞘氨单胞菌，但16S rRNA测序分析表明它实际上是一个新种甚至是一个新属。将Y2菌加入到含有微囊藻毒素的培养基中，微囊藻毒素在4天内被完全降解。微囊藻毒素- rr和-LR的最高降解率分别为13和5.4 mg L-1 d（-1）。降解速率与温度密切相关，在30℃时降解速率最大。(C) 2001, John Wiley & Sons, Inc。
A bacterium capable of degrading microcystins-RR, -YR, and -LR was isolated from a hypertrophic lake. The bacterium, designated Y2 and classified phenotypically as a member of the genus Sphingomonas, was shown to be distinct phylogenetically from any established species of Sphingomonas on the basis of 16S rDNA sequencing. The bacterium was tentatively identified as Sphingomonas by manual chemotaxonomy, but 16S rRNA sequencing analysis suggests that it is in fact a new species or even a new genus. When the Y2 bacterium was added to microcystins present in culture medium, the microcystins were degraded thoroughly in 4 days. The highest degradation rates of microcystins-RR and -LR were 13 and 5.4 mg L-1 day(-1), respectively. The degradation rates were strongly dependent on temperature and the maximum rate was at 30 degreesC. (C) 2001 by John Wiley & Sons, Inc.