Biodegradation of microcystins by aquatic Burkholderia sp from a South Brazilian coastal lagoon
Biodegradation of microcystins by aquatic Burkholderia sp from a South Brazilian coastal lagoon
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DOI：
10.1016/j.ecoenv.2007.03.013
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发表时间：
2008-03-01
影响因子：
6.8
通讯作者：
Matthiensen, Alexandre
中科院分区：
文献类型：
--
作者：
Lemes, Gilmar A. F.;Kersanach, Ralf;Matthiensen, Alexandre
Biological degradation of cyanobacterial hepatotoxin microcystins in estuarine and coastal water samples from the Patos Lagoon estuarine system, a coastal lagoon situated at the southernmost region of Brazil, was observed. Samples of natural surface water were spiked with purified and semi-purified microcystins (MC-LR and [D-Leu(1)]MC-LR) and their concentrations were monitored by HPLC analysis. After 15 days, the toxins were no longer detectable and after 43 days less than 90% of the initial concentration added to the samples was detected by ELISA. The average degradation rates and the exponential decay rate constants from inside and outside of the estuary were similar. A microcystin degradative bacterium was isolated from the estuarine region. Partial sequence of the 16S rDNA showed a 96% homology with the Burkholderia genus. This genus belongs to the beta subdivision on proteobacteria. This is the first report showing the genus Burkholderia as a cyanobacterial toxin degrader. (c) 2007 Elsevier Inc. All rights reserved.
