| Microbial degradation of microcystin-LR by Ralstonia solanacearum. | |
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MedLine Citation:
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PMID: 22439565 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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A bacterial strain was isolated from Lake Dianchi (China) and its degradability and degradative pathways of the cyanobacterial toxin microcystin-LR (MC-LR) were studied. On the basis of morphological, physiological and biochemical tests, the strain was identified as Ralstonia solanacearum. The acute oral toxicity tests showed that Ralstonia solanacearum belongs to a non-toxic class. This bacterium degraded MC-LR at the rate of 9.4 mg/L per day, which was higher than those of the other bacterial strains reported in the literature. As for the degradative pathways, the results showed that the Adda-Arg peptide bond of MC-LR was initially hydrolysed by Ralstonia solanacearum to form a linear molecule as an intermediate. The intermediate product subsequently underwent a cyclisation reaction via dehydration to form a final product with a small peptide ring at one end of the molecule. These biodegradative pathways were different from those reported with other bacterial strains, suggesting that MC-LR may undergo different transformations, and different products were formed due to different compositions of bacteria present in natural lakes and reservoirs. These results suggest that there is a significant potential for Ralstonia solanacearum as a degrader for MC-LR removal from wastewater. |
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Authors:
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M L Zhang; H Yan; G Pan |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Environmental technology Volume: 33 ISSN: 0959-3330 ISO Abbreviation: Environ Technol Publication Date: 2011 Dec |
Date Detail:
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Created Date: 2012-03-23 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9884939 Medline TA: Environ Technol Country: England |
Other Details:
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Languages: eng Pagination: 1779-87 Citation Subset: IM |
Affiliation:
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State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing, China. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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