Biotransformation of mercury by bacteria isolated from a river collecting cinnabar mine waters
| Autor: | Marco Filippelli, Franco Baldi, Gregory J. Olson |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Ecology
biology Aerobic bacteria Soil Science chemistry.chemical_element Mineralogy Biodegradation biology.organism_classification Mercury (element) Agar plate chemistry.chemical_compound Cinnabar chemistry Biotransformation Environmental chemistry Methylmercury Ecology Evolution Behavior and Systematics Bacteria |
| Zdroj: | Microbial ecology. 17(3) |
| ISSN: | 0095-3628 |
| Popis: | One hundred six strains of aerobic bacteria were isolated from the Fiora River which drains an area of cinnabar deposits in southern Tuscany, Italy. Thirty-seven of the strains grew on an agar medium containing 10μg/ml Hg (as HgCl2) with all of these strains producing elemental mercury. Seven of the 37 strains also degraded methylmercury. None of 106 sensitive and resistant strains produced detectable monomethylmercury although 15 strains produced a benzene-soluble mercury species. Two strains of alkylmercury (methyl-, ethyl- and phenylmercury) degrading bacteria were tested for the ability to degrade several other analogous organometals and organic compounds, but no activity was detected toward these compounds. Mercury methylation is not a mechanism of Hg resistance in aerobic bacteria from this environment. Growth of bacteria on the agar medium containing 10μg/ml HgCl2 was diagnostic for Hg detoxification based on reduction. |
| Databáze: | OpenAIRE |
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