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| Navarro,Claudio A; von Bernath,Diego; Jerez,Carlos A. |
| Microbial solubilizing of metals in acid environments is successfully used in industrial bioleaching of ores or biomining to extract metals such as copper, gold, uranium and others. This is done mainly by acidophilic and other microorganisms that mobilize metals and generate acid mine drainage or AMD, causing serious environmental problems. However, bioremediation or removal of the toxic metals from contaminated soils can be achieved by using the specific properties of the acidophilic microorganisms interacting with these elements. These bacteria resist high levels of metals by using a few "canonical" systems such as active efflux or trapping of the metal ions by metal chaperones. Nonetheless, gene duplications, the presence of genomic islands, the... |
| Tipo: Journal article |
Palavras-chave: Heavy metal resistance; Genomic islands; Environmental bacteria; Biomining; Metal bioremediation; Mobile genetic elements. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602013000400008 |
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| Zbinden, Magali; Cambon-bonavita, Marie-anne. |
| The phylogenetic diversity of the gut microbial population of the hydrothermal shrimp Rimicaris exoculata was determined. The presence of micro-organisms in the hindgut of the shrimp was determined, and their morphology illustrated for the first time by transmission electron microscopy. DNA was extracted from the fore-, mid- and hindgut of shrimps collected at the Rainbow site, at the Mid-Atlantic Ridge, and the sequences of the small-subunit rRNA (16S rDNA) were analyzed. Seven different bacterial phylotypes were identified from the 90 clones screened. The sequences were affiliated to three major groups: epsilon-Proteobacteria (48,8%), Entomoplasmatales (23.3%) and representatives of the new phylum Deferribacteres (26.6%). These results show that the... |
| Tipo: Text |
Palavras-chave: Metal bioremediation; Indigenous gut microllora; Genetic diversity; Shrimp; Hydrothermal vent. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/2003/publication-778.pdf |
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