Degradative ability of 2,4,6-tribromophenol by saprophytic fungi Trametes versicolor and Agaricus augustus isolated from chilean forestry

Abstract

Trametes versicolor and Agaricus augustus, with a maximum tolerable concentration (MTC) of 80 lg ml -1 tribromophenol (TBP), were selected to evaluate TBP biodegradation capacity. These fungi were capable of decreased TBP concentrations and A. augustus was also capable of biotransforming TBP to tribromoanisole (TBA). Peroxidase and laccase activities were observed in the T. versicolor supernatant but not in that of A. augustus. These tolerance levels could be due to either lignolytic enzymes that degrade TBP or the ability of the fungi to biotransform TBP to tribromoanisole, respectively. The sustained ability of T. versicolor to degrade TBP (total of 40 lg ml -1 ) in the presence of an additional carbon source suggests that it may have potential applications in the degradation of forestry industry waste.

Enzymatic characterization of Chilean native wood-rotting fungi for potential use in the bioremediation of polluted environments with chlorophenols

“…PCP degradation test suggest that there is no relationship between tolerance and degradation ability. This result was previously reported by Donoso et al (2008), who studied the tolerance levels and degradation capacities of 2,4,6-tribromophenol by fungi isolated from Chilean forest and by Martinez et al (2000), who studied the tolerance and degradation of chlorophenols in bacteria. They indicated that these properties are not necessarily related.…”

“…However, the practical application of this fungus has been not always possible. Recent studies have focused on the search for other lignin-degrading strains capable to produce enzymes for various biotechnological applications (de Koker et al 2000;Machado et al 2005;Tekere et al 2001;Levin et al 2004;Guimarães et al 2006;Husain 2006;Donoso et al 2008). Husain (2006), reviewed the potential applications of several oxidoreductive enzymes (peroxidases, laccase, micro peroxidase) participating in the decolorization and degradation of dyes present in industrial effluents.…”

“…Montiel et al (2004) showed that tyrosinase from Amylomyces rouxii may be involved in pentachlorophenol (PCP) degradation when tyrosine is added in the medium. Donoso et al (2008) studied the degradative ability of several saprophytic fungi isolated from Chilean forestry to produce peroxidase and laccase and to degrade 2,4,6-tribromophenol.…”

Biodegradation kinetics and mechanism of 2,4,6-tribromophenol by Bacillus sp. GZT: A phenomenon of xenobiotic methylation during debromination

“…For instance, some halogenated phenols can be biotransformed into corresponding methylated chemicals such as anisoles, veratroles, or guaiacols (Neilson et al, 1988;McNally and Harper, 1991). However, the xenobiotic methylation mechanism of TBP was still scarce (Donoso et al, 2008). Thus, a phenomenon of xenobiotic methylation deserved to identify during the biological debromination of TBP by the new-isolated strain Bacillus sp.…”

The Role of White-rot Fungi in Herbicide Transformation

“…[11,[56][57][58][59][60][61][62][63][64][65]. This list may be expanded given the strong evidence for WRF degradation potential toward different classes of pollutants.…”