Summary
An actinomycete, Rhodococcus chlorophenolicus, isolated from a pentachlorophenol-degrading mixed bacterial culture is a polychlorophenol degrader. It was shown to oxidize pentachlorophenol into carbon dioxide and to metabolize also 2,3,4,5-,2,3,4,6-, and 2,3,5,6-tetrachlorophenol, 2,3,4-, 2,3,5-, 2,3,6-, 2,4,6-, and 2,4,5-trichlorophenol, 2,5-, and 2,6-dichlorophenol and tetrachloro-p-hydroquinone in an inducible manner. Pentachlorophenol set on the synthesis of enzymes required for the metabolism of all these chlorophenols and of tetrachloro-p-hydroquinone. 2,4,5-, and 2,4,6-trichlorophenol and 2,5-, and 2,6-dichlorophenol were degraded by R. chlorophenolicus cells only if these had previous contact to pentachlorophenol. Other chlorophenols mentioned were able to set on the synthesis of enzymes for their own degradation. 2,3,4,5-, and 2,3,4,6-tetrachlorophenol, and 2,3,5-, 2,4,5-, and 3,4,5-trichlorophenol were more toxic to R. chlorophenolicus than the other chlorophenols, but nevertheless 2,3,4,5-, and 2,3,4,6-tetrachlorophenol and 2,3,5-trichlorophenol were readily degraded by the bacteria.
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Abbreviations
- DCP:
-
dichlorophenol
- TCP:
-
trichlorophenol
- TeCP:
-
tetrachlorophenol
- PCP:
-
pentachlorophenol
- TeCH:
-
tetrachloro-p-hydroquinone
References
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An example of numeration: 2345-TeCP, 2,3,4,5-tetrachlorophenol
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Apajalahti, J.H.A., Salkinoja-Salonen, M.S. Degradation of polychlorinated phenols by Rhodococcus chlorophenolicus . Appl Microbiol Biotechnol 25, 62–67 (1986). https://doi.org/10.1007/BF00252514
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DOI: https://doi.org/10.1007/BF00252514