Abstract
Carbazole, carbazoles with monomethyl or dimethyls substituted on different positions (C1-carbazoles or C2-carbazoles), and benzocarbazoles, as toxic and mutagenic components of petroleum and creosote contamination, were biodegradable by an isolated bacterial strain Pseudomonas sp. XLDN4-9. C1-carbazoles were degraded in preference to carbazole and C2-carbazoles. The biodegradation of C1-carbazoles or C2-carbazoles was influenced by the positions of methyl substitutions. Among C1-carbazole isomers, 1-methyl carbazole was the most susceptible. C2-carbazole isomers with substitutions on the same benzo-nucleus were more susceptible at a concentration of less than 3.4 μg g−1 petroleum, especially when harboring one substitution on position 1. In particular, 1,5-dimethyl carbazole was the most recalcitrant dimethyl isomer.
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The work was supported by the Chinese National Natural Science Foundation (grant nos. 20377026 and 20590368) and Chinese National Programs for High Technology Research and Development (grant no. 2004AA649160).
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Li, L., Li, Q., Li, F. et al. Degradation of carbazole and its derivatives by a Pseudomonas sp.. Appl Microbiol Biotechnol 73, 941–948 (2006). https://doi.org/10.1007/s00253-006-0530-3
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DOI: https://doi.org/10.1007/s00253-006-0530-3