Abstract
The growth ofRhodococcus opacus GM-14 on mixtures of 2-chloro- and 2-bromophenol, of 4-chloro, 4-bromo-, and 4-iodophenol, and of chloro-, bromo-, and iodobenzenes was accompanied by the consumption of the substrates and the excretion of halogen ions into the medium. During the growth on monochlorophenols, the substrates were consumed sequentially in the following order: 4-chloro-, 3-chloro-, and then 2-chlorophenol. Chlorine ions were excreted in a two-phase manner in amounts comprising 79% of the theoretical yield. The diauxic growth ofR. opacus GM-14 can be explained by the existence in this bacterium of two modified metabolic pathways for theortho- cleavage of halogenated pyrocatechols. The first pathway included 4-halogeno- or dihalogenopyrocatechols as intermediates, whereas the second pathway included 3-halogenopyrocatechols.
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Zaitsev, G.M., Surovtseva, E.G. Growth ofRhodococcus opacus on mixtures of monohalogenated benzenes and phenols. Microbiology 69, 401–405 (2000). https://doi.org/10.1007/BF02756763
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DOI: https://doi.org/10.1007/BF02756763