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Applied and Environmental Microbiology, February 1999, p. 853-855, Vol. 65, No. 2
0099-2240/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Effect of Aromatic Compounds on Cellular Fatty Acid Composition of Rhodococcus opacus

Irina V. Tsitko,1,2,* Gennadi M. Zaitsev,3 Anatoli G. Lobanok,2 and Mirja S. Salkinoja-Salonen1

Department of Applied Chemistry and Microbiology, University of Helsinki, FIN-00014, Helsinki,1 and Juvegroup Oy, 96400 Rovaniemi,3 Finland, and Institute of Microbiology, Belarus Academy of Sciences, 220141 Minsk, Belarus2

Received 19 November 1998/Accepted 24 November 1998

In cells of Rhodococcus opacus GM-14, GM-29, and 1CP, the contents of branched (10-methyl) fatty acids increased from 3% to 15 to 34% of the total fatty acids when the cells were grown on benzene, phenol, 4-chlorophenol, chlorobenzene, or toluene as the sole source of carbon and energy, in comparison with cells grown on fructose. In addition, the content of trans-hexadecenoic acid increased from 5% to 8 to 18% with phenol or chlorophenol as the carbon source. The 10-methyl branched fatty acid content of R. opacus GM-14 cells increased in a dose-related manner following exposure to phenol or toluene when toluene was not utilized as the growth substrate. The results suggest that 10-methyl branched fatty acids may participate in the adaptation of R. opacus to lipophilic aromatic compounds.

* Corresponding author. Mailing address: Division of Microbiology, Department of Applied Chemistry and Microbiology, P.O. Box 56, FIN-00014, Helsinki, Finland. Phone: 358 9 708 59324. Fax: 358 9 708 59322. E-mail: Irina.Tsitko{at}Helsinki.Fi.

Applied and Environmental Microbiology, February 1999, p. 853-855, Vol. 65, No. 2
0099-2240/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


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