Isolation and Metabolic Characterization of a Pseudomonas stutzeri Mutant Able To Grow on the Three Isomers of Xylene.

Applied and Environmental Microbiology
L DiP Barbieri

Abstract

From an o-xylene-degrading Pseudomonas stutzeri strain (OX1), we previously isolated mutant M1, which had acquired the ability to grow on m-xylene and p-xylene but lost the ability to utilize the ortho isomer. From M1 cultures we have now isolated a revertant strain (R1) which grows on o-xylene and retains the ability to grow with the meta and para isomers regardless of the selective pressure applied. In P. stutzeri R1, o-xylene is degraded through two successive monooxygenations of the aromatic ring, while m-xylene and p-xylene catabolism proceeds through the progressive oxidation of a methyl substituent, although unquantifiable amounts of these two substrates are transformed into the corresponding dimethylphenols, which are not utilized for further growth. The two catabolic pathways are inducible by all three xylene isomers.

References

Jan 1, 1979·Methods in Enzymology·M KahnD R Helinski
Jan 1, 1987·Antonie van Leeuwenhoek·G SchraaA J Zehnder
Sep 1, 1987·Applied and Environmental Microbiology·G BaggiS Tollari

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Citations

Jul 2, 1999·Journal of Applied Microbiology·F Solano-SerenaJ P Vandecasteele
Jun 2, 2004·Applied Microbiology and Biotechnology·Sophie PenetFrédéric Monot
Jun 9, 2006·Microbiology and Molecular Biology Reviews : MMBR·Jorge LalucatNorberto J Palleroni
Aug 4, 2004·Applied Microbiology and Biotechnology·Gönül VardarThomas K Wood

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