Abstract
Polychlorinated aromatic compounds, including pentachlorobenzenes and hexachlorobenzenes, are recalcitrant industrial pollutants that cause adverse effects on living cells. In this paper, the isolation of Pseudomonas fluorescens species with high resistance to pentachlorobenzene (PeCB) is reported. It was found that, in contrast to its slightly negative effect on P. fluorescens growth, PeCB readily inhibited the cell growth of Serratia spp. and Escherichia coli strains, thus indicating that inhibition of bacterial growth by PeCB is species-dependent. Analysis of a P. fluorescens isolate revealed that the exposure to PeCB induced production of reactive oxygen species and led to an increase in the level of alkyl hydroperoxide reductase C (AhpC), an important enzyme enhancing the cell tolerance to organic hydroperoxides usually accumulated under oxidative stress. The putative mechanism conferring PeCB resistance to P. fluorescens and the potential use of P. fluorescens in bioremediation are discussed.
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Acknowledgements
We are grateful to the staff of the Genomics and Proteomics Units at the Advanced Core Research Facilities (SGIker) of the University of the Basque Country (UPV/EHU) for the technical support and assistance provided. The work was supported by the Basque Government (grant PRE-2013-1-901 and SAIOTEK grant S-PE12UN84) and by IKERBASQUE (Basque Foundation for Science).
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Montánchez, I., Kaberdina, A.C., Sevillano, E. et al. Isolation of Pseudomonas fluorescens species highly resistant to pentachlorobenzene. Folia Microbiol 62, 325–334 (2017). https://doi.org/10.1007/s12223-017-0501-3
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DOI: https://doi.org/10.1007/s12223-017-0501-3