Journal
FEMS MICROBIOLOGY LETTERS
Volume 282, Issue 2, Pages 166-173Publisher
BLACKWELL PUBLISHING
DOI: 10.1111/j.1574-6968.2008.01111.x
Keywords
Nitrosomonas europaea; ammonia-oxidizing bacteria (AOB); surfactants; linear alkylbenzene sulfonates (LAS); anionic detergent; DNA microarrays
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Linear alkylbenzene sulfonates (LAS) constitute, quantitatively, the most important group of synthetic surfactants used today. We studied the gene expression of Nitrosomonas europaea in response to LAS using a DNA microarray because ammonia-oxidizers are thought to be more sensitive to LAS than other microorganisms. Our objective was to elucidate which genes are expressed for N. europaea in response to LAS exposure. Microarray analysis and real-time PCR assay revealed that c. 30 genes were significantly expressed after LAS exposure, in particular genes associated with energy production and conversion. Our findings demonstrate that physical disruption of membrane structures, which contain enzymes associated with energy production and conversion, might be an important explanation for the high sensitivity of N. europaea to LAS exposure.
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