Journal
BIORESOURCE TECHNOLOGY
Volume 148, Issue -, Pages 311-316Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.08.155
Keywords
Aromatic compounds; Biodegradation; In silica; Quorum sensing; Acyl homoserine lactone
Funding
- NNSFC [21137003, 21077090]
- 973 program [2014CB114403]
- SRF for ROCS SEM [J20120548]
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Phylogenetic overlaps between aromatics-degrading bacteria and acyl-homoserine-lactone (AHL) or autoinducer (AI) based quorum-sensing (QS) bacteria were evident in literatures; however, the diversity of bacteria with both activities had never been finely described. In-silico searching in NCBI genome database revealed that more than 11% of investigated population harbored both aromatic ring-hydroxylating-dioxygenase (RHO) gene and AHL/AI-synthetase gene. These bacteria were distributed in 10 orders, 15 families, 42 genus and 78 species. Horizontal transfers of both genes were common among them. Using enrichment and culture dependent method, 6 Sphingomonadales and 4 Rhizobiales with phenanthrene- or pyrene-degrading ability and AHL-production were isolated from marine, wetland and soil samples. Thin-layer-chromatography and gas-chromatography-mass-spectrum revealed that these Sphingomonads produced various AHL molecules. This is the first report of highly diverse bacteria that harbored both aromatics-degrading and QS systems. QS regulation may have broad impacts on aromatics biodegradation, and would be a new angle for developing bioremediation technology. (C) 2013 Elsevier Ltd. All rights reserved.
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