Abstract
A collection of 17 atrazine-degrading bacteria isolated from soils was studied to
determine the composition of the atrazine-degrading genetic potential (i.e. trzN,
trzD and atz) and the presence of IS1071. The characterization of seven new
atrazine-degrading bacteria revealed for the first time the trzN-atzBC gene
composition in Gram-negative bacteria such as Sinorhizobium sp. or Polaromonas
sp. Three main atrazine-degrading gene combinations (i) trzN–atzBC, (ii)
atzABC–trzD and (iii) atzABCDEF were observed. The atz and trz genes were
often located on plasmids, suggesting that plasmid conjugation could play an
important role in their dispersion. In addition, the observation of these genes (i)
on the chromosome, (ii) on the same DNA fragment but on different plasmids and
(iii) on DNA fragments also hybridizing with IS1071 suggests that transposition
may also contribute to disperse the atrazine-degrading genes.
Original language | English |
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Journal | F E M S Microbiology Letters |
Volume | 273 |
Issue number | 1 |
Pages (from-to) | 78-86 |
ISSN | 0378-1097 |
DOIs | |
Publication status | Published - 2007 |
Keywords
- biodegradation
- insertion sequences
- atrazine
- atz genes
- trz genes