Constitutive mineralization of low concentrations of the herbicide linuron by a Variovorax sp. strain
2009; Oxford University Press; Volume: 292; Issue: 2 Linguagem: Inglês
10.1111/j.1574-6968.2009.01501.x
ISSN1574-6968
AutoresSebastian R SÃ ̧rensen, Allan Simonsen, Jens Aamand,
Tópico(s)Biocrusts and Microbial Ecology
ResumoThe mineralization of the herbicide linuron at concentrations of microg and mg L(-1) was studied in liquid batch experiments with Variovorax sp. strain SRS16. The strain was highly efficient at mineralizing a range of linuron concentrations (0.002-10 mg L(-1)) with 20-60% of the added (14)C-ring-labeled linuron metabolized to (14)CO(2) within hours to days depending on the initial linuron concentration and incubation period. At mg L(-1) linuron concentrations the mineralization activity by SRS16 was inducible and a shift to constitutive mineralization activity was apparent with a reduction in the linuron concentration to microg L(-1) levels. This study revealed that strain SRS16 is a promising candidate for bioaugmentation of water or soil resources contaminated with low linuron concentrations.
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