The mineralization of the herbicide linuron at concentrations of μg 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 14C-ring-labeled linuron metabolized to 14CO2 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 μg 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.
- Programområde 2: Vandressourcer