Degradation of 3,4-DCA by different strains obtained from the linuron-degrading culture or one of its subcultures. The data points and error bars show the means and standard deviations based on data from triplicate measurements. When error bars are not visible, they are hidden behind the symbols. ▪, Variovorax sp. strain WDL1; ▪, Pseudomonas sp. strain WDL5; ▴, D. acidovorans WDL34; ♦, H. sulfonivorans WDL6; −, C. testosteroni WDL7; •, linuron consortium; ×, 3,4-DCA consortium.