Fig 2. Herbicide biodegradation by ammonium-grown Arthrobacter aurescens TC1.

The bacterium cells were grown in medium with 2.8 mM nitrogen from ammonium. It is represented the time-course (in hours, h) variation curves of terbuthylazine (■, ●, ▲) or atrazine (□, ○, △) concentration in the supernatant of phosphate-salt buffer (pH 7) supplemented with each herbicide (initial concentration ~ 0.05 mM) and inoculated at time zero with the bacterium cells (■, □) or with cells killed by boiling (▲, △), or non-inoculated (●, ○). Error bars represent ± 1 standard deviation.