Fig 4. Effects of the flavodoxins on the P. xenovorans susceptibility to oxidizing agents paraquat and H₂O₂ on agar plates.

Cells grown until exponential phase were platted, and discs containing 20 mM H₂O₂ or 20 mM paraquat were disposed on the plate. Growth inhibition zones were measured after 24 h incubation at 30ºC. The inhibition zone of 6 mm corresponds to the disc diameter without oxidizing agent (control). Significant differences were determined with a Tukey Test (p<0.05) as indicated. Each value is an average ± SD of at least three independent experiments.