Figure 2.

Survival test of strains NA1000 (white square), SP0057(white triangle) or SP0057(pMRFur) (black triangle) after addition of 5 mM paraquat (A) or 5 mM tert-butyl hydropheroxide (B). Cultures grown at 30°C in PYE medium up to midlog phase and the oxidative agents were added at time zero. At the indicated time points, aliquots were removed and plated for counting colonies. Survival was determined relative to the colony number at time 0. The results shown are the average of three independent experiments.