FIG. 5.

Growth of the wild-type strain and the ferritin-deficient mutants of E. chrysanthemi under oxidative and nitrosative conditions. Cells were grown in L medium with intensive shaking under normal conditions or in the presence of 0.5 mM of H₂O₂, 6 μM paraquat, 2.5 μM streptonigrin, or 70 μM spermine NONOate, as indicated on the graphs. Filled squares, wild-type strain; open circles, bfr mutant; open diamonds, ftnA mutant; open triangles, bfr ftnA mutant. Experiments were performed five times, and the data reported are the means of three independent experiments, with standard deviations corresponding to less than 5%.