Growth curves of wild-type D. gigas and Δroo D. gigas in the presence of 10 μM NO or 10 μM GSNO. Open symbols, wt; solid symbols, Δroo; squares, no induced stress; circles, added NO; triangles, added GSNO. NO and GSNO were added at an initial concentration of 10 μM at the time following inoculation indicated by the arrow. Each data point is the average of three independent growth experiments.