Figure 5

Growth of bacterial pathogens in tobacco leaves. Tobacco leaves were infiltrated with P. syringae pv. tabaci, P. syringae pv. tomato, or P. marginalis, as described in "Methods." Bacterial population size was determined in leaf discs from inoculated leaves. Data points represent mean colony-forming unit (cfu) per leaf disc of three independent experiments with the standard errors of the mean noted.