Figure 3

Fold changes of expression of pporRFP reporter following phytopathogenic bacterial treatments. Twenty-four hours after initial agroinfiltration of individual synthetic promoter constructs, tobacco leaves were re-infiltrated with mock, P. syringae pv. tomato, P. marginalis, or P. syringae pv. tabaci. Expression of pporRFP reporter was quantified using a SPEX Fluorolog at time points 0, 24, 48, and 72 h post inoculation (hpi). Each bar represents the mean value of pporRFP expression obtained from three independent biological experiments with the standard errors of the mean noted. Significant pporRFP expression changes (indicated by asterisks) were determined statistically by use of a paired t-test (p < 0.05).