Figure 6.

VTE2 contributes to basal resistance against Psm infection. A to C, Basal resistance to Psm infection of different Arabidopsis lines. Three leaves of naïve plants were inoculated with bioluminescent Psm lux (OD₆₀₀ = 0.001), and bacterial numbers in leaves were assessed 60 h later. Data represent means ± sd of growth values from at least 10 replicate plants. Different letters above the bars denote statistically significant differences (P < 0.001, ANOVA and posthoc Tukey’s HSD test). The results were similar in three independent experiments (see Supplemental Fig. S4). D, Systemic acquired resistance in Col-0 and vte2-2 plants. Three lower (1°) leaves of a given plant were infiltrated with 10 mm MgCl₂ or inoculated with Psm (OD₆₀₀ = 0.005), and three upper (2°) leaves were challenge inoculated 2 d later with Psm lux (OD₆₀₀ = 0.001). Growth of Psm lux in 2° leaves was assessed 60 h post 2° challenge inoculation. Data represent means ± sd of growth values from at least nine replicate plants. Different letters above the bars denote statistically significant differences (P < 0.01, ANOVA and posthoc Tukey’s HSD test). The numbers above the brackets in D indicate the fold growth reduction due to the SAR effect. The results were similar in two independent experiments.