Figure 1.

Transgenic tomato plants expressing HopQ1 exhibit enhanced disease susceptibility to Pto. T4 homozygous transgenic tomato plants expressing Dex-inducible HopQ1-3xFLAG or GFP were sprayed with 30 μm Dex 24 h before syringe infiltration with Pto DC3000. A, Growth curve illustrating bacterial population sizes 4 d post inoculation with Pto DC3000 at a concentration of 1 × 10⁵ cfu mL⁻¹. B, Disease symptoms 4 d post inoculation with Pto DC3000. C, Growth curve illustrating bacterial population sizes 4 d post inoculation with Pto DC3000 ΔhrcC at a concentration of 1 × 10⁶ cfu mL⁻¹. For growth curves in A and C, values represent means ± sd (n = 6). The data shown are representative of three independent experiments with similar results. Statistical differences were detected by a two-tailed Student’s t test (α = 0.01). D, Anti-FLAG western blot illustrating HopQ1 protein expression. [See online article for color version of this figure.]