Figure 3.

Enhanced disease susceptibility of smr1-1 and sim-1 smr1-1 mutants was rescued by BTH treatment. A, Bacterial growth assay. Plants were sprayed with 300 μm BTH or water for 24 h, and the fifth to seventh leaves of the treated plants were infiltrated with the virulent strain PmaDG3 (OD₆₀₀ = 0.0001). Leaf discs were taken 3 d post infection for the measurement of bacterial growth. Statistical analysis was performed with Student’s t test (StatView 5.0.1). Different letters indicate significant difference among the samples (n = 6; P < 0.01). B, Disease symptoms. Pictures of the infected leaves were taken at 4 d post infection. These experiments were repeated twice with similar results.