Figure 10.

Ethylene is involved in plant resistance against both Pst and Pst-avrRpt2. Five-week-old wild-type (Col-0) and acs mutant Arabidopsis plants grown under a short-day light cycle were used for pathogen assays. Fully expanded leaves (three per plant) were infiltrated with either Pst (A) or Pst-avrRpt2 (B; OD₆₀₀ = 0.001). SA pretreatment was performed by spraying the plants with SA (1 mm) and drenching the soil with SA (1 mm) at the same time for 24 h before pathogen infiltration. Bacterial growth was quantified 3 d post inoculation. Student’s t test was used to compare mutants and the wild type (*, P ≤ 0.05; and **, P ≤ 0.01). CFU, Colony-forming units.