Quantification of salicylic acid (SA), camalexin, and scopoletin in Pst-AvrRpm1-infected tissues (PI), in uninfected adjacent part of leaves (PU), in the mock-infiltrated tissues (MI), and in mock-uninfiltrated adjacent part of leaves (MU) 10 h or 24 h after inoculation. (A) Total pool of SA; (B) free SA; (C) camalexin; (D) scopolin; (E) scopoletin. Values correspond to the mean (±SD) of three replicates from one representative experiment out of two independent experiments. Letters indicate significant differences between values (Newman–Keuls test, P <0.05). In untreated leaves, levels of total SA, free SA, and scopolin reach 1.00±0.11, 0.27±0.02, and 0.04±0.01 μg g⁻¹ FW, respectively, while camalexin and scopoletin were undetectable.