Figure 3.

SA content, JA content, and fold-change in the expression of related genes involved in the SA- and JA-dependent signaling pathways for two tomato genotypes grown under ambient O₃ (AO₃) and elevated O₃ (EO₃) with and without B. tabaci infestation. (A) SA content; (B) relative expression of PR; (C) JA content; (D) relative expression of PI. Each value represents the mean (± SE) of four OTCs (eight plants for each genotype per OTC). Different lowercase letters indicate significant differences among the combinations of B. tabaci treatment and O₃ concentrations within the same genotype. Different uppercase letters indicate significant differences between genotypes within the same O₃ treatment and B. tabaci treatment, as determined by Tukey's multiple range test at P < 0.05.