Fig. 3
Net photosynthetic rate (Pn; A), stomatal conductance (gs; B), intercellular CO2 concentration (Ci; C), and transpiration rate (Tr; D) of A. rugosa under different ozonated water treatments (0, 1, 10, 20, 40, and 80 s at 1 µmol mol−1). Each value indicates the mean ± standard error (SE) of three samples (n = 3). Different letters represent the significant differences at p ≤ 0.05, as assessed using the analysis of variance (ANOVA), followed by Tukey’s multiple range test