Figure 2

Apparent photosynthetic index of spinach leaves treated with different concentrations of MeJA. Note: (A) Net photosynthetic rate (Pn), (B) stomatal conductance (Gs), (C) intercellular CO2 concentration (Ci), (D) transpiration rate (Tr), and (E) stomatal limiting value (Ls). Different lowercase letters indicate significant differences (p < 0.05) among treatments, as follows.