Figure 1.

Chlorophyll a (A) and chlorophyll b (B) concentrations, net photosynthetic rate (C) and stomatal conductance (D) of liquorice plants under different treatments (□ non-inoculation; ■ AM inoculation). US and S represent unsterilization and sterilization treatments, respectively. Data are presented as means ± standard error (SE; n = 4). Treatment effects (S: Sterilization; I: Inoculation) are tested by two-way ANOVA and are shown as p values in the figure. Different lowercase letters above the columns indicate a significant difference between corresponding treatments at p < 0.05 by Tukey’s HSD test.