FIGURE 3.
Relative changes in root activity of Robinia pseudoacacia seedlings grown with or without Funneliformis mosseae and subjected to different Pb levels for 4 months. Shown are means ± SD (n = 3). Asterisks indicate significant differences between inoculated and non-inoculated seedlings within each Pb treatment (∗P < 0.05, ∗∗P < 0.01; t-test). Different lowercase letters indicate significant differences among different Pb levels within inoculated or non-inoculated treatment (P < 0.05; ANOVA with post hoc Duncan).
