Fig 2. Pb concentrations in leaves (a) and roots (b), and the TF (c) of R. pseudoacacia were affected by Pb stress levels and AMF inoculation.

NM, non-inoculated control; Fm, inoculated with F. mosseae; and Ri, inoculated with R. intraradices. The results are the mean (n = 6) ± SD. The same letter indicates no significant difference among treatments (Duncan’s test, P < 0.05). Two-way ANOVAs were used to determine the significance of the effects of Pb stress (Pb), AMF inoculation (AMF), and their interactions (Pb × AMF) on the Pb concentration and TF of black locust seedlings, as shown in S1 Table.