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. 2019 Nov 12;10:2591. doi: 10.3389/fmicb.2019.02591

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Copyright © 2019 Huang, Chen, Zhang, Song, Chen and Tang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Relative changes in root tolerance index and specific root length of Robinia pseudoacacia seedlings grown with or without Funneliformis mosseae and subjected to different Pb levels for 4 months. (A) Root tolerance index. (B) Specific root length. 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).