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Fig. 4. Effect of As and P amendment (mg kg–1) on translocation factors (the ratio of fronds As content to those in roots) (A–C) and bioconcentration factors (the ratio of fronds As concentration to those in soil) (D–F) of Chinese brake fern (Pteris vittata L.) grown in the presence (•) or absence ({circ}) of mycorrhizal inoculum. Data points represent means of five replicates ± SEM.