Figure 7.

A diagram displaying the effects of Cu–pH interactions on ROS and MG metabolisms in leaves (A) and roots (B). In this figure, we used italics for enzymes and plain format for metabolites. An asterisk indicates a significant difference between two treatments of a comparative group at p < 0.05. An enzyme or metabolite was considered increased (decreased) when it had both a relative change of more (less) than 1 and a p-value of < 0.05. P3L, pH 3.0 + 0.5 μM Cu-treated leaves; P3R, pH 3.0 + 0.5 μM Cu-treated roots; P5L, pH 4.8 + 0.5 μM Cu-treated leaves; P5R, pH 4.8 + 0.5 μM Cu-treated roots; P3CL, pH 3.0 + 300 μM Cu-treated leaves; P3CR, pH 3.0 + 300 μM Cu-treated roots; P5CL, pH 4.8 + 300 μM Cu-treated leaves; and P5CR, pH 4.8 + 300 μM Cu-treated roots.