Figure 1. Iron and Cu concentrations in Arabidopsis and cucumber leaves. Arabidopsis rosette (A) Cu and (B) Fe concentration at different Fe and Cu supplies. Plants were grown for 9 d on hydroponic solution with Cu and Fe supply as indicated. (C) Cucumber first leaf Fe and Cu concentrations after 7 d growth on –Fe or +Fe (10 µM) solution. * indicates significant difference from +Fe (P ≤ 0.05) as determined by t-test.