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. 2019 Nov 28;8(12):554. doi: 10.3390/plants8120554

Figure 1.

Figure 1

Concentration of Cu (A), Fe (B), Zn (C) and Mn (D) in cucumber leaves. Plants were harvested after 5 days of treatment with excess Cu (Cu), excess Cu and Si supply (Cu + Si), excess Cu and additional Fe supply (Cu + Fe) or combined excess Cu and additional Fe and Si supply (Cu + Fe + Si); control plants (C) remained untreated. Bars are means of four replicates ± SD. Different letters indicate significant differences among the treatments at p < 0.05.