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Endogenous Fe and Cu contents in wild-type and copt2-1 seedlings. Fe (A) and Cu (B) contents were measured by ICP-MS from whole 7-d-old wild-type (WT; white bars) and copt2-1 (gray bars) plants. Seedlings were grown under the same conditions described in Figure 3. Values are means ± sd of at least three biological replicates. D.W., Dry weight. Different letters above the bars represent significant differences among all the means (P < 0.05).
