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The wxr3 mutant displays defects in auxin transport. A, DR5rev:GFP expression in the wxr3 mutant and the control line treated with various auxins. Seedlings were 7 d old. B, Root elongation of wxr3 seedlings is resistant to naphthylphthalamic acid (NPA) treatment. C, The roots of wxr3 seedlings show a delayed response to gravity compared with the wild type (WT). Error bars represent se.
