Figure 4.

Combination mutants have root phenotypes consistent with defects in auxin responses. A, Combination mutants were grown on media without hormone, and root length was measured. B, Mutants were grown without hormone and have fewer lateral roots. Root density is the number of lateral roots per millimeter of primary root length. For A and B, n ≥ 15; error bars represent se, and a and b indicate significant differences using one-way ANOVA (P < 0.05). C, Roots were imaged from 7-d-old seedlings, and root hair length was measured using ImageJ software. Results shown are representative of four experiments. Insets, One representative wild-type plant and one representative mutant plant.