Quantified RH length of wild-type Ws-2 and rhd6-1 grown under HN or LN in the presence or absence of IAA at the indicated concentrations. Number of individual roots analyzed in HN/LN: n = 12/12 (mock), 12/12 (20 nM IAA), 10/9 (50 nM IAA), and 10/10 (100 nM IAA) for Ws-2; n = 12/12 (mock), 12/12 (20 nM IAA), 10/10 (50 nM IAA), and 10/10 (100 nM IAA) for rhd6-1. In (B) and (F), horizontal lines indicate medians, box limits the 25th and 75th percentiles, and whiskers extend to 1.5 times the interquartile range from the 25th and 75th percentiles. Different letters indicate significant differences at p < 0.05 according to one-way ANOVA and post hoc Tukey test.
