Auxin can rescue the effect of cortical microtubule disruption on XTH expression during shade avoidance.

<p>(<b>A–C</b>) Relative transcript abundance of three green shade-induced <i>XTH</i> genes that were also auxin regulated, after 24 h of white light (white bars) or green shade (gray bars) treatment with individual and combined oryzalin and NAA pre-treatments. Values are expressed on a log2 fold scale and were normalized using <i>AtUBQ10</i> as an internal control. Data points represent means ± SE (n = 5). Different letters above each bar indicate statistically significant differences (P<0.05, Tukey's <i>b</i> test).