Figure 3.

Heatin activity is dependent on auxin.

(a,b) Hypocotyl lengths of 8‐day‐old wild‐type Col‐0 and auxin signalling mutant seedlings, on mock (DMSO solvent, grey bars) or in the presence of (a,b), Heatin (8.5 µm; blue bars), picloram (a) 5 µm or (b) 8.5 µm (light orange bars), and (b) HNA (red bars). (a) Asterisks indicate significant difference from Col‐0 wild type (P < 0.05). (b) Letters indicate significance groups (Tukey HSD post‐hoc test), where averages that do not share letters are significantly different from each other (P < 0.05). Error bars indicate SEM. Values are averages of three to five independent repetitions of 15–25 seedlings each. DMSO, dimethyl sulphoxide; HNA, 2‐hydroxy‐1‐naphthaldehyde.