<p>Cells were treated with 9 μg ml<sup>-1</sup> harpin (hrp, closed circles) as a positive control, harpin combined with 10 μM (open triangles) or 50 μM auxins (IAA, NAA, or 2, 4-D, closed triangles), or ethanol used as solvent control (con, open circles) in <i>V</i>. <i>rupestris</i> (<b>A</b>, <b>C</b>, and <b>E</b>) and cv. ‘Pinot Noir’ (<b>B</b>, <b>D</b>, and <b>F</b>). Representative experiments from five biological replicas are depicted. Harpin and auxin were added at time 0, if measured isolated, for the combinations, auxins were added 1 h prior to harpin.</p
