<p><b> (A)</b> Root length after 10 day-treatment with auxin; experiment was performed twice; for a better comparison between the experiments, all values were normalized to the mock-treated plants; n = 4–18 plants per data point. <b>(B)–(B”)</b> Representative pictures of the root meristem phenotype at 10 DAG upon hormone treatment according to the captions; arrow heads mark the transition zones; insets show magnifications of the transition zones; scale bars 200 μm and 100 μm in the magnification. <b>(C)</b> Meristem length upon hormone treatment, measured by meristem length; experiment was performed twice; all values are normalized to the mock-treated control; n = 7–17 roots per data point; significance was determined using the two-tailed Student’s t test, * = p<0.05, ** = p<0.001.</p
