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. 2008 Jul 3;105(28):9829–9834. doi: 10.1073/pnas.0803996105

Fig. 1.

Fig. 1.

Auxin response is greatly enhanced by and dependent on BRs. (A) BR treatment increases sensitivity to exogenous auxin and synergistically enhances auxin-induced hypocotyl elongation. (B) Reducing BR synthesis with BRZ causes a dramatic reduction in auxin response. Average hypocotyl lengths of 10–15 light-grown 4-day-old seedlings are shown in A and B. (C) Quantitative RT-PCR experiments were performed by using RNA extracted from 5-day-old light-grown seedlings treated for 1, 3, or 6 h with mock (m), BR (b), IAA (a), or combined hormone (ab) treatments. Representative examples of observed patterns are shown. Many genes showed an increase in magnitude and duration of expression when both hormones were present (as shown here for At1g62440); other genes were insensitive to BR effects (as shown here for At4g32280). Error bars indicate standard error.