Fig. S5.

Expression of LFS coincides with the DR5 auxin expression maxima. (A and B) In situ hybridization of an LFS probe in 8-µm serial sections of a WT apex (A) and of a YFP probe in DR5:YFP apex (B). (C) Schematic presentation of the synthetic peGCC promoter composed of four repeats of the LFS (gray arrows) and the DRNL (white arrows) eGCC-box elements, followed by a 35S TATA-box (black rectangle). See Dataset S1, Table S5, for the full sequence. (D) lfs peGCC>>NLS:RFP. The presence of the transgenes was confirmed by PCR. (E) peGCC>>NLS:RFP TIBA pin. Red fluorescence was confirmed before TIBA application.