Figure 6.

GR24 treatment results in decreased intensities of the auxin reporter DR5-GUS in aerial parts of the plant. A and B, Close-up of a leaf of an untreated (B) and GR24-treated (C) max4-1 plant. Arrows point at the locations where developing vasculature is either present (A) or absent (B). C, GUS staining of the leaves of 12-d-old max4-1 and max2-1 plants carrying the DR5-GUS transgene grown in the presence or absence of 2.5 μm GR24 showing that the decrease in GUS intensities is dependent on MAX2.