Figure EV2. UV‐B represses the auxin responses and inhibits lateral root growth in a UVR8‐dependent manner.

• A
  Phenotypic analysis. Seedlings of the indicated genotypes were grown in 1/2 MS with the addition of a series of concentrations of NAA under either continuous white light or white plus UV‐B (1 W/m²) for 2 weeks. Images of representative seedlings are shown; scale bar = 5 mm.
• B, C
  GUS staining of seedlings expressing the DR5p::GUS transgene in the WT, uvr8, and rup1 rup2 mutant background. Seedlings of each indicated genotype were grown under LD conditions (16‐h light/8‐h dark) for 5 days, then transplanted to new medium containing 0.4 μM NAA, and kept in continuous white light or white light plus UV‐B (1 W/m²) for 7 days. Images of leaves (B) and lateral roots (C); scale bars = 50 μm.