Figure 2.

Hypocotyl-growth responses of wild-type and hy1 mutants of A. thaliana. Wild-type Ler and Col, the homozygous hy1 mutants [hy1–1, hy1–100, and hy1–2 (formally called hy)], and the compound-heterozygous progeny from crosses of hy1–1 with hy1–2 and hy1–100 were irradiated for 5 days with ≈22 μmol m⁻²⋅s⁻¹ of continuous white light after germination. Each bar represents the average hypocotyl length (±SD) of at least 10 seedlings. Values are represented as the percentage of the mean of the respective wild-type parent. For the compound heterozygotes containing two wild-type backgrounds, the average of the Ler and Col values was used.