The phyA-205 has a dominant-negative phenotype and is not dependent on Suc concentration. Average hypocotyl lengths (in millimeters) are shown above each seedling (n = 25) with the sd shown in parentheses. A, Phenotypic comparison of 3-d-old FR light-grown phyA-205 homozygous (−/−), heterozygous (−/+), and wild-type (WT) seedlings on 0.3% (w/v) Suc medium. B, Phenotypic comparison of 3-d-old FR light-grown phyA-205 homozygous (−/−), heterozygous (−/+), and wild-type (WT) seedlings on 2% (w/v) Suc medium.