Figure 1.

rsf1 mutants are impaired in inhibition of hypocotyl elongation in FR and blue light. Data are means ± 2× se of at least 12 seedlings for each light treatment. All seedlings were grown at 22°C in continuous light. A, Col (black bar), rsf1 (white bar), and the appropriate photoreceptor mutants were grown for 6 d in 30 μmol m⁻² s⁻¹ blue (hy4, gray bar), 15 μmol m⁻² s⁻¹ R (phyB-9, hatched to the left bar), or 10 μmol m⁻² s⁻¹ FR (phyA-211, hatched to the right bar). B, Fluence rate response curve in continuous FR light of Col, rsf1, and phyA-211 seedlings. C, Fluence rate response curve in continuous R light of Col, rsf1, and phyB-9 seedlings.