Figure 3.

Epidermal phyB Inhibits Hypocotyl Elongation in Response to Red Light.

(A) Epidermal phyB inhibits hypocotyl elongation. Seedlings were grown for 4 d under continuous red light (Rc; 11.4 μmol m⁻² s⁻¹) or in the dark (Dc). Bar = 5 mm.

(B) Hypocotyl lengths for the various tissue-specific phyB lines. White bars dark-grown seedlings (Dc), and black bars indicate red light-grown seedlings (Rc). Error bars indicate sd (n = 60 seedlings).

(C) Epidermal phyB restores EOD-FR responses. Seedlings were grown either in long days for 6 d (LD) or in long days for 2 d followed by 4 d of EOD-FR. Pairs of seedlings are shown for each tissue-specific line. The left seedling of each pair was long-day grown (−) and the right was EOD-FR treated (+). Bar = 5 mm.

(D) Hypocotyl lengths for each tissue-specific phyB line. White bars indicate long-day-grown seedlings, and black bars indicate EOD-FR-treated seedlings. Error bars indicate sd (n = 60 seedlings).