Figure 4.

The FRD3 Promoter Is Active during Embryogenesis and the Early Stages of Germination.

GUS histochemical staining of a representative proFRD3:GUS transgenic line.

(A) to (C) Dissected embryos from green siliques ([A] and [B]) or a dry seed (C).

(D) to (F) Seedling after 1 d (D), 3 d (E), or 5 d (F) of germination.

(G and H) Longitudinal section of a dry seed showing the embryo (G) or the seed envelope (H).

(I) Close-up image of the hypocotyl-root transition zone of a 5-d-old seedling. Scale bars = 50 μm