Expression of DR5rev:GFP during embryogenesis. A to C, DR5rev:GFP distribution in wild-type embryos at the triangular stage (A), early heart stage (B), and late heart stage (C). D to F, DR5rev:GFP distribution in embryos dissected from smo2-1 smo2-2/+ siliques at the triangular stage (D), early heart stage (E), and late heart-like stage (F). Bars = 25 μm (A and C–E) and 10 μm (B and F).