In situ hybridization of OsGA3ox1 and OsGA3ox2 transcripts in germinating embryo. Longitudinal sections through rice embryos fixed after 24 h of imbibition were hybridized with digoxigenin-UTP-labeled OsGA3ox1 (B and F) and OsGA3ox2 (A and E) antisense probes. E and F, Higher magnification views of epithelium cell layers. The section was hybridized with the sense probe for OsGA3ox1 (D) or OsGA3ox2 (C) as control experiment. SA, Shoot apex; R, root; Sc, scutellum; Ep, epithelium. Bar indicates 500 μm.