Fig. 4. Regulation of the EGL3::GUS expression pattern. Expression of the EGL3::GUS reporter in the developing root epidermis of 4-day-old seedlings in mutant backgrounds and transgenic overexpressing lines. (A) EGL3 promoter activity is expanded in the epidermis of the wer and ttg lines, but unaffected by the gl2 and rhd6 backgrounds. (B) EGL3 promoter activity is reduced in the cpc try line (but not significantly affected in either single mutant), and it is expanded in the epidermis of the 35S::CPC and 35S::TRY backgrounds. (C) EGL3 promoter activity is expanded in the epidermis of the gl3 egl3 line (but not in either single mutant), and it is reduced in the 35S::GL3 and 35S::EGL3 backgrounds.