(A) Expression of IDD14, IDD15, and IDD16 in seedlings assayed by GUS staining. The 12-day-old transgenic seedlings carrying pIDD14::GUS, pIDD15::GUS, or pIDD16::GUS constructs were subjected to GUS staining assays. Insets show the primary roots. The scale bar represents 1 mm. (B) GUS staining of the florescence stems of pIDD14::GUS, pIDD15::GUS, and pIDD16::GUS transgenic plants. Insets show the transverse sections of inflorescence stems. The scale bar represents 2 mm. (C) GUS staining of the floral organs of pIDD14::GUS, pIDD15::GUS, and pIDD16::GUS transgenic plants. The scale bar represents 1 mm. (D) Expression of IDD14, IDD15, and IDD16 in inflorescence stems assayed by RNA in situ hybridization. A section hybridized with an IDD16 sense probe is shown as a control. The scale bar represents 50 µm.