Arrest of inflorescence and floral meristem by constitutive FAF expression. (A) Phenotype of an intermediate 35S::FAF3 plant. The inflorescence meristem of the main shoot has arrested growth (arrow and lower inset). Flowers derived from arrested meristems also display a growth arrest phenotype (upper inset). (B and C) Longitudinal section through wild-type (B) and 35S::FAF3 inflorescences (C) stained with toluidine blue. (D) Quantification of inflorescence meristem width in control and 35S::FAF plants. Meristem width is reduced in all four FAF overexpressing lines by approximately 30%. Scale bar: 100 μm; error bars: standard deviation (SD), n≥15.