Fig. 3. Short internodes in CUC2g-m4 result from a post-meristematic reduction of growth due to a combination of fewer and smaller cells. (A) Developmental series of flowers along the stem. Flowers are ordered from the top (left) to the bottom (right) of the inflorescence stem. Not all of the flowers of a CUC2g-m4 cluster (underlined) are at the same stage. (B) SEM views of the early phases of inflorescence development. Inflorescences were partially dissected to reveal the internodes. (C) Epidermal cell length and number of wild-type (10 mm long), short CUC2g-m4 (less than 1 mm long, yellow bars) or long CUC2g-m4 (30 mm long, red bars) internodes. Cell numbers per internode were calculated based on cell and internode lengths. Number of individuals measured (n) and standard deviations (bars) are indicated. (D) Epidermal cell size was measured on either the inside or the outside of twisted CUC2g-m4 stems. Scale bar: 0.5 mm in B.