Figure 5.

CMADS1 RNA localization in sporophyte tissues as detected by in situ hybridization. (A) A longitudinal section through the terminal meristematic region of a stem showing the shoot apical meristem (sa), the leaf primordia (lp), and the procambium (p). (B) A longitudinal section of an adventitious shoot on the adaxial surface of a leaf showing the apical meristem (sa). (C–E) A series of transverse sections of a reproductive leaf at increasing distances from the tip shown in C showing leaf margins (l), the sporangium initial cells (s) that form on the abaxial surface of the leaf, and the procambium (p). (F) A transverse (ts) and a longitudinal section (ls) of two young vegetative leaves ≈1 cm in length. (G) Transverse section through the basal portion of the petiole of a young leaf 1 cm in length. x, xylem; px, protoxylem. (H) Longitudinal section of the growing tip of an adventitious root. ap, air passage; ra, root apical cell; rc, root cap. (I) Longitudinal section of the petiole and an adventitious root. v, vascular bundle of the petiole, which is continuous with the vascular bundle of the adventitious root. (Bar = 50 μm.)