Figure 5.

Plant material used to perform cell length measurement. Embryonic stages and localization of the epidermal cells used for measurements. A, Middle stage embryo whose first leaf primordium approximately covers one-half of the shoot meristem. B, Older embryo whose first leaf primordium covers the shoot meristem. ab, Abaxial scutellum epidermis; ad, adaxial scutellum epidermis; cr, coleoptilar ring; lp, first leaf primordium; sc, scutellum; sm, shoot meristem. Arrows indicate cell length measurement areas.