Fig. 2.

Histology of a barley androgenic embryo at a mature stage of development. a At this stage, androgenic embryos consisted of a shoot and a root meristem, a coleorhiza, a scutellum and 4–6 leaf primordia. In addition to the main root, adventitious roots were also present. b The protodermis of the scutellum consisted of narrow cells. ar adventitious root, col coleorhiza, lp leaf primordia, rm root meristem, sc scutellum, sm shoot meristem. Longitudinal sections through the embryo stained with PAS + toluidine blue. Bars = 300 µm (a), 30 µm (b)