Fig. 10

Histological observation of direct somatic embryogenesis in A. africana from leaf explants. (A) Histological section of globular somatic embryo. (B) Histological section of heart stage somatic embryo. (C) Histological section of torpedo stage somatic embryo. (D) Histological section of cotyledonary somatic embryo. cp.: cotyledon primordia, mp: mother plant, se: somatic embryo, su: suspensor, vb: vascular bundle. Bars: (b, d) = 0.100 mm, (a, c) = 0.200 mm.