This study was carried out to evaluate the effect of different photoperiods on the formation of somatic embryos, assess the effect of BAP and GA 3 on embryo development and germination, and carry out an anatomical analysis of somatic embryogenesis of cassava. Prolonged photoperiods markedly increased the number of explants that formed somatic embryos. BAP was not basic to the development of somatic embryos, whereas GA 3 was fundamental to embryo germination and their transformation into plants. The induction and differentiation of the embryogenicicells involved the pro-mesophyll of the inmature leaves, in particular. Embryo formation in cassava follows a pattern of multicellular origin.
