Fig. 7

Effects of combination of abscisic acid (ABA) and PSK, AMP, and NAD at various concentrations on differentiation and maturation of somatic embryos from leaf explants of A. africana. (A) Globular shape embryos. (B) Heart shape embryos. (C) Torpedo shape embryos. (C) Cotyledonary shape embryos. All media (MS) contained 0.5 ABA, and all concentrations are in mg/L. Same letters are not significantly different by Tukey’s test and p ≤ 0.05.