Somatic
Embryogenesis
It has been demonstrated that embryo development is not the monopoly of egg cell and that any cell of the embryo sac or any other part of the sporophyte may give rise- to an embryo. However, in nature, embryos can not develop outside the ovules, although in several species (Citrus, Mangifera), adventive embryos (embryos developing from sporophytic tissue) may develop from nucellar cells or integuments of the ovule, outside the embryo sac.
These embryos, however, mature, only when pushed into the embryo sac, suggesting that embryo sac should have a special environment, which facilitates the development of embryo .and the same should be made available in culture if somatic embryogenesis needs to be induced.