| Self-incompatibility mechanisms have traditionally been found to operate in styles with either a sporophytic or gametophytic incompatibility system. |
| Following germination, sporophytic embryo tissue was separated from surrounding female gametophytic tissue. |
| In charophytes, the first cell division of the zygote is meiosis, and their plant body is gametophytic. |
| Other notable cytological features are highly pleomorphic plastids and mitochondrial aggregates in the gametophytic placental cells. |
| Seed development requires co-ordinated expression of embryo and endosperm and is controlled by sporophytic, male gametophytic, and female gametophytic genes. |
| In both species there are several layers of cells with labyrinthine walls on both the sporophytic and gametophytic side of the placenta. |
