preceded by preceded_by plant embryo globular stage plant embryo bilateral stage PO_GIT:400 PO:0001177 triangle stage in Arabidopsis (related) PO:0001043 transition stage in maize (related) PO:0004507 A plant embryo development stage (PO:0007631) that occurs during the interval between the transition from radial to bilateral symmetry in a plant embryo proper (PO:0000001) and the onset of either the plant embryo cotyledonary stage (PO:0001078) or the plant embryo coleoptilar stage (PO:0001094). heart stage in Arabidopsis (related) heart-shape stage (related) A plant embryo bilateral stage is commonly known as the heart stage in dicotyledonous plants and the transition stage in monocots. Preceded by a plant embryo globular stage (PO:0001185). plant_structure_development_stage plant embryo development stage