has_participant has participant has participant mature plant embryo stage sporophyte dormant stage plant embryo plant embryo dormant stage PO_GIT:426 embryo dormant stage (broad) 植物胚休眠期 (Japanese, exact) During a plant embryo dormant stage, a plant embryo participates in a dormancy process, but not all plant embryos have a dormant stage. A dormancy process (GO:0022611) is a developmental process in which dormancy (sometimes called a dormant state) is induced, maintained or broken. Dormancy is a suspension of most physiological activity and growth that can be reactivated. In seed plants, a plant embryo dormant stage may be part of a seed dormant stage. 2012-01-05T10:50:10Z plant_structure_development_stage PO:0025377 rwalls A mature plant embryo stage (PO:0001081) during the interval between when a plant embryo (PO:0009009) begins a dormancy process (GO:0022611) and one of the following: the beginning of the seed germination stage (PO:0007057) in seed plants, formation of the first vascular leaf (PO:0009025) in pteridophytes, the beginning of development of a sporangium (PO:0025094) in bryophytes, or the beginning of the formation of a plant organ (PO:0009008) such as a root (PO:0009005), shoot axis (PO:0025029), or vascular leaf (PO:0009025) in a cultured plant embryo (PO:0000010).