has part has part has_part protoderm portion of meristem tissue apical meristem primary meristem (related) A maximal portion of meristem tissue (PO:0009013) located at a shoot apex (PO:0000037) or root tip (PO:0000025). promeristem (broad) 頂端分裂組織 (Japanese, exact) AM (exact) plant_anatomy PO:0020144 meristema apical (Spanish, exact) PO_GIT:579