title: Ultrastructural visualization of nucleolar organizer activity during early germination of Zea mays L.
mesh_terms: D001345:Autoradiography; D008854:Microscopy, Electron; D009697:Nucleolus Organizer Region / Q000648:ultrastructure*; D012313:RNA / Q000235:genetics; D012639:Seeds / Q000648:ultrastructure; D014158:Transcription, Genetic; D003313:Zea mays / Q000235:genetics* / Q000648:ultrastructure
chemical_list: D012313:RNA