title: [Nucleolar structure during the prophase of Physarum polycephalum].
abstract: With Sugihara's fixation technique, electron microscopic study of early-prophase nucleolus in the Physarm polycephalum showed the existence of particular fibrillar structures. The characteristic feature of these spherical structures is an electron-lucid center surrounded by a dense fibrillar component. Their relationships between the "fibrillar centers" and between the rate of ribosomal RNA synthesis are studied.
mesh_terms: D000818:Animals; D002455:Cell Division; D002466:Cell Nucleolus / Q000502:physiology / Q000648:ultrastructure*; D009235:Myxomycetes / Q000502:physiology*; D010804:Physarum / Q000502:physiology*; D012335:RNA, Ribosomal / Q000096:biosynthesis
chemical_list: D012335:RNA, Ribosomal
vernacular_title: Structures nucléolaires au cours de la prophase de Physarum polycephalum.