title: [Autoradiographic study of ribonucleic acid metabolism during oogenesis of Lineus ruber Müller (Heteronemertes)].
abstract: During Lineus ruber oogenesis, there is a very high uridine uptake by the oocyte before the yolk formation. At the end of this stage, the nucleolus shows a special structure that seems to be related to a decrease of the ribosomal RNA synthesis. During the yolk formation, the nucleolus scatters in the nucleus, allowing ribonucleoprotein granules to go towards the cytoplasm.
mesh_terms: D000818:Animals; D001345:Autoradiography; D002466:Cell Nucleolus / Q000378:metabolism*; D003593:Cytoplasm / Q000378:metabolism; D005260:Female; D008854:Microscopy, Electron; D009865:Oocytes / Q000648:ultrastructure; D009866:Oogenesis; D010986:Platyhelminths / Q000378:metabolism*; D012313:RNA / Q000378:metabolism*; D012335:RNA, Ribosomal / Q000096:biosynthesis / Q000378:metabolism; D014529:Uridine / Q000378:metabolism
chemical_list: D012335:RNA, Ribosomal; D012313:RNA; D014529:Uridine
vernacular_title: Etude autoradiographique du métabolisme des acides ribonucléiques nucléolaires au cours de l'ovogenèse de Lineus ruber Müller (Hétéronémertes)