title: Ultrastructural morphology of the nucleolar organizing region.
mesh_terms: D002466:Cell Nucleolus; D002843:Chromatin; D002875:Chromosomes; D005737:Garlic / Q000166:cytology*; D006652:Histological Techniques; D008540:Meiosis; D008854:Microscopy, Electron; D008858:Microscopy, Phase-Contrast; D010946:Plants, Medicinal; D013170:Spores / Q000166:cytology*
chemical_list: D002843:Chromatin