title: Descriptive and quantitative study of ultrastructural changes in the apical meristem of mustard in transition to flowering. I. The cell and nucleus.
mesh_terms: D001699:Biometry; D002466:Cell Nucleolus / Q000648:ultrastructure; D002467:Cell Nucleus; D002843:Chromatin / Q000648:ultrastructure; D008854:Microscopy, Electron; D009149:Mustard Plant / Q000254:growth & development / Q000648:ultrastructure; D063245:Plant Development; D010944:Plants / Q000648:ultrastructure*; D010946:Plants, Medicinal; D012270:Ribosomes; D013997:Time Factors
chemical_list: D002843:Chromatin