title: A comparison of the ultrastructure of nuclei in situ with that of nuclei isolated from the root meristem of Pinus silvestris.
mesh_terms: D002458:Cell Fractionation / Q000379:methods; D002467:Cell Nucleus / Q000648:ultrastructure*; D002843:Chromatin / Q000648:ultrastructure; D005990:Glycerol; D006651:Histocytochemistry; D008854:Microscopy, Electron; D010944:Plants / Q000648:ultrastructure*
chemical_list: D002843:Chromatin; D005990:Glycerol