title: Cytoplasmic induction of changes in the ultrastructure of the Acetabularia nucleus and perinuclear cytoplasm.
abstract: The ultrasturcture of the cell nucleus and perinuclear cytoplasm in Acetabularia is quite different in young and old cells. When a nucleus of an old cell was implanted into the cytoplasm of a young cell the nucleus assumed the morphology typical of a young cell within less than 10 days. The cytoplasm of an old cell was able to induce the reverse change in an implanted nucleus from a young cell. This cytoplasmic induction of nuclear ageing appeared to proceed more rapidly than rejuvenation.
mesh_terms: D000076:Acetabularia / Q000648:ultrastructure*; D002466:Cell Nucleolus / Q000648:ultrastructure; D002467:Cell Nucleus / Q000648:ultrastructure*; D000460:Chlorophyta / Q000648:ultrastructure*; D003584:Cytological Techniques; D003593:Cytoplasm / Q000502:physiology / Q000648:ultrastructure*; D008854:Microscopy, Electron; D013997:Time Factors