title: Intranuclear complexes in a copper-tolerant green alga.
abstract: The results of ultrastructural studies and transmission electron microscope microanalysis of two Scenedesmus strains experimentally exposed to copper sulfate are presented. A fine-structural examination of the cells revealed the presence of nuclear inclusions in the form of central dense-core complexes. Cytoplasmic structures resembling the intranuclear inclusions were occasionally found in the cells. TEM-X-ray microanalysis of these structures has provided evidence that the inclusions contain copper. It is concluded that their presence may be regarded as a detoxifying mechanism.
mesh_terms: D002466:Cell Nucleolus / Q000648:ultrastructure; D002467:Cell Nucleus / Q000648:ultrastructure; D000460:Chlorophyta / Q000648:ultrastructure*; D003300:Copper / Q000032:analysis*; D014617:Vacuoles / Q000648:ultrastructure
chemical_list: D003300:Copper