title: Superinfection by strains of tobacco streak virus.
mesh_terms: D000898:Antibiosis; D005814:Genes, Viral; D010942:Plant Viruses / Q000235:genetics / Q000254:growth & development* / Q000648:ultrastructure; D010947:Plants, Toxic; D013045:Species Specificity; D014026:Nicotiana / Q000382:microbiology*