title: Enhancement by potato virus Y of potato virus X synthesis in doubly infected tobacco depends on the timing of invasion by the viruses.
mesh_terms: D002499:Centrifugation, Density Gradient; D007181:Inclusion Bodies, Viral; D010935:Plant Diseases; D010942:Plant Viruses / Q000254:growth & development*; D010947:Plants, Toxic; D012328:RNA Viruses / Q000254:growth & development; D013997:Time Factors; D014026:Nicotiana; D014675:Vegetables; D014779:Virus Replication