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Relationship of Datura Quercina and Tobacco Streak Viruses. J. R. Edwardson, Departments of Agronomy and Plant Pathology, Plant Virus Laboratory, University of Florida, Gainesville 32611; D. E. Purcifull, Departments of Agronomy and Plant Pathology, Plant Virus Laboratory, University of Florida, Gainesville 32611. Phytopathology 64:1322-1324. Accepted for publication 13 May 1974. DOI: 10.1094/Phyto-64-1322.

Datura quercina virus (DQV) and tobacco streak virus (TSV) (strain HF) were compared cytologically in thin-sections of tobacco and Datura stramonium leaves, and serologically in immunodiffusion tests. The inclusions induced in D. stramonium by the two viruses were indistinguishable. The two viruses reacted identically with TSV antiserum, indicating that they are closely related strains.