VIEW ARTICLE

Ecology and Epidemiology

Plasmid, Genomic, and Bacteriocin Diversity in U.S. Strains of Xanthomonas campestris pv. oryzae. G. -W. Xu, Department of Plant Pathology and Microbiology, Texas A & M University, College Station 77843; C. F. Gonzalez, Department of Plant Pathology and Microbiology, Texas A & M University, College Station 77843. Phytopathology 81:628-631. Accepted for publication 10 January 1991. Copyright 1991 The American Phytopathological Society. DOI: 10.1094/Phyto-81-628.

Twenty-six strains of Xanthomonas campestris pv. oryzae isolated during a recent outbreak of bacterial leaf blight of rice in the United States were analyzed for their plasmid, genome, and bacteriocin diversity. Twenty of the strains harbored indigenous plasmid(s) and could be divided into three distinct groups. Restriction fragment length polymorphism (RFLP) analyses of genomic DNA revealed hybridization profiles that separated the strains into four groups. Four bacteriocin groups were identified among the strains tested. Five subgroups were identified based on plasmid content, RFLP analyses, and bacteriocin typing.