Differentiation of Xanthomonas translucens f.sp. oryzicola (Fang et al.) Bradbury, the Leaf-Streak Pathogen, from Xanthomonas oryzae (Uyeda and Ishiyama) Dowson, the Blight Pathogen of Rice, by Enzymatic Tests

Isolates of Xanthomonas translucens f.sp. oryzicola readily produced phenylalanine deaminase 1 day after inoculation and tyrosinase and β-glucosidase 4 days after inoculation, but isolates of Xanthomonas oryzae showed no such enzymatic activities by the methods employed. These differences easily distinguish bacterial blight of rice (caused by X. oryzae) from leaf streak of rice (caused by X. translucens f.sp. oryzicola).