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The dgcH mutant has elevated virulence. The virulence of the wild type, the dgcH mutant, and the dgcH mutant complemented with wild-type dgcH in a Chinese cabbage leaf virulence assay was assessed. The numbers of bacterial cells (indicated as CFU) present in 1 mg of cabbage midrib at 3 days postinjection are shown. Error bars were calculated from three independent experiments. A representative picture of infected midribs is also shown for each strain.
