1887

Abstract

causes necrotic lesions in eggplant and rot in lettuce. Through transposon insertion into strain SPC9018 we produced two mutants, 4-57 and 2-99, that lost virulence on eggplant but not lettuce. Analyses showed that a transposon was inserted into the gene in 4-57 and the gene in 2-99. Nucleotide sequences of the genes of SPC9018 are homologous to those of BS group strains. The pathogenicity of 4-57 on eggplant was restored by transformation with an operon, originating from either SPC9018 or the BS group member strain 9504 (Pv9504). These data suggested the involvement of genes in the pathogenicity of SPC9018 on eggplant, and functional conservation of operons between SPC9018 and Pv9504. Both the mutant and the mutant were unable to cause necrotic lesions on eggplant leaves but retained their pathogenicity against lettuce. These results suggest that the pathogenicity of is -dependent in eggplant, but not in lettuce.

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2008-10-01
2020-04-10
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