Abstract

Three strains of Pseudomonas syringae pv. glycinea from Glycine wightii (previously Glycine javanica) were found to have toxin-producing characteristics suggesting the presence of phaseolotoxin, which was confirmed by a chemical examination of the toxin. With the use of pathogenicity tests, serology tests and toxin characterizations, these 3 strains were compared with 5 strains of P. syringae pv. glycinea from Glycine max and 4 strains of P. syringae pv. phaseolicola. The results showed that the 3 strains from G. wightii were P. syringae pv. phaseolicola rather than pv. glycinea as previously recorded. Pathogenicity tests with a variety of P. syringae pv. phaseolicola strains demonstrated that G. wightii is a host for this organism.

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