A New Race ofPseudomonas glycinea

Abstract

The pathogenic response of 7 soybean cultivars to a previously undescribed race of P. glycinea [syringae] is reported. The pathogenic response in terms of resistance and susceptibility is described. Similarities to selected characteristics of the 7 previously described races, specifically pigment production and xylose utilization, were studied. The value of relying on nutritional tests for bacterial species differentiation is considered, since mutants of the new race which mimic some of the other races were isolated. A convention for the use of biochemical tests is proposed.