Identification of a Plasmid DNA Probe for Detection of Strains ofErwinia herbicolaPathogenic onGypsophila paniculata

Abstract

Pathogenic strains of Erwinia herbicola incite crown and root galls in Gypsophila paniculata. Two serotypic groups were detected in the population of strains isolated from Gypsophila, each of which was composed of pathogens and nonpathogens. An additional isolate of pathogenic E. herbicola did not react with serotype I or II. Galls caused by pathogenic serotype I strains varied in morphological appearance from galls of other pathogenic strains. All strains secreted indoleaceticacid (IAA) in culture. No correlation was observed between gall size and the amount of IAA produced in vitro (...)