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Diversity of the Fire Blight Pathogen in Production of Dihydrophenylalanine, a Virulence Factor of Some<i>Erwinia amylovora</i>Strains
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1991
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BiologyCultivated Pear CellsMedicineVirulence FactorGrowth InhibitionFire Blight PathogenPhytotoxin ProductionPlant PathologyPathogen CharacterizationMicrobiologyAntimicrobial CompoundBacterial PathogensPlant-pathogen InteractionAntimicrobial Resistance
Various Erwinia amylovora strains from different origins were assayed for phytotoxin production. When cultivated pear cells were embedded in solidified plant medium and inoculated with bacteria, a zone of growth inhibition was observed for some of the strains. A membrane-diffusible toxic compound was identified as L-2,5-dihydrophenylalanine (DHP), an inhibitor of the shikimic acid pathway (...)