Erwinia amylovora Auxotrophic Mutant Exometabolomics and Virulence on Apples.

The Gram-negative bacterium causes fire blight disease of apples and pears. While the virulence systems of have been studied extensively, relatively little is known about its parasitic behavior. The aim of this study was to identify primary metabolites that must be synthesized by this pathogen for full virulence.