Isolation and characterization of a Pseudomonas syringae pv. syringae mutant deficient in lesion formation on bean.

We identified a Tn5 mutant, derived from the pathogenic strain B728a, that had lost the ability to form lesions on either the pods or leaves of bean (Phaseolus vulgaris). By restriction analysis we have localized the lemA locus within a 6.7-kb region of the B728a chromosome