Saprophytic Pseudomonas syringae strain M1 of wheat produces cyclic lipodepsipeptides

A saprophytic fluorescent bacterium (strain M1) isolated from wheat was identified as Pseudomonas syringae and shown to produce the cyclic lipodepsipeptides, syringomycin E and syringopeptin SP25A. M1 grew in planta but did not affect germination or cause disease symptoms in wheat. The findings show that the production of these metabolites, generally regarded as plant virulence factors, does not correlate with plant pathogenicity.