Isolation and structural elucidation of syringostatins, phytotoxins produced by Pseudomonas syringae pv. syringae lilac isolate

Abstract

A bacterial strain of Pseudomonas syringae pv. syringae isolated from lilac was found to produce a homologous mixture of phytotoxins different from syringomycin and syringotoxin. The toxins were termed Syringostatins and the structures of the main components, Syringostatins A and B, were determined by 2D-NMR spectroscopy and mass spectrometry. Minor component structures were elucidated from mass/mass spectra.