diaporthin and 4-hydroxyphenyllactic-acid

Investigations carried out on secondary metabolites produced in culture by a hypovirulent strain of Cryphonectria parasitica allowed the isolation of several compounds which were characterized by NMR analysis and derivatization reactions. The most abundant metabolite was a new compound, called cryphonectric acid (1). Other metabolites were diaporthin, the only known phytotoxic compound isolated from both virulent and hypovirulent strains of C. parasitica, (+)-orthosporin, and L-p-hydroxyphenyllactic acid (HOPLA). Root growth activity of the purified compounds was evaluated both on tomato seedlings and maize subapical segments.

Topics: Ascomycota; Benzofurans; Chromatography, High Pressure Liquid; Inhibitory Concentration 50; Mass Spectrometry; Molecular Structure; Nuclear Magnetic Resonance, Biomolecular; Phenylpropionates; Plant Development; Plant Roots; Plants; Pyrones; Solanum lycopersicum; Spectrometry, Mass, Electrospray Ionization; Spectrophotometry, Infrared; Stereoisomerism; Zea mays