2003•Journal of Agricultural and Food ChemistryRequires access

Viridepyronone, a New Antifungal 6-Substituted 2H-Pyran-2-one Produced by Trichoderma viride

Antonio Evidente, Annalisa Cabras, Lucia Maddau, S. Serra, Anna Andolfi, Andréa Motta

Abstract

A new antifungal 6-substituted 2 H -pyran-2-one, named viridepyronone, has been isolated from a cultural filtrate of a strain of Trichoderma viride showing antagonistic activity in vitro toward Sclerotium rolfsii, which is the causal agent of crown and stem rot of artichoke. Viridepyronone was characterized as 6-(4-oxopentyl)-2 H -pyran-2-one 2 with spectroscopic methods. Bioassays showed that viridepyronone had a good antifungal activity against S. rolfsii, and its minimum inhibitory concentration (over 90% inhibition) was found to be 196 μg/mL. This is the first report of viridepyronone produced by any species of fungi. Keywords: Trichoderma viride; pyran-2-one; viridepyronone; antifungal activity; Sclerotium rolfsii; crown and stem rot; biocontrol

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Key concepts: Sclerotium, Trichoderma viride, Antifungal, Pyran, Trichoderma, Bioassay, Chemistry, Biology