VOLATILE COMPOUNDS IN THE AROMA OF THREE SPECIES OF WOOD-ROTTING BASIDIOMYCETES AND THEIR ANTIFUNGAL POTENTIAL

Abstract

This study aims to determine the volatile organic compounds synthesized by three species of wood-rotting basidiomycetes: Coriolopsis gallica, Megacollybia platyphylla and Lentinus arcularius and test their antifungal potential. The species were cultivated on liquid media and kept for 25 days at 25 °C. The surface cultures were then homogenized, filtrated and extracted using solid-phase extraction and analyzed by GC-MS. The volatile compounds identified were mainly alcohols, ketones, aldehydes and terpenes. The most common volatiles identified in the experiment are: 1-octen-3-ol, 3-hexanol, 3-methyl-1-butanol, 3-octanone, 2-hexanone, benzaldehyde, and limonene. The volatiles metabolites of these species were tested for their antifungal activity using the bi-compartmented Petri dishes method against two species of plant pathogenic fungi: Fusarium solani and Sclerotinia sclerotiorum, on three media. The volatiles produced by Coriolopsis gallica showed the highest antifungal potential against the phytopathogens. The results revealed the importance of media composition in the synthesis of antifungal volatile compounds.

Keywords

• antifungal compounds
• Coriolopsis gallica
• Lentinus arcularius
• Megacollybia platyphylla
• volatile metabolites