Abstract: In order to investigate the differences of volatile components in fruiting bodies of Tricholoma matsutake from different geographical areas,gas chromatographymass spectrometry (GC-MS) were used to detect the volatile components in T.matsutake fruiting bodies collected from five main producing areas in Sichuan.A total of 52 volatile components were identified in T.matsutake from five geographical origins.C₈ components like 1-octene,(E)-2-octenal,phenylacetaldehyde and other volatiles like hexanal,benzaldehyde,methyl cinnamate were detected in all samples and dominant in T.matsutake from different geographical origins.These volatile components account for more than 70% of detected volatiles.Moreover,the species and content of volatile components in T.matsutake from different geographical origins changed significantly.This lead to regional characteristics of T.matsutake from different geographical origins.The results also indicated that volatile composition can be affected by symbiotic tree or the environment.The result can be used as chemical indicators for the classification of T.matsutake from different geographical origins and provide some ideas to improve the quality of T.matsutake.

Key words: Tricholoma matsutake, volatile components, HS-SPME, GC-MS, C₈ components