Autor(es):
Nogueira, Liliana 
; Malheiro, R. ; Pinho, P. Guedes de ; Baptista, Paula
Data: 2010
Identificador Persistente: http://hdl.handle.net/10198/4590
Origem: Biblioteca Digital do IPB
Assunto(s): Volatile profile; Wild mushrooms; GC/IT-MS
Descrição
Trás-os-Montes region is considered one of the richest regions of Portugal concerning the existence of wild mushrooms. In the present work, was studied the volatile profile of three species of wild mushrooms, Hebeloma crustuliniforme, Clitocybe odora and Tricholoma fracticum. These species have different flavours, namely radish-, anise-like odor, and not distinctive or slightly mealy odor, respectively. The volatile fractions were determined in fresh mushrooms by headspace solid-phase microextraction (HS-SPME) combined with gas-chromatography/ion trap-mass spectrometry (GC/IT-MS).
Several volatile compounds were identified, belonging to different chemical classes. The three studied mushroom species reported different volatile profiles as presented in Figure 1. Meanwhile these species are mainly composed by alcohols and aldehydes, and in minor content by sesquiterpenes, terpenic compounds, esters, ketones and other chemical classes. 3-Octanol and 1-octanol were identified in the species contributing to their flavour. ρ-Anisaldehyde was only identified in Clitocybe odora and was the main volatile compound identified in this specie. It contributes with the characteristic anise smell of this mushroom, and could be also used as a chemical authenticity marker. Linalool was present in the three species in considerable amounts contributing with floral scents.
Overall the volatile profile of the three species contributes with characteristic fragrances, which allow recognizing each one of them.
