Wild mushrooms as a possible source of nutraceuticals – Use of chromatographic techniques to obtain the species chemical profile

• Main Author: Reis, Filipa S.
• Publication Date: 2017
• Other Authors: Martins, Anabela, Barros, Lillian, Vasconcelos, M. Helena, Morales, Patricia, Ferreira, Isabel C.F.R.
• Language: eng
• Source: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
• Download full: http://hdl.handle.net/10198/15696

Although mushrooms use has been reported for thousands of years, it has only been in recent years that the consumption of mushrooms has increased, mainly due to the increasing awareness that a stable and balanced diet exerts a key role in normal body functioning and sustaining health [1]. Indeed, some authors consider mushrooms as “inherent functional foods” [2]. This work presents the profiles of fatty acids, tocopherols and phenolic acids of two wild species from the genus Suillus, namely S. granulatus and S. luteus. Fatty acids were determined by GC-FID, tocopherols were analysed by HPLC coupled to a fluorescence detector, and phenolic acids by HPLC-PDA. Oleic and linoleic acids were the prevailing fatty acids detected in both species (31 – 57% of total fatty acids). Regarding the tocopherols profile, the main vitamers quantified in S. granulatus were the β- and δ- tocopherols (175 and 102 μg/100 g dw, respectively), while the main vitamer found in S. luteus was γ- tocopherol (337 μg/100 g dw). Gallic and p-hydroxybenzoic acids, as also the related compound cinnamic acid, were identified in S. granulatus (0.1 – 0.5 mg/100 g dw); protocatechuic acid was the only phenolic acid detected in S. luteus (0.5 mg/100 g dw), as well as the related compound cinnamic acid (0.4 mg/100 g dw). With this work, we were able to confirm that mushrooms can be a source of nutraceuticals, such as unsaturated fatty acids, vitamins and phenolic compounds. We could also conclude that species from the same genus, can present a similar chemical profile, but since mushrooms are highly influenced by the environmental conditions, the samples may present some differences between them.