title: Comparative study of phytochemicals and antioxidant potential of wild edible mushroom caps and stipes.
abstract: A comparative study of the organic acids and phenolics composition and of the total alkaloids content of entire wild edible mushrooms (Russula cyanoxantha, Amanita rubescens, Suillus granulatus and Boletus edulis) and correspondent caps and stipes was performed. All species presented oxalic, citric, malic and fumaric acids, with A. rubescens exhibiting the highest total organic acids content. Organic acids were preferably fixed in the cap. Among phenolics, only p-hydroxybenzoic acid was found in A. rubescens and S. granulatus, in very low amounts. B. edulis was the species that presented the highest total alkaloid amounts. Except for this species, alkaloids mainly accumulated in the cap. All of the species exhibited a concentration-dependent scavenging ability against DPPH(·). B. edulis revealed the highest antioxidant capacity. The cap seemed to be the part with highest antioxidant potential. Some relationships between chemical composition and antioxidant capacity were considered.
authors.affiliation: REQUIMTE/Serviço de Farmacognosia, Faculdade de Farmácia, Universidade do Porto, R. Anı´bal Cunha, 164, 4050-047 Porto, Portugal.
authors.forename: Bárbara
authors.initials: B
authors.lastname: Ribeiro
authors.affiliation: REQUIMTE/Serviço de Farmacognosia, Faculdade de Farmácia, Universidade do Porto, R. Anı´bal Cunha, 164, 4050-047 Porto, Portugal.
authors.forename: Rosário
authors.initials: R
authors.lastname: Lopes
authors.affiliation: REQUIMTE/Serviço de Farmacognosia, Faculdade de Farmácia, Universidade do Porto, R. Anı´bal Cunha, 164, 4050-047 Porto, Portugal.
authors.forename: Paula B
authors.initials: PB
authors.lastname: Andrade
authors.affiliation: REQUIMTE/Serviço de Farmacognosia, Faculdade de Farmácia, Universidade do Porto, R. Anı´bal Cunha, 164, 4050-047 Porto, Portugal.
authors.forename: Rosa M
authors.initials: RM
authors.lastname: Seabra
authors.affiliation: REQUIMTE/Serviço de Farmacognosia, Faculdade de Farmácia, Universidade do Porto, R. Anı´bal Cunha, 164, 4050-047 Porto, Portugal.
authors.forename: Rui F
authors.initials: RF
authors.lastname: Gonçalves
authors.affiliation: CIMO/Escola Superior Agrária, Instituto Politécnico de Bragança, Quinta de Sta Apolónia, Apartado 1172, 5301-855 Bragança, Portugal.
authors.forename: Paula
authors.initials: P
authors.lastname: Baptista
authors.affiliation: REQUIMTE/Serviço de Farmacognosia, Faculdade de Farmácia, Universidade do Porto, R. Anı´bal Cunha, 164, 4050-047 Porto, Portugal.
authors.forename: Inês
authors.initials: I
authors.lastname: Quelhas
authors.affiliation: REQUIMTE/Serviço de Farmacognosia, Faculdade de Farmácia, Universidade do Porto, R. Anı´bal Cunha, 164, 4050-047 Porto, Portugal. Electronic address: valentao@ff.up.pt.
authors.forename: Patrı Cia
authors.initials: PC
authors.lastname: Valentão
keywords: Alkaloids; Antioxidant potential; Organic acids; Phenolic compounds; Wild edible mushrooms