title: Phenolic, polysaccharidic, and lipidic fractions of mushrooms from northeastern Portugal: chemical compounds with antioxidant properties.
abstract: Mushrooms do not constitute a significant portion of the human diet, but their consumption continues to increase due to their functional benefits and presence of bioactive compounds. Some of those compounds can be found in the phenolic, polysaccharidic, and lipidic fractions of edible and inedible species. Herein, those fractions of five wild mushrooms (Coprinopsis atramentaria, Lactarius bertillonii, Lactarius vellereus, Rhodotus palmatus, and Xerocomus chrysenteron) from northeastern Portugal were studied for their chemical composition and antioxidant properties. Protocatechuic, p-hydroxybenzoic, p-coumaric, and cinnamic acids were found in the phenolic fraction; rhamnose, xylose, fucose, arabinose, fructose, glucose, manose, mannitol, sucrose, maltose, and trehalose were quantified in polysaccharidic fraction; and linoleic and stearic (only in Lactarius sp.) acids, and β- and γ-tocopherols were the main compounds in the lipidic fraction. C. atramentaria and X. chrysenteron phenolic fractions gave the highest free radical scavenging activity, reducing properties, and lipid peroxidation inhibition in brain homogenates, which is in agreement with its highest content in total phenolics. Furthermore, among the polysaccharidic fractions C. atramentaria also gave the highest antioxidant activity, which is in agreement with its highest total polysaccharides content and sugars obtained after hydrolysis.
authors.affiliation: Centro de Investigação de Montanha, Escola Superior Agrária, Campus de Santa Apolónia, apartado 1172, 5301-854 Bragança, Portugal.
authors.forename: Sandrina A
authors.initials: SA
authors.lastname: Heleno
authors.forename: Lillian
authors.initials: L
authors.lastname: Barros
authors.forename: Anabela
authors.initials: A
authors.lastname: Martins
authors.forename: Maria João R P
authors.initials: MJ
authors.lastname: Queiroz
authors.forename: Celestino
authors.initials: C
authors.lastname: Santos-Buelga
authors.forename: Isabel C F R
authors.initials: IC
authors.lastname: Ferreira
mesh_terms: D000363:Agaricales / Q000737:chemistry; D000970:Antineoplastic Agents / Q000032:analysis / Q000737:chemistry / Q000494:pharmacology; D000975:Antioxidants / Q000032:analysis / Q000737:chemistry / Q000494:pharmacology*; D001487:Basidiomycota / Q000737:chemistry*; D001688:Biological Products / Q000737:chemistry / Q000494:pharmacology*; D002934:Cinnamates / Q000032:analysis / Q000494:pharmacology; D055808:Drug Discovery; D015227:Lipid Peroxidation / Q000187:drug effects; D008055:Lipids / Q000032:analysis / Q000494:pharmacology*; D010636:Phenols / Q000032:analysis / Q000494:pharmacology*; D011134:Polysaccharides / Q000032:analysis / Q000494:pharmacology*; D011174:Portugal
chemical_list: D000970:Antineoplastic Agents; D000975:Antioxidants; D001688:Biological Products; D002934:Cinnamates; D008055:Lipids; D010636:Phenols; D011134:Polysaccharides