title: Antioxidant activities and quali-quantitative analysis of different Smallanthus sonchifolius [(Poepp. and Endl.) H. Robinson] landrace extracts.
abstract: Five landraces of Smallanthus sonchifolius [(Poepp. and Endl.) H. Robinson], known as yacon, were investigated in total phenolic content, antioxidant activity and chemical composition of ethanol extracts (EEs) and decoction extracts (DEs). The results demonstrated that DEs are rich in phenolic acids as caffeic acid, while the EEs show an higher amount of flavonoids, as luteolin 3',7-O-diglucoside and luteolin 7-O-glucoside. These flavonoid glycosides were identified for the first time in yacon extracts, together with apigenin and luteolin. The phytochemical profile explains the different antioxidant activities shown in our study. The landraces PER6-DE and PER4-DE showed the highest radical-scavenging activity and reducing power related to their polyphenolic contents. Results also show that yacon can be considered an important source of bioactive compounds with significant differences among the analysed landraces.
authors.affiliation: a Dipartimento di Scienze , Università degli Studi della Basilicata , Viale dell'Ateneo Lucano 10, 85100 Potenza , Italy.
authors.forename: D
authors.initials: D
authors.lastname: Russo
authors.forename: N
authors.initials: N
authors.lastname: Malafronte
authors.forename: D
authors.initials: D
authors.lastname: Frescura
authors.forename: G
authors.initials: G
authors.lastname: Imbrenda
authors.forename: I
authors.initials: I
authors.lastname: Faraone
authors.forename: L
authors.initials: L
authors.lastname: Milella
authors.forename: E
authors.initials: E
authors.lastname: Fernandez
authors.forename: N
authors.initials: N
authors.lastname: De Tommasi
mesh_terms: D000975:Antioxidants / Q000737:chemistry*; D047310:Apigenin / Q000737:chemistry; D019659:Asteraceae / Q000737:chemistry*; D002109:Caffeic Acids / Q000737:chemistry; D002851:Chromatography, High Pressure Liquid; D005419:Flavonoids / Q000737:chemistry; D005960:Glucosides / Q000737:chemistry; D047311:Luteolin / Q000737:chemistry; D015394:Molecular Structure; D010636:Phenols / Q000737:chemistry; D010936:Plant Extracts / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry
chemical_list: D000975:Antioxidants; D002109:Caffeic Acids; D005419:Flavonoids; D005960:Glucosides; D010636:Phenols; D010936:Plant Extracts; C585087:luteolin 3',7-di-O-glucoside; D047310:Apigenin; C066408:luteolin-7-glucoside; D047311:Luteolin; C040048:caffeic acid
keywords: flavonoid glycoside; phenolic acid; plant extract; yacon