title: Evaluation of foliar phenols of 25 Mexican varieties of common bean (Phaseolus vulgaris L.) as antioxidants and varietal markers.
abstract: The antioxidant properties and the foliar phenol composition of 25 Mexican varieties of Phaseolus vulgaris L. (common bean) were evaluated. Phaseolus coccineus was analysed with comparative aims. The high performance liquid chromatography with photodiode array detection analysis revealed 27 phenolics in the leaves of P. vulgaris (13 quercetin-3-O-glycosides, 8 kaempferol-3-O-glycosides, 2 myricetin glycosides and 4 phenolic acids) and 5 in P. coccineus (2 kaempferol-3-O-glycoside, 2 apigenin-7-O-glycoside and 1 luteolin-7-O-glycoside). All extracts showed high levels of phenols and flavonoids (0.964-5.601 mg g⁻¹ dry tissue, and 0.287-1.418 mg g⁻¹ dry tissue, respectively) and relevant antioxidant properties, suggesting that the leaves of the varieties of P. vulgaris are a significant source of natural antioxidants. The foliar phenol profiles were species-specific and, besides, the qualitative variation allowed discriminating among varieties of P. vulgaris. These profiles can represent an important varietal authenticity proof.
authors: a Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional, Instituto Politécnico Nacional , 34220 Durango , Mexico.
authors: Alfonso
authors: A
authors: Reyes-Martínez
authors: Norma
authors: N
authors: Almaraz-Abarca
authors: Tzayhri
authors: T
authors: Gallardo-Velázquez
authors: María Del Socorro
authors: Mdel S
authors: González-Elizondo
authors: Yolanda
authors: Y
authors: Herrera-Arrieta
authors: Arnulfo
authors: A
authors: Pajarito-Ravelero
authors: Ruth Elizabeth
authors: RE
authors: Alanís-Bañuelos
authors: Martha Isabel
authors: MI
authors: Torres-Morán
mesh_terms: D000975:Antioxidants / Q000737:chemistry / Q000494:pharmacology*; D002851:Chromatography, High Pressure Liquid; D005419:Flavonoids / Q000737:chemistry / Q000494:pharmacology; D006027:Glycosides / Q000737:chemistry / Q000494:pharmacology; D062385:Hydroxybenzoates / Q000737:chemistry / Q000494:pharmacology; D008800:Mexico; D027805:Phaseolus / Q000737:chemistry* / Q000235:genetics*; D010636:Phenols / Q000032:analysis* / Q000737:chemistry / Q000494:pharmacology*; D018515:Plant Leaves / Q000737:chemistry
chemical_list: D000975:Antioxidants; D005419:Flavonoids; D006027:Glycosides; D062385:Hydroxybenzoates; D010636:Phenols; C040015:myricetin; C017616:phenolic acid
keywords: Phaseolus vulgaris; antioxidant capacity; chemical markers; foliar flavonoids; phenolic acids