title: Polyphenolic composition, antioxidant activity, and polyphenol oxidase (PPO) activity of quince (Cydonia oblonga Miller) varieties.
abstract: Phytochemical profiles (phenolic compounds, L-ascorbic acid, antioxidant and PPO activities) of 13 different quince varieties and 5 genotypes were studied. Polyphenols were identified by LC-PDA-QTof/MS and quantified by UPLC-PDA and UPLC-FL. A total of 26 polyphenolic compounds found in quince tissues were identified and presented: 9 flavan-3-ols ((-)-epicatechin, procyanidin B2, 3 procyanidin dimers and trimers, and 1 tetramer); 8 hydroxycinnamates, derivatives of caffeoylquinic and coumaroylquinic acid; and 9 kaempferol and quercetin derivatives. The content of total polyphenols was between 1709.43 (genotype 'S1') and 3436.56 mg/100 g dry weight ('Leskovač'). Flavan-3-ols, which are the major class of quince polyphenols, represented between 78 and 94% of the total polyphenolic compounds. The activity of PPO enzyme ranged from 709.85 to 1284.59 ΔU/min, and that of L-ascorbic acid ranged from 5.86 to 26.42 mg/100 g. Some quince varieties and their products characterized by a higher content of phenolic compounds may be selected to promote their positive effect on health.
authors: Department of Fruit and Vegetable Processing, Wroclaw University of Environmental and Life Science , 37/41 Chełmońskiego Street, 51-630 Wroclaw, Poland.
authors: Aneta
authors: A
authors: Wojdyło
authors: Jan
authors: J
authors: Oszmiański
authors: Paweł
authors: P
authors: Bielicki
mesh_terms: D000975:Antioxidants / Q000737:chemistry*; D004156:Catechol Oxidase / Q000032:analysis*; D005638:Fruit / Q000737:chemistry / Q000201:enzymology; D005838:Genotype; D010936:Plant Extracts / Q000737:chemistry*; D010940:Plant Proteins / Q000032:analysis*; D059808:Polyphenols / Q000737:chemistry*; D027824:Rosaceae / Q000737:chemistry* / Q000145:classification / Q000201:enzymology / Q000235:genetics
chemical_list: D000975:Antioxidants; D010936:Plant Extracts; D010940:Plant Proteins; D059808:Polyphenols; D004156:Catechol Oxidase