title: Correlation between changes in polyphenol composition of peels and incidence of CO₂ skin burning of 'Cameo' apples as influenced by controlled atmosphere storage.
abstract: 'Cameo' apples stored under high CO₂ levels suffer from "skin burning". Accordingly, this study is aimed to correlate the incidence of skin burning with different polyphenols. After harvest, apples were sorted into bad- and good-colored fruit and further stored under either high (3%) or low (0.7%) CO₂ level. At frequent intervals, fruit were assessed for incidence of skin burning and relative concentrations of various polyphenols. Results clearly show that bad-colored apples stored under high CO₂ level had the highest incidence percentage. Concerning the polyphenol profile, good-colored and healthy apples had significantly higher concentrations of certain polyphenols, including cyanidin-3-galactoside and rutin. However, bad-colored and injured apples had significantly higher concentrations of another set of polyphenols, including phloridzin, epicatechin, and (epi)catechin→(epi)catechin isomers. Taking into account that quercetins and cyanidins account for more than 80% of antioxidants, it is logical to assume that these polyphenols might give protection to good-colored apples against skin burning.
authors.affiliation: Department of Biology and Biochemistry, Birzeit University, Birzeit, Palestine. jharb@birzeit.edu
authors.forename: Jamil
authors.initials: J
authors.lastname: Harb
authors.forename: Dominikus
authors.initials: D
authors.lastname: Kittemann
authors.forename: Daniel Alexandre
authors.initials: DA
authors.lastname: Neuwald
authors.forename: Thomas
authors.initials: T
authors.lastname: Hoffmann
authors.forename: Wilfried
authors.initials: W
authors.lastname: Schwab
mesh_terms: D000872:Anthocyanins / Q000032:analysis / Q000378:metabolism; D002245:Carbon Dioxide / Q000009:adverse effects*; D005419:Flavonoids / Q000032:analysis* / Q000378:metabolism; D005519:Food Preservation; D063427:Food Quality; D061353:Food Storage; D005638:Fruit / Q000737:chemistry* / Q000254:growth & development / Q000378:metabolism; D005697:Galactosides / Q000032:analysis / Q000378:metabolism; D005858:Germany; D027845:Malus / Q000737:chemistry* / Q000254:growth & development / Q000378:metabolism; D010860:Pigments, Biological / Q000032:analysis / Q000378:metabolism; D059808:Polyphenols / Q000032:analysis / Q000378:metabolism; D011794:Quercetin / Q000032:analysis / Q000378:metabolism; D012431:Rutin / Q000032:analysis / Q000378:metabolism; D013499:Surface Properties
chemical_list: D000872:Anthocyanins; D005419:Flavonoids; D005697:Galactosides; D010860:Pigments, Biological; D059808:Polyphenols; D002245:Carbon Dioxide; D012431:Rutin; C017154:cyanidin; D011794:Quercetin; C546035:cyanidin 3-galactoside