Effect of scale color on the antioxidant capacity of onions

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dc.authoridGOKCE, ALI FUAT/0000-0002-2953-0326
dc.contributor.authorGokce, Ali Fuat
dc.contributor.authorKaya, Cemal
dc.contributor.authorSerce, Sedat
dc.contributor.authorOzgen, Mustafa
dc.date.accessioned2024-09-18T19:52:37Z
dc.date.available2024-09-18T19:52:37Z
dc.date.issued2010
dc.departmentHatay Mustafa Kemal Üniversitesien_US
dc.description.abstractThe bulb onion (Allium cepa L.) has been cultivated for thousands of years and used as an important component of human diet. Recent studies suggest that onions can be used to cure, reduce, or prevent some of the health problems such as cancer, cardiovascular diseases, antidiabetic, asthma, antibiosis, and prebiotic effects due to its high antioxidant effect. In this Study, we determined the antioxidant capacities of a wide range of onion cultivars: nine commercial cultivars and five advance selections differing in color. The variables tested include bulb size, scale color,, total phenolic (TP), total antioxidant activity determined by both Ferric reducing ability of plasma (FRAP) and Trolox equivalent antioxidant capacity (TEAC). We found that yellow onion had the greatest TP content (3.7 mg GAE/g dw); and, the red group had higher TP mean than the white group (2.2 mg GAE/g dw vs. 1.1 mg GAE/g dw). For the antioxidant capacity measurements, the red group had the greatest means by both methods (15.4 mu mol TE/g dw and 9.3 mu mol TE/g dw for TEAC and FRAP). Yellow onions had higher TEAC (14.7 mu mol TE/g dw vs. 8.7 mu mol TE/g dw) and FRAP values (9.8 mu mol TE/g dw vs. 5.6 mu mol TE/g dw) than white onions. Among the cultivars tested great differences of TP, TEAC and FRAP was observed. The TP content of Me-Tan 88 (8.3 mg GAE/g dw) was two times higher than the yellow group. Yellow color Dayton had the greatest TEAC (20.5 mu mol TE/g dw) and FRAP (123 mu mol TE/g dw) means followed by yellow color Me-Tan 88 (19.4 and 11.4 mu mol TE/g dw). The two antioxidant measurements were found to be highly correlated (0.99) where absolute values of FRAP were about 40% less than those of TEAC. The values of TEAC and FRAP were significantly correlated by TP with similar rs (0.74 and 0.73, respectively). TP, TEAC and FRAP were significantly and positively correlated to Soluble solids (0.41, 0.43, and 0.40, respectively). Our results suggested that the red onions had higher antioxidant activities than yellow and white onions although yellow onions had the richest phenolic contents. (C) 2009 Elsevier B.V. All rights reserved.en_US
dc.identifier.doi10.1016/j.scienta.2009.11.007
dc.identifier.endpage435en_US
dc.identifier.issn0304-4238
dc.identifier.issue4en_US
dc.identifier.scopus2-s2.0-73749086117en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage431en_US
dc.identifier.urihttps://doi.org/10.1016/j.scienta.2009.11.007
dc.identifier.urihttps://hdl.handle.net/20.500.12483/7553
dc.identifier.volume123en_US
dc.identifier.wosWOS:000274947200001en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Science Bven_US
dc.relation.ispartofScientia Horticulturaeen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectAllium cepaen_US
dc.subjectFRAPen_US
dc.subjectPhenolicen_US
dc.subjectRed onionen_US
dc.subjectScale coloren_US
dc.subjectTEACen_US
dc.subjectWhite onionen_US
dc.subjectYellow onionen_US
dc.titleEffect of scale color on the antioxidant capacity of onionsen_US
dc.typeArticleen_US

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