Comparison of the antioxidant properties and flavonols in various parts of Korean red onions by multivariate data analysis

Mi Jin Park, Da Hye Ryu, Jwa Yeong Cho, In Jong Ha, Jin Seong Moon, Young Hwa Kang

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

To compare the antioxidant properties and flavonols in various parts; dry skin (DS) and edible portion (EP), of 8 red onions (Allium cepa L, ROs), total content of phenolics (TPC), flavonoids (TFC), and anthocyanins (TAC) and DPPH radical scavenging properties were estimated and the content of six flavonols were quantified by HPLC–PDA analysis. The major component of DS and EP of RO was quercetin and quercetin-4′-glucoside, respectively. Score plots of the PCA and PLS-DA were segregated by flavonols content and antioxidant properties according to the EP and DS of ROs. Loading plot of the PCA showed that the quercetin and sum of flavonol content were highly correlated with antioxidant activity of ROs. Therefore, flavonol content and antioxidant activity can be used as markers for distinct parts of ROs.

Original languageEnglish
Pages (from-to)919-927
Number of pages9
JournalHorticulture Environment and Biotechnology
Volume59
Issue number6
DOIs
StatePublished - 1 Dec 2018

Keywords

  • Antioxidants
  • Partial least squares discriminant analysis
  • Principal component analysis
  • Quercetine
  • Red Allium cepa L

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