Comparison of the phenolic profiles of soaked and germinated peanut cultivars via UPLC-QTOF-MS

Qiong Qiong Yang, Lin Cheng, Zhi Yuan Long, Hua Bin Li, Anil Gunaratne, Ren You Gan*, Harold Corke

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Diverse peanut varieties are widely cultivated in China. However, few studies have investigated the effects of germination on the phenolic profiles and antioxidant activities of specific Chinese peanut cultivars. Therefore, this study was conducted to evaluate the effects of germination on total phenolic content (TPC), total flavonoid content (TFC), antioxidant activity, and phenolic profiles of seven peanut cultivars in China. The TPC, TFC, and antioxidant activities were determined by spectrophotometry, while phenolic profiles were analyzed by using ultra-high performance liquid chromatography coupled with quadrupole/time-of-flight mass spectrometry (UPLC-QTOF-MS). The results found that germination significantly increased TPC, TFC, and antioxidant activity. Antioxidant activity was found to be closely related to TPC in germinated peanut extracts, which indicates that phenolics are the main contributors of antioxidants in germinated peanuts. In addition, germination induced significant changes in polyphenolic profiles. In the analyzed samples, 36 phenolic compounds were identified in which most were flavonoids. Overall, these findings highlight that germinated peanuts can be a good natural source of natural antioxidants for human consumption and functional food development.

Original languageEnglish
Article number47
JournalAntioxidants
Volume8
Issue number2
DOIs
StatePublished - Feb 2019
Externally publishedYes

Keywords

  • Flavonoids
  • Germination
  • Groundnut
  • Mass analysis
  • Polyphenols

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