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Comparison and Characterization of the Antioxidant Potential of 3 Wild Grapes― Vitis thunbergii , V. flexuosa , and V. kelungeusis
Author(s) -
Tung YuTang,
Cheng KaiChung,
Ho ShangTse,
Chen YongLong,
Wu TungLin,
Hung KeChang,
Wu JyhHorng
Publication year - 2011
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1750-3841.2011.02178.x
Subject(s) - antioxidant , chemistry , lignan , food science , botany , ferrous , biochemistry , biology , organic chemistry
This study considers a laboratory examination of the antioxidant performance of methanolic extracts from the leaves and stems of 3 common wild grapes ( Vitis thunbergii , V. flexuosa , and V. kelungeusis ) by various in vitro methods. It also seeks to identify the specific antioxidant constituent. Results revealed that, of these specimens, stem extracts of V. thunbergii exhibited good 1,1‐diphenyl‐2‐picrylhydrazyl radical‐scavenging and superoxide radical‐scavenging performance and ferrous ion‐chelating ability, as well as the highest total phenolic content (179.5 mg of GAE/g). The principal antioxidant, (+)‐lyoniresinol‐2a‐ O ‐β‐ d ‐glucopyranoside, was isolated from the stem extracts of V. thunbergii and identified. Removal of this compound from the extracts caused an approximate 2‐ to 5‐fold decrease in antioxidant performance. This showed that (+)‐lyoniresinol‐2a‐ O ‐β‐ d ‐glucopyranoside is the primary antioxidant in wild grapes. Results also indicated that the antioxidant performance of (+)‐lyoniresinol‐2a‐ O ‐β‐ d ‐glucopyranoside was stronger than its lignan aglycone, (+)‐lyoniresinol. Practical Application: Of the 3 common wild grapes― Vitis thunbergii , V. flexuosa , and V. kelungeusis , the extracts or phytochemicals, derived from the V. thunbergii stems have excellent antioxidant properties, so they have great potential as a basis for natural health products that seek to prevent diseases caused by the overproduction of radicals.