title: Antioxidant activity and chemical constituents of edible flower of Sophora viciifolia.
abstract: The antioxidant activities of crude extract and its derived soluble fractions from the flower of Sophora viciifolia were evaluated in five different test systems (DPPH, ABTS, FRAP, reducing power and inhibition of lipid peroxidant models) for the first time. The ethylacetate soluble fraction exhibited the highest antioxidant effect. Correlation analysis suggested that the flavonoids might be the major contributors for the high antioxidant activity of this flower. In addition, 11 compounds were isolated from this flower, and the antioxidant capacities of 5 flavonoids were evaluated by DPPH assay. Compound 3 (luteolin) had a significant DPPH radical-scavenging activity, and was also present at the highest concentration (5.56mg/gdrysample), implying an important role of 3 for the antioxidant activity of this flower. The study suggests that the flower of S. viciifolia can provide valuable functional ingredients and can be used for the prevention of diseases related to various oxidant by-products of human metabolism.
authors.affiliation: Key Laboratory of Medicinal Chemistry for Nature Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, Yunnan, China.
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Tai
authors.affiliation: Key Laboratory of Medicinal Chemistry for Nature Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, Yunnan, China.
authors.forename: Le
authors.initials: L
authors.lastname: Cai
authors.affiliation: Department of Applied Mathematics, Kunming University of Science and Technology, Kunming 650093, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Dai
authors.affiliation: Key Laboratory of Medicinal Chemistry for Nature Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, Yunnan, China.
authors.forename: Liuhong
authors.initials: L
authors.lastname: Dong
authors.affiliation: Technology Center, Hongyun-Honghe Tobacco (Group) Co. Ltd., Kunming 650202, China.
authors.forename: Mingfeng
authors.initials: M
authors.lastname: Wang
authors.affiliation: Key Laboratory of Medicinal Chemistry for Nature Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, Yunnan, China.
authors.forename: Yabin
authors.initials: Y
authors.lastname: Yang
authors.affiliation: Key Laboratory of Medicinal Chemistry for Nature Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, Yunnan, China.
authors.forename: Qiue
authors.initials: Q
authors.lastname: Cao
authors.affiliation: Key Laboratory of Medicinal Chemistry for Nature Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, Yunnan, China. Electronic address: ztding@ynu.edu.cn.
authors.forename: Zhongtao
authors.initials: Z
authors.lastname: Ding
keywords: Antioxidant; Flavonoids; Sophora viciifolia