Structural elucidation of flavonoids from Shatianyu (Citrus grandis L. Osbeck) pulp and screening of key antioxidant components
文献类型： 外文期刊
作者： Deng, Mei 1 ; Jia, Xuchao 1 ; Dong, Lihong 1 ; Liu, Lei 1 ; Huang, Fei 1 ; Chi, Jianwei 1 ; Ma, Qin 1 ; Zhao, Dong 1 ; Zhang, Mingwei 1 ; Zhang, Ruifen 1 ;
作者机构： 1.Guangdong Acad Agr Sci, Sericultural & Agrifood Res Inst, Key Lab Funct Foods, Minist Agr,Guangdong Key Lab Agr Prod Proc, Guangzhou 510610, Peoples R China
2.Huazhong Agr Univ, Dept Food Sci & Technol, Wuhan 430070, Peoples R China
关键词： Citrus grandis L. Osbeck; Pummelo; Flavonoids; Online knockout; Antioxidant activity
期刊名称：FOOD CHEMISTRY （ 影响因子：9.231； 五年影响因子：8.795 ）
ISSN： 0308-8146
年卷期： 2022 年 366 卷
页码：
收录情况： SCI
摘要： The Citrus genus is a good source of dietary flavonoids, which have many health benefits. As a representative citrus fruit, the flavonoids composition in Shatianyu (Citrus grandis L. Osbeck) pulp remains to be investigated. In the present study, 11 flavonoids were isolated and identified from Shatianyu pulp flavonoid extracts (SPFEs). Among them, 4 flavonoids were previously undescribed and 2 flavonoids were firstly isolated from pummelo. The cellular antioxidant activity (CAA) and oxygen radical absorbance capacity (ORAC) of isolated compounds were evaluated. Naringin and rhoifolin showed the highest ORAC activity, and the presence of a 3-hydroxy-3-methylglutaryl or a 4'-glucose decreased the ORAC activity of flavonoids. The contribution of isolated flavonoids to the holistic antioxidant activity of SPFEs was determined by an online knockout method. Melitidin, bergamjuicin and naringin contributed most to ORAC activity, while bergamjuicin, melitidin and apigenin-4'-O-beta-D-glucopyranosyl-7-O-alpha-L-rhamnopyranosyl-(1 -> 2)-[6 ''-O-(3-hydroxy-3-methylgltaryl)]-beta-D-glucopyranoside contributed most to CAA activity.
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