title: Antioxidant activity in extracts of 27 indigenous Taiwanese vegetables.
abstract: The objectives of this study were to identify the antioxidants and antioxidant axtivity in 27 of Taiwan's indigenous vegetables. Lycium chinense (Lc), Lactuca indica (Li), and Perilla ocymoides (Po) contained abundant quercetin (Que), while Artemisia lactiflora (Al) and Gynura bicolor (Gb) were rich in morin and kaempferol, respectively. Additionally, Nymphoides cristata (Nc) and Sechium edule (Se)-yellow had significantly higher levels of myricetin (Myr) than other tested samples. Cyanidin (Cyan) and malvidin (Mal) were abundant in Gb, Abelmoschus esculentus Moench (Abe), Po, Anisogonium esculentum (Retz.) Presl (Ane), Ipomoea batatas (Ib)-purple, and Hemerocallis fulva (Hf)-bright orange. Relatively high levels of Trolox equivalent antioxidant capacity (TEAC), oxygen radical absorption capacity (ORAC), and 1,1-diphenyl-2-picryl-hydrazyl (DPPH) radical scavenger were generated from extracts of Toona sinensis (Ts) and Po. Significant and positive correlations between antioxidant activity and polyphenols, anthocyanidins, Que, Myr, and morin were observed, indicating that these phytochemicals were some of the main components responsible for the antioxidant activity of tested plants. The much higher antioxidant activity of Po, Ts, and Ib (purple leaf) may be related to their higher Cyan, Que, and polyphenol content.
authors.affiliation: Department of Nutrition and Health Sciences, Chinese Culture University, Taipei 11114, Taiwan. pychao@faculty.pccu.edu.tw.
authors.forename: Pi-Yu
authors.initials: PY
authors.lastname: Chao
authors.affiliation: Department of Applied Science of Living, Chinese Culture University, Taipei 11114, Taiwan. sui.karen@msa.hinet.net.
authors.forename: Su-Yi
authors.initials: SY
authors.lastname: Lin
authors.affiliation: Graduate Institute of Biotechnology, Chinese Culture University, Taipei 11114, Taiwan. rlin52714@yahoo.com.tw.
authors.forename: Kuan-Hung
authors.initials: KH
authors.lastname: Lin
authors.affiliation: Department of Applied Science of Living, Chinese Culture University, Taipei 11114, Taiwan. crrgel@dep.pccu.edu.tw.
authors.forename: Yu-Fen
authors.initials: YF
authors.lastname: Liu
authors.affiliation: Department of Nutrition and Health Sciences, Chinese Culture University, Taipei 11114, Taiwan. crfnhs@dep.pccu.edu.tw.
authors.forename: Ju-Ing
authors.initials: JI
authors.lastname: Hsu
authors.affiliation: Research Center for Biodiversity, Academia Sinica, Nankang, Taipei 11106, Taiwan. cmyang@gate.sinica.edu.tw.
authors.forename: Chi-Ming
authors.initials: CM
authors.lastname: Yang
authors.affiliation: Graduate Institute of Biotechnology, Chinese Culture University, Taipei 11114, Taiwan. theresapi@yahoo.com.tw.
authors.forename: Jun-You
authors.initials: JY
authors.lastname: Lai
mesh_terms: D000872:Anthocyanins / Q000032:analysis; D000975:Antioxidants / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid; D005419:Flavonoids / Q000032:analysis; D044949:Kaempferols / Q000032:analysis; D010936:Plant Extracts / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry; D059808:Polyphenols / Q000032:analysis; D017382:Reactive Oxygen Species; D013624:Taiwan; D014675:Vegetables / Q000737:chemistry*; D047309:Flavones
chemical_list: D000872:Anthocyanins; D000975:Antioxidants; D005419:Flavonoids; D044949:Kaempferols; D010936:Plant Extracts; D059808:Polyphenols; D017382:Reactive Oxygen Species; C006552:kaempferol; C040015:myricetin; C008548:morin; D047309:Flavones