title: Assessment of flavonoids and volatile compounds in tea infusions of water lily flowers and their antioxidant activities.
abstract: Water lily, a member of the Nymphaeaceae family, can be made into tea on the basis of outstanding fragrance characteristics and health care functions. In this study, 16 flavonoids were identified and quantified in tea infusions prepared from the petals of 33 water lily cultivars using HPLC-DAD and HPLC-ESI-MS/MS. The infusions were analyzed with HS-SPME coupled with GC-MS; 29 volatile compounds were detected, of which nine were found to be scent components. The cultivars were clustered into three clusters characterized according to scent components. The 'Conqueror' and 'Virginia' cultivars had the highest antioxidant activities. The concentrations of polyphenols and flavonoids showed significant positive correlations with antioxidant activity as measured by DPPH, ABTS(+), and FRAP assays. This study is valuable for a fuller understanding of this important tea and can also be used for the development of water lily.
authors.affiliation: Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China; University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Dan-Dan
authors.initials: DD
authors.lastname: Yin
authors.affiliation: Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China; College of Horticulture, Nanjing Agriculture University, Nanjing 210095, China.
authors.forename: Ru-Yu
authors.initials: RY
authors.lastname: Yuan
authors.affiliation: Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China; College of Horticulture, Nanjing Agriculture University, Nanjing 210095, China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Wu
authors.affiliation: Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China; University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Shan-Shan
authors.initials: SS
authors.lastname: Li
authors.affiliation: Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China; College of Horticulture, Nanjing Agriculture University, Nanjing 210095, China.
authors.forename: Shuai
authors.initials: S
authors.lastname: Shao
authors.affiliation: Department of Applied Chemistry, China Agricultural University, Beijing 100094, China.
authors.forename: Yan-Jun
authors.initials: YJ
authors.lastname: Xu
authors.affiliation: Department of Applied Chemistry, China Agricultural University, Beijing 100094, China.
authors.forename: Xiang-Hong
authors.initials: XH
authors.lastname: Hao
authors.affiliation: Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China. Electronic address: wanglsh@ibcas.ac.cn.
authors.forename: Liang-Sheng
authors.initials: LS
authors.lastname: Wang
mesh_terms: D000975:Antioxidants / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid; D005419:Flavonoids / Q000032:analysis*; D035264:Flowers / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry; D030721:Nymphaea / Q000737:chemistry*; D059808:Polyphenols / Q000032:analysis; D053719:Tandem Mass Spectrometry; D000069459:Teas, Herbal / Q000032:analysis*; D055549:Volatile Organic Compounds / Q000032:analysis*
chemical_list: D000975:Antioxidants; D005419:Flavonoids; D059808:Polyphenols; D000069459:Teas, Herbal; D055549:Volatile Organic Compounds
keywords: Antioxidant activity; Flavonoids; Tea infusion; Volatile compounds; Water lily