title: Variation of active constituents and antioxidant activity in pyrola [P. incarnata Fisch.] from different sites in Northeast China.
abstract: The variation of antioxidant activity and active components in pyrola [Passiflora incarnata Fisch.] from eight sites in Northeast China were investigated. Total phenolic and flavonoid contents were determined and varied within the range of 39.66-181.48 mg/g and 2.47-22.11 mg/g, respectively. Antioxidant activities were determined by scavenging activity against DPPH and ABTS, by a reducing power test and by a β-carotene-linoleic acid bleaching test. The IC50 of Tahe samples determined by the DPPH test was 0.106±0.006 mg/mL which was very close to that of Vc (0.076±0.004 mg/mL). The Tahe samples had good antioxidant activity. Principal component activity analysis indicated that the Tahe samples of P. incarnata had the highest potential antioxidant properties, and may be a valuable antioxidant natural resource in the northeast of China.
authors.affiliation: State Engineering Laboratory for Bio-Resource Eco-Utilization, Northeast Forestry University, Harbin 150040, PR China.
authors.forename: Dong-Yang
authors.initials: DY
authors.lastname: Zhang
authors.forename: Meng
authors.initials: M
authors.lastname: Luo
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.forename: Chun-Jian
authors.initials: CJ
authors.lastname: Zhao
authors.forename: Cheng-Bo
authors.initials: CB
authors.lastname: Gu
authors.forename: Yuan-Gang
authors.initials: YG
authors.lastname: Zu
authors.forename: Yu-Jie
authors.initials: YJ
authors.lastname: Fu
authors.forename: Xiao-Hui
authors.initials: XH
authors.lastname: Yao
authors.forename: Ming-Hui
authors.initials: MH
authors.lastname: Duan
mesh_terms: D000975:Antioxidants / Q000032:analysis*; D002681:China; D005419:Flavonoids / Q000032:analysis*; D005843:Geography; D029598:Passiflora / Q000737:chemistry* / Q000145:classification; D010636:Phenols / Q000032:analysis; D010936:Plant Extracts / Q000032:analysis*
chemical_list: D000975:Antioxidants; D005419:Flavonoids; D010636:Phenols; D010936:Plant Extracts
keywords: Antioxidant activity; HPLC; Principal component analysis; Pyrola; Total phenolic content