title: Change in chemical constituents and free radical-scavenging activity during Pear (Pyrus pyrifolia) cultivar fruit development.
abstract: Changes in chemical constituent contents and DPPH radical-scavenging activity in fruits of pear (Pyrus pyrifolia) cultivars during the development were investigated. The fruits of seven cultivars (cv. Niitaka, Chuhwangbae, Wonhwang, Hwangkeumbae, Hwasan, Manpungbae, and Imamuraaki) were collected at 15-day intervals after day 20 of florescence. Vitamins (ascorbic acid and α-tocopherol), arbutin, chlorogenic acid, malaxinic acid, total caffeic acid, total flavonoids, and total phenolics were the highest in immature pear fruit on day 20 after florescence among samples at different growth stages. All of these compounds decreased gradually in the fruit during the development. Immature pear fruit on day 35 or 50 after florescence exhibited higher free radical-scavenging activity than that at other times, although activities were slightly different among cultivars. The chemical constituent contents and free radical-scavenging activity were largely different among immature fruits of the pear cultivars, but small differences were observed when they matured.
authors.affiliation: a Department of Food Science & Technology, and Functional Food Research Center , Chonnam National University , Gwangju , Republic of Korea.
authors.forename: Jeong-Yong
authors.initials: JY
authors.lastname: Cho
authors.forename: Sang-Hyun
authors.initials: SH
authors.lastname: Lee
authors.forename: Eun Hee
authors.initials: EH
authors.lastname: Kim
authors.forename: Hae Rim
authors.initials: HR
authors.lastname: Yun
authors.forename: Hang Yeon
authors.initials: HY
authors.lastname: Jeong
authors.forename: Yu Geon
authors.initials: YG
authors.lastname: Lee
authors.forename: Wol-Soo
authors.initials: WS
authors.lastname: Kim
authors.forename: Jae-Hak
authors.initials: JH
authors.lastname: Moon
mesh_terms: D001713:Biphenyl Compounds / Q000737:chemistry; D016166:Free Radical Scavengers / Q000737:chemistry* / Q000494:pharmacology*; D005638:Fruit / Q000254:growth & development*; D010851:Picrates / Q000737:chemistry; D031989:Pyrus / Q000737:chemistry* / Q000254:growth & development*
chemical_list: D001713:Biphenyl Compounds; D016166:Free Radical Scavengers; D010851:Picrates; C004931:1,1-diphenyl-2-picrylhydrazyl
keywords: Pyrus pyrifolia; free radical-scavenging activity; immature fruits; pear; phenolics