title: Influence of variety and harvest maturity on phytochemical content in corn silk.
abstract: Corn silk has been used as a traditional herb in Asia. The objective of this study was to evaluate variability in phytochemicals in corn varieties at three maturity stages of corn silk. Ten vegetable corn varieties were evaluated in a completely randomized design with three replications. Data were recorded for total phenolic (TPC), total flavonoids (TFC), total anthocyanin (TAC) and antioxidant activity (AA) by DPPH free-radical-scavenging assays. Differences among corn varieties were observed for all parameters at all maturity stages, and the interactions between maturity stage and corn variety were significant. TPC and TAC were highest at the milky stage, whereas TFC and AA were highest at the silking stage. TPC, TFC and AA were highest in super sweet corn and white corn at the silking stage. PWC5 variety of purple waxy corn at the milky stage had the highest values for all parameters, and it is useful for further development of functional food products.
authors.affiliation: Department of Plant Science and Agricultural Resources, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002, Thailand. Electronic address: i.eak_@hotmail.com.
authors.forename: Eakrin
authors.initials: E
authors.lastname: Sarepoua
authors.affiliation: Department of Food Technology, Faculty of Technology, Khon Kaen University, Khon Kaen 40002, Thailand. Electronic address: ratchada@kku.ac.th.
authors.forename: Ratchada
authors.initials: R
authors.lastname: Tangwongchai
authors.affiliation: Department of Plant Science and Agricultural Resources, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002, Thailand; Plant Breeding Research Center for Sustainable Agriculture, Faculty of Agriculture, KhonKaen University, Khon Kaen 40002, Thailand. Electronic address: sphala@kku.ac.th.
authors.forename: Bhalang
authors.initials: B
authors.lastname: Suriharn
authors.affiliation: Department of Plant Science and Agricultural Resources, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002, Thailand; Plant Breeding Research Center for Sustainable Agriculture, Faculty of Agriculture, KhonKaen University, Khon Kaen 40002, Thailand. Electronic address: kamol9@gmail.com.
authors.forename: Kamol
authors.initials: K
authors.lastname: Lertrat
mesh_terms: D000872:Anthocyanins / Q000032:analysis; D000975:Antioxidants / Q000494:pharmacology; D005419:Flavonoids / Q000032:analysis; D010636:Phenols / Q000032:analysis; D010936:Plant Extracts / Q000494:pharmacology; D003313:Zea mays / Q000737:chemistry* / Q000254:growth & development
chemical_list: D000872:Anthocyanins; D000975:Antioxidants; D005419:Flavonoids; D010636:Phenols; D010936:Plant Extracts
keywords: Anthocyanin; Flavonoid; Functional food; Phenolic compounds; Vegetable corn