title: Antioxidant properties of bran extracts from "Akron" wheat grown at different locations.
abstract: Bran extracts of Akron wheat grown at four nonirrigated and one irrigated testing locations were examined and compared for their free radical scavenging properties against the 2,2-diphenyl-1-picrylhydrazyl radical (DPPH(*)) and the radical cation ABTS(*)(+), chelating capacities, and total phenolic content (TPC) to determine the potential effects of environmental factors on the antioxidant properties of hard winter wheat. The environmental factors included total solar radiation, average daily solar radiation, and number of hours exceeding 32 degrees C. The results showed that bran samples from different growing locations may significantly differ in their radical scavenging activities against both DPPH(*) and ABTS(*)(+), chelating capacities, and TPC. A significant negative correlation was detected between the chelating activities of the bran samples from the four nonirrigated locations and total solar or daily average solar radiation (r = -0.999 and P = 0.001). These data suggest potential influences of growing conditions on the antioxidant properties of hard winter wheat and the possibility of producing wheat that is strong in a selected antioxidant property by optimizing the growing conditions of a selected wheat variety. More research is required to further investigate the relationship among antioxidant properties and environmental factors using different wheat varieties and larger sample sizes.
authors.affiliation: Department of Food Science and Human Nutrition and Department of Soil and Crop Sciences, Colorado State University, Fort Collins 80523, USA. yu@cahs.colostate.edu
authors.forename: Liangli
authors.initials: L
authors.lastname: Yu
authors.forename: Jonathan
authors.initials: J
authors.lastname: Perret
authors.forename: Mary
authors.initials: M
authors.lastname: Harris
authors.forename: John
authors.initials: J
authors.lastname: Wilson
authors.forename: Scott
authors.initials: S
authors.lastname: Haley
mesh_terms: D000531:Altitude; D000975:Antioxidants / Q000302:isolation & purification / Q000494:pharmacology*; D001713:Biphenyl Compounds; D002412:Cations; D004043:Dietary Fiber / Q000032:analysis*; D004777:Environment; D016166:Free Radical Scavengers / Q000737:chemistry; D010636:Phenols / Q000032:analysis; D010851:Picrates / Q000737:chemistry; D010936:Plant Extracts / Q000032:analysis; D013472:Sunlight; D014908:Triticum / Q000737:chemistry / Q000254:growth & development*
chemical_list: D000975:Antioxidants; D001713:Biphenyl Compounds; D002412:Cations; D004043:Dietary Fiber; D016166:Free Radical Scavengers; D010636:Phenols; D010851:Picrates; D010936:Plant Extracts; C004931:1,1-diphenyl-2-picrylhydrazyl