Antioxidant properties of bran extracts from `Platte' wheat grown at different locations

• Published in: Food chemistry Vol. 90; no. 1-2; pp. 311 - 316
• Main Authors: Yu, Liangli, Zhou, Kequan
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.03.2005; Elsevier
• Subjects: ABTS[rad]; Antioxidant; antioxidant activity; antioxidants; Biological and medical sciences; cations; Cereal and baking product industries; Chelating; chelation; DPPH[rad]; environmental factors; food composition; Food industries; free radicals; Fundamental and applied biological sciences. Psychology; genotype-environment interaction; heat sums; iron; irrigated conditions; metal ions; optimization; Phenolic; phenolic compounds; plant breeding; plant growth; Radical scavenging; seed extracts; solar radiation; Triticum aestivum; Wheat; wheat bran; winter wheat; Colorado; Chelating; DPPH; Phenolic; Antioxidant; Wheat; Radical scavenging; ABTS; Cereal bran; Wheat; Radical scavenging; Antioxidant; Phenolic; Chelating; ABTS; Cereal product; Phenols; Cereal; Extract; Properties
• ISSN: 0308-8146; 1873-7072
• DOI: 10.1016/j.foodchem.2004.04.007

The effects of environmental factors including total solar radiation, average daily solar radiation, and number of hours exceeding 32 °C on the antioxidant properties and total phenolic contents (TPC) of Platte wheat were evaluated. Bran extracts of Platte wheat grown at one irrigated and four nonirrigated testing locations in Colorado were examined for their radical scavenging activities against ABTS+ and DPPH, Fe2+ chelating capacity, and TPC. Bran samples from Fort Collins, the irrigated location, had the greatest ABTS+ scavenging activity of 35.8 μmole trolox equivalent/g bran, and the strongest DPPH scavenging capacity. Differences in chelating activities and TPC were also detected among bran samples from individual growing locations. Total phenolic contents of Platte bran grown at five different locations were correlated with the number of hours exceeding 32 °C (r=−0.86, P=0.06). No correlation between solar radiations and any of the tested antioxidant properties was detected in this study. These data indicated the potential influence of growing conditions on the antioxidant properties and TPC of wheat. Furthermore, individual antioxidant property of a selected wheat genotype may respond to the environmental changes differently.