title: Antioxidant activity and nutritional quality of traditional red-grained rice varieties containing proanthocyanidins.
abstract: Proanthocyanidin-containing rice varieties have been rarely reported. Antioxidant capacity, major antioxidant components, and nutritional parameters of eight traditional red-grained rice varieties containing proanthocyanidins grown in Sri Lanka were investigated. The tested traditional red varieties, on the average, had over sevenfold higher both total antioxidant capacity and phenolic content than three light brown-grained new-improved rice varieties. Major antioxidant phenolic compounds identified in this study included proanthocyanidins, phenolic acids and γ-oryzanols (ferulic acid derivatives). Proanthocyanidins were detected only in the traditional red varieties, but not found in new-improved ones. Most traditional red varieties also contained significantly higher levels of protein with well balanced amino acids and higher contents of fat, fibre and vitamin E (tocopherols and tocotrienols) than the new-improved ones. Great variations in antioxidant capacity, major phenolics, and nutritional parameters were observed among different rice varieties. These Sri Lankan traditional red-grained rice varieties containing proanthocyanidins may be used as important genetic sources for rice breeding.
authors: Sabaragamuwa University of Sri Lanka, P.O. Box 02, Belihuloya, Sri Lanka.
authors: Anil
authors: A
authors: Gunaratne
authors: Kao
authors: K
authors: Wu
authors: Dongqin
authors: D
authors: Li
authors: Amitha
authors: A
authors: Bentota
authors: Harold
authors: H
authors: Corke
authors: Yi-Zhong
authors: YZ
authors: Cai
mesh_terms: D000596:Amino Acids / Q000032:analysis; D000975:Antioxidants / Q000032:analysis*; D004043:Dietary Fiber / Q000032:analysis; D009753:Nutritive Value; D012275:Oryza / Q000737:chemistry* / Q000145:classification; D010636:Phenols / Q000032:analysis; D010940:Plant Proteins / Q000032:analysis; D044945:Proanthocyanidins / Q000032:analysis*; D013188:Sri Lanka; D014810:Vitamin E / Q000032:analysis
chemical_list: D000596:Amino Acids; D000975:Antioxidants; D004043:Dietary Fiber; D010636:Phenols; D010940:Plant Proteins; D044945:Proanthocyanidins; D014810:Vitamin E