Details

Autor(en) / Beteiligte

• Gunaratne, Anil
• Wu, Kao
• Li, Dongqin
• Bentota, Amitha
• Corke, Harold
• Cai, Yi-Zhong

Titel

Antioxidant activity and nutritional quality of traditional red-grained rice varieties containing proanthocyanidins

Ist Teil von

• Food chemistry, 2013-06, Vol.138 (2-3), p.1153-1161

Ort / Verlag

Kidlington: Elsevier Ltd

Erscheinungsjahr

2013

Quelle

Elsevier ScienceDirect Journals

Beschreibungen/Notizen

• ► We tested antioxidants and nutrients of eight traditional red-grained rice varieties. ► Red rice varieties showed superior antioxidant capacity and nutritional quality. ► Proanthocyanidins were identified as dominant antioxidants in red rice varieties. ► High levels of protein, amino acids and vitamin E were detected in red varieties. ► Proanthocyanidin-containing varieties are used as potential source of antioxidants. 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.