Journal
FOOD RESEARCH INTERNATIONAL
Volume 65, Issue -, Pages 282-290Publisher
ELSEVIER
DOI: 10.1016/j.foodres.2014.03.007
Keywords
Oryza sativa L; Anthocyanins; Black rice; Flavan-3-ol; Pyrogallol; DPPH
Categories
Funding
- Regione Piemonte (Polo di Innovazione Agroalimentare), as a part of the RiOrTec innova project
- Fondo Social Europeo
- Junta de Comunidades de Castilla-La Mancha
Ask authors/readers for more resources
The three principal black rice varieties grown in Piedmont (Artemide, Venere, Nerone) have been studied in comparison with other three at different pigmentations: red (Ermes, Russ) and white, partially refined (Selenio). The extracts from these six different cultivars, processed as husked rices, were analyzed by high-performance liquid chromatography coupled with diode array detection and electrospray ionization-mass spectrometry (HPLC-DAD-ESI-MS/MS). Both qualitative and quantitative characterizations of the flavonoids (anthocyanins, flavonols, and flavan-3-ols) and non-flavonoid (hydroxycinnamic acids) phenolic compounds were achieved. 2,2-Diphenyl-1-picrylhydrazyl radical (DPPH center dot) scavenging activity and total phenolic content were evaluated to determine the antioxidant properties of different rices. Black rice showed higher contents of phenolics, flavonoids, and anthocyanins showing higher antioxidant activity when compared to white and partially if compared to red rices. Cyanidin-3-glucoside was the major anthocyanin in black rice grains, followed by peonidin-3-glucoside and cyanidin-3-rutinoside. With respect to the diglycosyl anthocyanins, cyanidin-3-O-gentiobioside was confirmed and quantified in black varieties. Significant differences in phytochemical content and antioxidant activity were achieved also among the three black varieties. The results demonstrate that the black rice varieties contain a rich heterogeneous mixture of phytochemicals which may provide a basis for the potential health benefits, and highlights the rice as a functional food. (C) 2014 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available