Effect of Brown Pericarp and Seed Coat Gene Rc on Antioxidant Properties in Brown Rice

Abstract

In order to identify the effect of the brown pericarp and seed coat gene (colored gene), Rc on the antioxidant properties in brown rice, we examined T65Rc and its parental lines, P.T.B.10 and Taichung 65, using an isogenic line of the colored gene Rc. In the XYZ reaction oxygen scavenging emission system, the scavenging activity of hydrogen peroxide in the red rice varieties was 9 times as high as that of the rice variety Koshihikari (control). However, no significant differences in the antioxidant properties both in brown rice and germinated brown rice were observed between T65Rc and Taichung 65. The same results were obtained when the DPPH radical scavenging activity method was used. These results suggested that red rice exhibited a higher antioxidant activity than white colored rice, although the antioxidant activity of red rice was not affected by the colored gene Rc.