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Genotypic Difference in Tocopherol and Tocotrienol Contents of Rice Bran  

박경열 (경기도농업기술원)
강창성 (경기도농업기술원)
조영철 (경기도농업기술원)
이용선 (경기도농업기술원)
이영현 (경기도농업기술원)
이영상 (순천향대학교 생명과학부)
Publication Information
KOREAN JOURNAL OF CROP SCIENCE / v.48, no.6, 2003 , pp. 469-472 More about this Journal
Abstract
The rice bran has been known to contain tocopherols and tocotrienols carrying antioxidant and cholesterol-lowing activities. The content of 8 isomers of vitamin E : $\alpha\textrm{-}$, $\beta\textrm{-}$, $\gamma\textrm{-}$, $\delta\textrm{-}$tocoperols (T) and tocotrienols ($\textrm{T}_3$) were extracted from 18 major rice varieties and quantified with an HPLC. Tested varieties exhibited T, $\textrm{T}_3$ and total vitamin E ($\textrm{TT}_3$) contents ranging 9.1-14.8, 22.4-37.1, 34.9-46.5 mg/100g with averages of 11.1, 28.0, 39.2 mg/100g, respectively. Among tested varieties, Seojinbyeo and Hwasungbyeo showed high T contents and Andabyeo, Damakum were high in $\textrm{T}_3$, and Andabyeo and Seojinbyeo were high in total $\textrm{TT}_3$ contents. Regardless of varieties, the average 8 isomer contents (in mg/100g) were in descending order of $\gamma\textrm{-}$$\textrm{T}_3$(17.9) >$\alpha\textrm{-}$$\textrm{T}_3$(8.8) >$\alpha\textrm{-}$T (7.8) >$\gamma\textrm{-}$T(2.6) >$\delta\textrm{-}$$\textrm{T}_3$ (0.9)>$\beta\textrm{-}$T (0.7)>$\beta\textrm{-}$$\textrm{T}_3$ (0.4)>$\delta\textrm{-}$T (0.1). In most varieties, $\gamma\textrm{-}$$\textrm{T}_3$, a strong antioxidant and anticancer compound, consisted 64% of total tocotrienol and 46% of total vitamin E in vice bran.
Keywords
rice bran; vitamin E; tocopherol; tocotrienol;
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