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Nutrients 2011, 3(4), 505-514; doi:10.3390/nu3040505
Article

Variation in Fatty Acid Distribution of Different Acyl Lipids in Rice (Oryza sativa L.) Brans

1,2,* , 1
,
1
,
3
,
1
 and
1,2
1 Department of Nutritional Science, Kobe Gakuin University, Kobe, Hyogo 651-2180, Japan 2 Cooperative Research Center of Life Sciences, Kobe Gakuin University, Kobe, Hyogo 650-8586, Japan 3 Department of Biomedical Sciences, College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
* Author to whom correspondence should be addressed.
Received: 8 March 2011 / Revised: 5 April 2011 / Accepted: 18 April 2011 / Published: 21 April 2011
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Abstract

The lipids extracted from rice brans were classified by thin-layer chromatography into eight fractions, and their fatty acid (FA) compositions were investigated among five different Japanese cultivars. The lipids of these rice brans comprised mainly triacylglycerols (TAG; 84.9–86.0 wt%), free FA (4.2–4.6 wt%), and phospholipids (PL; 6.5–6.7 wt%), whilst other components were also detected in minor proportions (0.2–2.1 wt%). The PL components included phosphatidyl choline (43.3–46.8 wt%) phosphatidyl ethanolamine (25.0–27.3 wt%) and phosphatidyl inositol (20.2–23.2 wt%). Comparison of the different cultivars showed, with a few exceptions, no substantial difference (P > 0.05) in FA distribution. FA distribution of TAG among the five cultivars was characterized as: unsaturated FA predominantly concentrated at the sn-2 position and saturated FA primarily occupying the sn-1 or sn-3 position in these lipids. These results suggest that the rice bran lipids may be well incorporated into our daily diet to improve nutritional value of the Japanese diet.
Keywords: different acyl lipids; fatty acid distributions; phospholipids; rice bran lipids; triacylglycerols different acyl lipids; fatty acid distributions; phospholipids; rice bran lipids; triacylglycerols
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Yoshida, H.; Tanigawa, T.; Kuriyama, I.; Yoshida, N.; Tomiyama, Y.; Mizushina, Y. Variation in Fatty Acid Distribution of Different Acyl Lipids in Rice (Oryza sativa L.) Brans. Nutrients 2011, 3, 505-514.

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