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

Nutrients

Hiromi Yoshida¹  Takaaki Tanigawa¹  Isoko Kuriyama¹  Naoko Yoshida²  Yuka Tomiyama¹ 

[1] Department of Nutritional Science, Kobe Gakuin University, Kobe, Hyogo 651-2180, Japan;Department of Biomedical Sciences, College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan;

关键词: different acyl lipids;    fatty acid distributions;    phospholipids;    rice bran lipids;    triacylglycerols;   

DOI  :  10.3390/nu3040505

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.