title: Variation in fatty acid distribution of different acyl lipids in rice (Oryza sativa L.) brans.
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.
authors.affiliation: Department of Nutritional Science, Kobe Gakuin University, Kobe, Hyogo, Japan. yoshida@nutr.kobegakuin.ac.jp
authors.forename: Hiromi
authors.initials: H
authors.lastname: Yoshida
authors.forename: Takaaki
authors.initials: T
authors.lastname: Tanigawa
authors.forename: Isoko
authors.initials: I
authors.lastname: Kuriyama
authors.forename: Naoko
authors.initials: N
authors.lastname: Yoshida
authors.forename: Yuka
authors.initials: Y
authors.lastname: Tomiyama
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Mizushina
mesh_terms: D002855:Chromatography, Thin Layer; D005227:Fatty Acids / Q000032:analysis*; D005230:Fatty Acids, Nonesterified / Q000032:analysis; D006868:Hydrolysis; D007564:Japan; D008055:Lipids / Q000032:analysis*; D012275:Oryza / Q000737:chemistry*; D010743:Phospholipids / Q000032:analysis; D012639:Seeds / Q000737:chemistry*; D013045:Species Specificity; D014280:Triglycerides / Q000032:analysis
chemical_list: D005227:Fatty Acids; D005230:Fatty Acids, Nonesterified; D008055:Lipids; D010743:Phospholipids; D014280:Triglycerides