Effect of extensive feeding on α-tocopherol concentration and oxidative stability of muscle microsomes from Iberian pigs

被引:66
作者
Rey, AI [1 ]
Lopez-Bote, CJ [1 ]
Arias, RS [1 ]
机构
[1] Univ Complutense, Fac Vet, Dept Anim Prod, E-28040 Madrid, Spain
来源
ANIMAL SCIENCE | 1997年 / 65卷
关键词
extensive husbandry; microsomes; oxidation; pigs; alpha-tocopherol;
D O I
10.1017/S1357729800008729
中图分类号
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号
0905 ;
摘要
The effect of extensive feeding, confinement and diet supplementation with alpha-tocopheryl acetate (100 mg/kg) on the fatty acid composition and tocopherol concentration of microsome extracts and their susceptibility to oxidation was studied in Iberian pigs. The diet of pigs raised extensively teas mostly composed of acorn and grass. The alpha-tocopherol contents of acorn and grass were 20 and 171 mg/kg dry matter, respectively Microsomal fatty acid composition showed no differences among groups. Pigs feeding extensively had a higher concentration of cw tocopherol in muscle and microsomes than pigs given mixed diet with the basal level of alpha-tocopheryl acetate (P<0.05) but lower values than pigs given supplementary levels (100 mg/kg) (P<0.05). Microsomal fractions from pigs given mixed diet with a basal level of alpha-tocopheryl acetate were significantly more susceptible to iron induced lipid oxidation than extract from pigs given diets containing a supplementary level (P<0.05). Microsomal extracts from pigs feeding extensively had the lowest oxidation late (P<0.05), suggesting that other dietary constituents may play a role in the stabilization of microsomal lipids.
引用
收藏
页码:515 / 520
页数:6
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