Crude oil and oryzanolum content in rice bran among three kinds of color rice
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摘要: 选择有代表性的34种种皮颜色的34个水稻品种的糙米为试验材料,用甲酯化-气相色谱法测定米糠毛油的脂肪酸组成,用紫外分光光度计测定谷维素含量,比较这34个品种之间及不同季节种植时的同一品种的米糠营养品质差异与变化趋势.结果表明,黑米米糠毛油含量和亚油酸比率极显著高于白米和红米,而白米与红米之间无显著差异;3种色稻的不饱和脂肪酸比率差异不显著.黑米米糠的谷维素含量极显著高于白米米糠和红米米糠,而白米米糠和红米米糠之间无显著差异.在供试品种中,黑米品种崇阳糯的不饱和脂肪酸比率最高,白米品种JHZZ和黑米品种的谷维素含量较高,而且早、晚两季性状较稳定.同一品种在同一地点种植,晚季栽培时米糠毛油含量比早季栽培时高,但谷维素含量和亚油酸比率比早季栽培时低.Abstract: Thirty-four color rice varieties’ brown rice were selected to study the content of five kinds of fatty acids(FA)and oryzanolum in the rice bran crude oil. The difference of nutrient quality among three kinds of color rice varieties and the variant tendency was compared. The result showed that lipid content and linoleic acid(LA)proportion in the fatty acid of black rice bran were significantly higher than that of red rice bran, but there were no significant difference between white rice bran and red rice bran. No significant difference in the unsaturated fatty acid among three color rice bran, Oryzanolum content of black rice bran was significantly higher than that in red rice bran and white rice bran,and there were no significant differences in those of white rice bran and red rice bran. The Chongyangnuo variety had the highest unsaturated fatty acid proportion in rice bran. The oryzanolum content in the JHZZ variety(white rice)and black rice varieties were higher than those in the others, and the character in the early and the late season in Fuzhou was steady;when the same variety cultivated in the same locality, the content of lipid grown in the late season(from July to November)was higher than that in the early season(from March to July), and the content of the oryzanolum and linoleic acid proportion was lower than that in the early season.
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Key words:
- Color rice /
- Rice bran crude oil /
- Unsaturated fatty acid /
- Oryzanolum
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[1] 陈睿,宋光泉.米糠的综合利用[J].粮食与饲料工业,1999(2):33-36. [2] 傅翠真,常汝镇,徐文英.中国大豆资源脂肪氧化酶缺失类型研究[J].植物遗传资源科学,2000(3):1-5.
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