作物学报2012，Vol.38Issue(1)：55-61,7.DOI:10.3724/SP.J.1006.2012.00055
水稻籽粒维生素E及组分在品种间的变异与分布
Variation and Distribution of Vitamin E and Composition in Seeds among Rice Varieties
摘要
Abstract
Vitamin E, including of tocotrienols and tocopherols, is one of miner nutrients that must be acquired regularly from dietary sources. The structure of tocotrienols differs from that of tocopherols by the presence of three trans-double bonds in the hydrocarbon chain. In this study, a reverse-phase HPLC method was used to simultaneously measure the contents of either tocopherols or tocotrienols in the brown rice, and their contents were compared among 18 indica and 16 japonica cultivars. The results showed that the contents of these vitamin E isomers were extremely different between indica and japonica rice, and the mean content of total tocopherol or vitamin E was significantly higher (P<0.01) in japonica rice than in indica rice, while the total to-cotrienol content showed no differences between them. The principal isomer of vitamin E was also different between the two subspecies. For example, γ-tocotrienol was the predominant compound in indica rice, on the contrary, in japonica rice, the most abundant isomer was a-tocopherol. The ratio of total tocotrienols to tocopherols was also significantly higher (P<0.01) in indica (1.61) than in japonica rice (0.95). Pearson's correlation analysis demonstrated that a-tocopherol content was positively correlated with a-tocotrienol content in rice. The same relationship was also presented between the contents of γ-tocopherol and γ-tocotrienol, but there was a negative correlation between contents of a- and y-isomers. These results provide useful information for research on vitamin E metabolism or nutritional improvement in rice.关键词
水稻/维生素E/生育酚/三烯生育酚/高效液相色谱Key words
Oryza sativa L./ Vitamin E/ Tocopherol/ Tocotrienol/ HPLC引用本文复制引用
张桂云,刘如如,张鹏,徐勇,朱姜,顾铭洪,梁国华,刘巧泉..水稻籽粒维生素E及组分在品种间的变异与分布[J].作物学报,2012,38(1):55-61,7.基金项目
本研究由国家重点基础研究发展计划(973计划)项目(2012CB944803)和国家自然科学基金项目(31071383)资助. （973计划）
