A developmental profile of tocol accumulation in oat seeds
A developmental profile of tocol accumulation in oat seeds
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DOI：
10.1016/j.jcs.2012.10.001
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发表时间：
2013-01-01
影响因子：
3.8
通讯作者：
Garvin, David F.
中科院分区：
文献类型：
--
作者：
Gutierrez-Gonzalez, Juan J.;Wise, Mitchell L.;Garvin, David F.
燕麦是许多维生素和矿物质的良好来源，其中包括共同构成维生素 E（母育酚）的化合物。母育酚由两个亚类组成：生育酚和生育三烯酚。由于其强大的抗氧化特性，燕麦中母育酚的健康益处受到关注。然而，人们对它们积累的发育方面知之甚少。此外，除了它们在保护细胞膜免受氧化损伤方面的作用外，它们在植物中可能的生理作用在很大程度上还没有被研究。在这项研究中，我们量化了燕麦种子发育过程中五个时间点的母育酚积累，并将整个种子中母育酚的浓度和成分与种子发育后期的胚乳和胚进行了比较。母育酚亚组积累的时间模式是不同的。生育三烯酚和生育酚在种子发育过程中稳步增加；然而，生育三烯酚的进展是S形的，生育酚是线性的。到种子发育结束时，生育三烯酚是整个种子和去除胚的种子中最丰富的母育酚。相比之下，在种子发育后期，胚胎含有比生育三烯酚浓度更高的生育酚。种子发育过程中时间和空间分布的差异表明生育三烯酚和生育酚的不同作用。由爱思唯尔有限公司出版
Oats are a good source of many vitamins and minerals, including compounds that collectively constitute vitamin E, the tocols. Tocols are comprised of two subgroups, tocopherols and tocotrienols. Due to their potent antioxidant properties, attention has been given to the health benefits of tocols in oats. However, little is known about developmental aspects of their accumulation. Moreover, aside from their role in protecting membranes from oxidative damage, their possible physiological roles in planta have largely gone uninvestigated. In this study, we quantified tocol accumulation at five time points during oat seed development, and also compared tocol concentration and composition in the whole seed both to endosperm and embryos at a late stage of seed development. The temporal pattern of accumulation of the tocol subgroups was different. Both tocotrienols and tocopherols steadily increased over the course of seed development; however, tocotrienol progression was sigmoidal and tocopherol linear. By the end of seed development, tocotrienols were the most abundant tocol both in whole seed and in seed with embryos removed. In contrast, embryos contained higher concentrations of tocopherols than tocotrienols late in seed development. Differences in both temporal and spatial distribution during seed development suggest distinct roles for tocotrienols and tocopherols. Published by Elsevier Ltd.