关键词: 维生素E, 合成途径, 前体物质, 生物强化, 遗传

Abstract: Vitamin E is a kind of fat-soluble antioxidant and it is synthesized only by photosynthetic organisms. Vitamin E is an important and indispensable vitamin for human and livestock. Due to the low content of vitamin E in plants, most of people are in a state of chronic deficiency of vitamin E——“hidden hunger”. Synthetic vitamin E is supplemented in the feed for optimal animal growth. Therefore, increasing the content of vitamin E in plants is one of the important ways to improve vitamin E deficiency. Starting from the biosynthetic pathway of vitamin E, this paper summarized the influence of key enzymes expression and precursors content on vitamin E in detail, pointed out that the biofortification effect of tocotrienol and α-tocopherol was efficient, while the increase of tocopherol content was limited. Furthermore, the reasons for the limitation of vitamin E biosynthesis and other metabolic pathways that may affect vitamin E synthesis were discussed from the genetic point of view. Finally, a new idea was proposed for vitamin E biofortification in the future by combining with the regulatory factors that may affect the biosynthesis of vitamin E and the transport of its precursors.

Key words: vitamin E, biosynthetic pathway, precursor, biofortification, genetic