Department of Evolutionary Biology, Ecology, and Environmental Sciences, University of Barcelona, Faculty of Biology, Av. Diagonal 643, E-08028 Barcelona, Spain.
Department of Evolutionary Biology, Ecology, and Environmental Sciences, University of Barcelona, Faculty of Biology, Av. Diagonal 643, E-08028 Barcelona, Spain.
Trends Plant Sci. 2019 Nov;24(11):1040-1051. doi: 10.1016/j.tplants.2019.08.006. Epub 2019 Oct 9.
Vitamin E, which includes both tocopherols and tocotrienols, comprises lipid-soluble antioxidants that modulate lipid peroxidation. Recently, significant advances have been made in our understanding of vitamin E biosynthesis, transport, and function. The phytyl moiety from chlorophyll degradation is used for tocopherol biosynthesis. An α-tocopherol-binding protein (TBP) has been identified in tomato (SlTBP) serving in intraorganellar vitamin E transport in plants. Moreover, α-tocopherol not only scavenges free radicals through flip-flop movements in the lipid bilayer, but may also contribute to fine-tuning the transmission of specific signals outside chloroplasts. Vitamin E, and α-tocopherol in particular, appear to be essential for plant development and help to provide the most suitable response to a number of environmental stresses.
维生素 E 包括生育酚和三烯生育酚，是一类脂溶性的抗氧化剂，可以调节脂质过氧化。近年来，我们对维生素 E 生物合成、运输和功能的理解取得了重大进展。叶绿素降解产生的植基部分用于生育酚的生物合成。在植物中，已经鉴定出一种α-生育酚结合蛋白（TBP）（SlTBP），它在细胞器内的维生素 E 运输中发挥作用。此外，α-生育酚不仅通过在脂质双层中的翻转运动清除自由基，还可能有助于微调叶绿体外特定信号的传递。维生素 E，特别是α-生育酚，似乎对植物的发育至关重要，并有助于对许多环境胁迫做出最合适的反应。
