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Acta Prataculturae Sinica ›› 2009, Vol. 18 ›› Issue (5): 235-243.

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Progress in vitamin E synthesis-related enzyme gene cloning and stress physiology in plants

ZHANG Yi-gong, ZHANG Li-jing, FU Hua   

  1. Key Laboratory of Grassland Agro-ecosystem, Ministry of Agriculture, College of Pastoral
    Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China
  • Received:2008-11-20 Online:2009-10-20 Published:2009-10-20

Abstract: Vitamin E is an important class of lipid-soluble compounds with antioxidant activities. It can be synthesized in the photosynthetic organs of higher plants and cyanobacteria. The eight natural products of vitamin E (designated as α,β,γ,δ-tocopherol and α,β,γ,δ-ocotrienol) play an important role in human and animal life. In this article, the metabolic process of vitamin E in vivo, the current progress in synthesis-related enzyme gene cloning and manifestations of vitamin E transgenic plant in abiotic stress are summarized. At present, all the enzyme genes for vitamin E synthesis have been cloned from the model plant Arabidopsis thaliana and from Cyanobacteria. Vitamin E genes in over 26 plants have also been cloned and the functions of antioxidant activities have been preliminarily clarified. In future work, the function and the relationships of vitamin E should be further clarified, especially the tocotrienols. The important values of tocopherols should be extended by the use of genetic engineering.

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