The Contribution of Arabidopsis Homologs of L-Gulono-1,4-lactone Oxidase to the Biosynthesis of Ascorbic Acid

  • MARUTA Takanori
    Department of Advanced Bioscience, Faculty of Agriculture, Kinki University
  • ICHIKAWA Yaka
    Department of Advanced Bioscience, Faculty of Agriculture, Kinki University
  • MIEDA Takahiro
    Department of Advanced Bioscience, Faculty of Agriculture, Kinki University
  • TAKEDA Toru
    Department of Advanced Bioscience, Faculty of Agriculture, Kinki University
  • TAMOI Masahiro
    Department of Advanced Bioscience, Faculty of Agriculture, Kinki University
  • YABUTA Yukinori
    School of Agricultural, Biological, and Environmental Sciences, Faculty of Agriculture, Tottori University
  • ISHIKAWA Takahiro
    Faculty of Life and Environmental Science, Shimane University
  • SHIGEOKA Shigeru
    Department of Advanced Bioscience, Faculty of Agriculture, Kinki University

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  • The Contribution of<i>Arabidopsis</i>Homologs of<scp>L</scp>-Gulono-1,4-lactone Oxidase to the Biosynthesis of Ascorbic Acid

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Abstract

To clarify the involvement of seven Arabidopsis homologs of rat L-gulono-1,4-lactone (L-GulL) oxidase, AtGulLOs, in the biosynthesis of L-ascorbic acid (AsA), transgenic tobacco cells overexpressing the various AtGulLOs were generated. Under treatment with L-GulL, the levels of total AsA in three transgenic tobacco cell lines, overexpressing AtGulLO2, 3, or 5, were significantly increased as compared with those in control cells.

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