Progress of research on ascorbate biosynthesis in plants

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  • Ishikawa Takahiro
    Institute of Agricultural and Sciences, Academic Assembly, Shimane University

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Other Title
  • 植物のアスコルビン酸生合成研究の現状（特集　第1回ビタミンC研究委員会シンポジウム「今，ビタミンCが面白い」）
  • 植物のアスコルビン酸生合成研究の現状
  • ショクブツ ノ アスコルビンサン セイゴウセイ ケンキュウ ノ ゲンジョウ

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Abstract

Plants contain a large amount of ascorbic acid and also provide the major source of vitamin C in the human diet. Recently, biochemical and molecular genetic evidence identifies biosynthesis from GDP-D-mannose via L-galactose (D-Man/L-Gal pathway or Smirnoff-Wheleer pathway) as an essential pathway of ascorbate in plants. Among genes involved in the D-Man/L-Gal pathway, VTC2 encoding GDP-L-Gal phosphorylase plays a key role in controlling ascorbate biosynthesis in response to light. In addition to the D-Man/L-Gal pathway, evidence for another pathway via D-galacturonate has been obtained from biochemical analyses by a phytoflagellated protozoan, Euglena gracilis , and mature fruits such as strawberry and tomato. Now, fundamental knowledge to understand how plants accumulate a large amount of ascorbate has been provided well.

Journal

  • VITAMINS

    VITAMINS 94 (8), 438-442, 2020-08-25

    THE VITAMIN SOCIETY OF JAPAN

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