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Production of plant with high ascorbic acid contents by metabolic engineering

Research Project

Project/Area Number 18K05620
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 39030:Horticultural science-related
Research InstitutionHiroshima University

Principal Investigator

FUJIKAWA YUKICHI  広島大学, 統合生命科学研究科(生), 講師 (10506687)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywordsアスコルビン酸 / 代謝工学 / 過剰発現 / 生合成酵素 / アセロラ / 遺伝子発現 / 共発現 / アスコルビン酸の強化 / 植物 / 局在解析 / 酵素 / プロモーター / 遺伝子組換え
Outline of Final Research Achievements

Ascorbic acid (vitamin C, AsA) is a major antioxidant against oxidative stress in plants and plays an important role in plant productivity. To pursue the strategy for efficiently manipulating AsA accumulation in plants, we attempted to modify the expression of AsA biosynthetic enzymes. As a result, the co-expression of three upstream enzymes (GMP, GME, and GGP) among the six AsA biosynthetic enzymes showed a significant increase in intracellular AsA contents. However, constitutive overexpression using CaMV35S may not enhance AsA as compared to transient overexpression.
Acerola MgGalLDH, the final enzyme of AsA biosynthesis in plants, has a mitochondrial localization signal in the N-terminal region. However, the localization modification of MgGalLDH alone may not enhance AsA in plants.

Academic Significance and Societal Importance of the Research Achievements

アスコルビン酸(ビタミンC, AsA)は活性酸素種に対する主要な抗酸化物質であり、植物生産の量的・質的強化に重要な役割を果たしている。AsAの生合成に着目した研究成果により、植物のAsA生合成強化に重要な酵素の候補を明らかにした。代謝工学的なアプローチによるAsA生合成の強化は、強光、乾燥、塩、低温、高温などの環境ストレスに対して植物生産が低下しない作物育種への応用が期待できる。また植物は様々な二次代謝産物を生産しているため、将来的には、植物における機能性物質の産生向上に関する応用展開に役立つことが期待できる。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (6 results)

All 2019 2018

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (4 results) (of which Invited: 1 results)

  • [Journal Article] Exogenous proline has favorable effects on growth and browning suppression in rice but not in tobacco2019

    • Author(s)
      Suekawa Marina、Fujikawa Yukichi、Esaka Muneharu
    • Journal Title

      Plant Physiology and Biochemistry

      Volume: 142 Pages: 1-7

    • DOI

      10.1016/j.plaphy.2019.06.032

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] High levels of expression of multiple enzymes in the Smirnoff-Wheeler pathway are important for high accumulation of ascorbic acid in acerola fruits2019

    • Author(s)
      Suekawa Marina、Fujikawa Yukichi、Inoue Akari、Kondo Takayuki、Uchida Eriko、Koizumi Takeshi、Esaka Muneharu
    • Journal Title

      Bioscience, Biotechnology, and Biochemistry

      Volume: 印刷中 Issue: 9 Pages: 1-4

    • DOI

      10.1080/09168451.2019.1608808

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] トマトのアスコルビン酸生合成改変による アスコルビン酸強化2019

    • Author(s)
      北村風花、國川彩香、坂本真吾、末川麻里奈、藤川愉吉、江坂宗春
    • Organizer
      第34回 バイオテクノロジー研究成果発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] アセロラにおけるアスコルビン酸生合成酵素遺伝子群の高発現に関する解析2019

    • Author(s)
      末川麻里奈,井上明香里,近藤隆之,藤川愉吉,内田絵理子,小泉雄史,江坂宗春
    • Organizer
      第60回日本植物生理学会年会
    • Related Report
      2018 Research-status Report
  • [Presentation] Elucidation of high accumulation mechanism of ascorbic acid in Acerola (Malpighia glabra)2019

    • Author(s)
      Yukichi Fujikawa, Marina Suekawa, Muneharu Esaka
    • Organizer
      日本植物学会第82回大会
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] 植物におけるアスコルビン酸生合成経路に関する研究2018

    • Author(s)
      末川麻里奈, 北村風花, 末永綾希, 井上明香里, 近藤隆之, 藤川愉吉, 江坂 宗春
    • Organizer
      第33回バイオテクノロジー研究成果発表会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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