Either Soluble or Plastidic Expression of Recombinant Protoporphyrinogen Oxidase Modulates Tetrapyrrole Biosynthesis and Photosynthetic Efficiency in Transgenic Rice(Biochemistry & Molecular Biology)

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概要

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• Protoporphyrinogen oxidase (Protox) is the last shared enzyme of the porphyrin pathway. As a continuation of our previous work in which the transgenic rice plants expressing the Bacillus subtilis Protox in the cytoplasm or the plastid showed resistance to diphenyl ether herbicide, this study was undertaken to identify the effects of tertapyrrole biosynthesis in these transgenic rice plants. The transgenic plants either targeted into plastids or expressed in cytoplasm showed higher Protox activity than wild-type plants did. Photosynthetic activity, measured as a quantum yield of photosystem II, was slightly higher in transgenic plants than in wild-type plants, but chlorophyll contents were not significantly different between transgenic and wild-type plants. As for porphyrin biosynthesis, both cytoplasmexpressed and plastid-targeted transgenic plants showed increased synthesis of aminolevulinic acid, Mg-Proto IX, and protoheme in comparison to wild-type plants whereas synthesis of protoporphyrin IX was similar for wild-type and transgenic plants. These results indicate that either cytoplasm or plastid expression of B. subtilis Protox in rice can upregulate the porphyrin pathway leading to increase in photosynthetic efficiency in plants.

• 社団法人日本農芸化学会の論文
• 2003-07-23

著者

• Lee Hee

  School of Plant Science, Seoul National University

• Back Kyoungwhan

  Department Of Biotechnology Biotechnology Research Institute Chonnam National University

• Jung Sunyo

  Scigen Harvest Research Center

• Lee Hee

  School Of Electrical Engineering And Computer Science Division Of Electrical Engineering Korea Advan

• JANG Sun

  Department of Science Education, Ewha Womans University

• Lee H

  School Of Plant Science Seoul National University

• Guh J

  Institute Of Agricultural Science And Technology Chonnam National University

• Jang Sun

  Department Of Electrical Information And Control Engineering Hongik University

• Guh Ja

  Institute Of Agricultural Science And Technology Chonnam National University

• CHUNG Jung

  Institute of Agricultural Science and Technology, Chonnam National University

• CHON Sang-Uk

  Biotechnology Industrialization Center, Dongshin University

• KIM Kyung-Moon

  Scigen Harvest Research Center

• HA Suk

  Department of Biotechnology, Biotechnology Research Institute, Chonnam National University

• Ha Suk

  Department Of Biotechnology Biotechnology Research Institute Chonnam National University

• Chon Sang-uk

  Biotechnology Industrialization Center Dongshin University

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