Enhanced Resistance to Blast Fungus and Bacterial Blight in Transgenic Rice Constitutively Expressing OsSBP, a Rice Homologue of Mammalian Selenium-binding Proteins

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The rice <I>Oryza sativa</I> selenium-binding protein homologue (<I>OsSBP</I>) gene encodes a homologue of mammalian selenium-binding proteins, and it has been isolated as one of the genes induced by treating a plant with a cerebroside elicitor from rice blast fungus. The possible role of <I>OsSBP</I> in plant defense was evaluated by using a transgenic approach. Plants overexpressing <I>OsSBP</I> showed enhanced resistance to a virulent strain of rice blast fungus as well as to rice bacterial blight. The expression of defense-related genes and the accumulation of phytoalexin after infection by rice blast fungus were accelerated in the <I>OsSBP</I> overexpressors. A higher level of H<SUB>2</SUB>O<SUB>2</SUB> accumulation and reduced activity of such scavenging enzymes as ascorbate peroxidase and catalase were seen when the <I>OsSBP</I>-overexpressing plants were treated with the protein phosphatase 1 inhibitor, calyculin A. These results suggest that the upregulation of <I>OsSBP</I> expression conferred enhanced tolerance to different pathogens, possibly by increasing plant sensitivity to endogenous defense responses. Additionally, the OsSBP protein might have a role in modulating the defense mechanism to biotic stress in rice.

収録刊行物

  • Bioscience, biotechnology, and biochemistry

    Bioscience, biotechnology, and biochemistry 68(4), 873-880, 2004-04-23

    Japan Society for Bioscience, Biotechnology, and Agrochemistry

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各種コード

  • NII論文ID(NAID)
    10013143900
  • NII書誌ID(NCID)
    AA10824164
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    09168451
  • NDL 記事登録ID
    6930368
  • NDL 雑誌分類
    ZR7(科学技術--農林水産--農産) // ZR2(科学技術--生物学--生化学) // ZP1(科学技術--化学・化学工業)
  • NDL 請求記号
    Z53-G223
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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