Sequential Regulation of Gibberellin, Brassinosteroid, and Jasmonic Acid Biosynthesis Occurs in Rice Coleoptiles to Control the Transcript Levels of Anti-Microbial Thionin Genes

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Transcripts of <I>thionin</I> genes encoding antimicrobial peptides were present at a high level in rice coleoptiles just after germination, and decreased to an undetectable level after about 3 d, but this decline was suppressed by co-treatment with gibberellic acid (GA<SUB>3</SUB>) and brassinolide (BL). The temporal expression patterns of key enzyme genes for the biosyntheses of gibberellins (GAs) and brassinosteroids (BRs) were correlated with the fluctuation of <I>thionin</I> mRNAs. Jasmonic acid (JA) replaced the effect of GA<SUB>3</SUB> and BL, and its change in endogenous level was parallel to that of the <I>thionin</I> genes. These results strongly suggest that <I>thionin</I> gene expression was positively regulated by JA, whose endogenous level was synergistically regulated by GAs and BRs. In contrast, <I>thionin</I> gene expression in etiolated seedlings remained high while the endogenous level of JA was low, suggesting the presence of another signaling pathway in the dark to maintain the <I>thionin</I> level.

収録刊行物

  • Bioscience, biotechnology, and biochemistry  

    Bioscience, biotechnology, and biochemistry 70(10), 2410-2419, 2006-10-23 

    Japan Society for Bioscience, Biotechnology, and Agrochemistry

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各種コード

  • NII論文ID(NAID)
    10018525657
  • 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
    8523812
  • 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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