MAP3Kδ4, an Arabidopsis Raf-like MAP3K, regulates plant growth and shoot branching

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MAP3Kδ4 (At4g23050) is a Raf-like mitogen-activated protein kinase kinase kinase (MAP3K) in <i>Arabidopsis thaliana</i>, classified as subgroup B2. The B2 subgroup MAP3Ks have a kinase domain in the C-terminus and a PAS domain in the N-terminal region. PAS domains are found in a variety of proteins and are reported to mediate protein–protein interactions and to sense environmental stimuli. However, the function of MAP3Kδ4 has not yet been determined. We generated transgenic plants constitutively expressing <i>MAP3Kδ4</i> or its kinase-negative mutant (<i>MAP3Kδ4KN</i>) and characterized their physiological traits. The transgenic plants overexpressing <i>MAP3Kδ4</i> showed earlier bolting than wild-type plants. They also showed more vigorous growth by both fresh weight and stem length. In contrast, the transgenic plants overexpressing <i>MAP3Kδ4KN</i> showed a highly branched phenotype; <i>MAP3Kδ4</i> overexpression had no effect on branch number. These results indicated that MAP3Kδ4 is crucial to regulating both plant growth and shoot branching. In addition, <i>MAP3Kδ4</i> transcripts were found in all <i>Arabidopsis</i> tissues examined and upregulated by auxin treatment in seedlings, suggesting that MAP3Kδ4 functions in an auxin-dependent manner.

収録刊行物

  • Plant biotechnology

    Plant biotechnology 28(5), 463-470, 2011-12-25

    日本植物細胞分子生物学会

参考文献:  34件中 1-34件 を表示

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各種コード

  • NII論文ID(NAID)
    10030303959
  • NII書誌ID(NCID)
    AA11250821
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13424580
  • NDL 記事登録ID
    023386160
  • NDL 請求記号
    Z54-J126
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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