An Unusual Spliced Variant of DELLA Protein, a Negative Regulator of Gibberellin Signaling, in Lettuce

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DELLA proteins are negative regulators of the signaling of gibberellin (GA), a phytohormone regulating plant growth. DELLA degradation is triggered by its interaction with GID1, a soluble GA receptor, in the presence of bioactive GA. We isolated cDNA from a spliced variant of <I>LsDELLA1</I> mRNA in lettuce, and named it <I>LsDELLA1sv</I>. It was deduced that <I>LsDELLA1sv</I> encodes truncated LsDELLA1, which has DELLA and VHYNP motifs at the N terminus but lacks part of the C-terminal GRAS domain. The recombinant LsDELLA1sv protein interacted with both <I>Arabidopsis</I> GID1 and lettuce GID1s in the presence of GA. A yeast two-hybrid assay suggested that LsDELLA1sv interacted with LsDELLA1. The ratio of <I>LsDELLA1sv</I> to <I>LsDELLA1</I> transcripts was higher in flower samples at the late reproductive stage and seed samples (dry seeds and imbibed seeds) than in the other organ samples examined. This study suggests that LsDELLA1sv is a possible modulator of GA signaling in lettuce.

収録刊行物

  • Bioscience, biotechnology, and biochemistry

    Bioscience, biotechnology, and biochemistry 76(3), 544-550, 2012-03-23

    公益社団法人 日本農芸化学会

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各種コード

  • NII論文ID(NAID)
    10030750762
  • 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
    023553829
  • NDL 請求記号
    Z53-G223
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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