Two OsGASR genes, rice GAST homologue genes that are abundant in proliferating tissues, show different expression patterns in developing panicles

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Two different types of genes for rice GA-stimulated transcript (GAST) homologue genes, <i>Oryza sativa </i>GA-stimulated transcript-related gene 1 (<i>OsGASR1</i>) and gene 2 (<i>OsGASR2</i>), were found. Both OsGASR proteins contain a cysteine-rich domain highly conserved among GAST family proteins in their C-terminal regions. Gibberellin A<sub>3</sub> (GA<sub>3</sub>) stimulated expression of both <i>OsGASRs</i> in the wild-type Nipponbare and GA<sub>3 </sub>synthesis-deficient mutant. Expression of both <i>OsGASRs</i> apparently increased when cell proliferation entered the logarithmic phase, and rapidly reduced when cell proliferation was temporarily halted. RT-PCR analysis indicated different expression patterns of these genes in developing panicles. <i>OsGASR1 </i>was limitedly but strongly expressed in florets while <i>OsGASR2 </i>was expressed in both florets and branches. <i>In situ </i>hybridization showed that they were strongly expressed in the root apical meristem (RAM) and shoot apical meristem (SAM), but little signals were detected in mature leaves. Transient expression of OsGASR-GFP fusion proteins in onion epidermal cells revealed that both OsGASR proteins localized to the apoplasm or cell wall. These results suggest that <i>OsGASR1</i> and <i>OsGASR2 </i>were involved in cell division and might play diverse roles in differentation of panicles.<br>

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  • Genes & genetic systems  

    Genes & genetic systems 81(3), 171-180, 2006-06-25 

    The Genetics Society of Japan

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各種コード

  • NII論文ID(NAID)
    10018212657
  • NII書誌ID(NCID)
    AA11077421
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13417568
  • NDL 記事登録ID
    7997907
  • NDL 雑誌分類
    ZR1(科学技術--生物学)
  • NDL 請求記号
    Z53-W539
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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