Improvement of environmental stress tolerance of sweet potato by introduction of genes for spermidine synthase

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With the purpose of enhancing environmental stress tolerance of sweet potato (<i>Ipomoea batatas</i>, cv. Kokei 14), we transformed this plant with spermidine synthase genes derived from <i>Cucurbita ficifolia</i> (<i>FSPD1</i>). The <i>FSPD1</i>-transgenic plants showed twice as high spermidine content as the wild type (WT) counterpart in both leaves and storage roots. One of the most characteristic features of the transgenic plants was the increase in the number of storage roots formed under both non-stress and stressful environments. Salt and drought stresses suppressed storage root growth, but the transgenic plants were less affected producing significantly larger mass of storage roots and starches than WT plants under either stress. The transgenic plants also showed increased tolerance to chilling- and heat-mediated damage to photosynthesis compared to the WT plants. Thus, sweet potato was made more tolerant to environmental stresses through introduction of the <i>FSPD1</i> genes. This improved tolerance may involve enhanced oxidative stress tolerance at least partially because the transgenic plants were more tolerant to paraquat, a potent oxidative stress inducer, than the WT plants. From these results, the <i>FSPD1</i> gene is considered useful for gene transfer technology aiming at improving environmental stress tolerance of sweet potato.

収録刊行物

  • Plant biotechnology  

    Plant biotechnology 23(1), 75-83, 2006-03-01 

    Japanese Society for Plant Cell and Molecular Biology

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各種コード

  • NII論文ID(NAID)
    10021907936
  • 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
    7857154
  • NDL 雑誌分類
    ZR3(科学技術--生物学--植物)
  • 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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