Cadmium-tolerance of transgenic Ipomoea aquatica expressing serine acetyltransferase and cysteine synthase

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<i>Ipomoea aquatica</i> (water spinach) is a common aquatic plant growing in lakes and wetlands in Southeast Asia. Due to its vigorous growth, they were considered to be potentially useful for remediation of polluted water with, for example, high sulfate and heavy metals. In previous studies, we successfully constructed transgenic <i>I. aquatica</i> plants, which simultaneously expressed two genes encoding serine acetyltransferase and cysteine synthase involved in sulfate assimilation pathways. Resulting transgenic plants were shown to rapidly grow and to accumulate sulfate at a high level. In the present study, we tested the effect of cadmium on their physiological and biochemical features. Upon hydroponical cultivation in the presence of 200 μM cadmium for 7 days, two transgenic lines (SR1 and SR2) accumulated 2- to 4-fold higher levels of cysteine and glutathione than the wild type control plants. When plantlets were exposed to 100 μM cadmium for 30 days, wild type and transgenic SR2 plantlets died, or growth was greatly retarded with reduced biomass, whereas transgenic SR1 exhibited a 1.7-fold increase in total biomass in comparison with the initial weight at day-0 of cadmium treatment. These results suggested that some transgenic plants expressing serine acetyltransferase and cysteine synthase could mitigate detrimental effects of cadmium toxicity, perhaps by efficiently producing and accumulating sulfuric compounds.

収録刊行物

  • Plant biotechnology  

    Plant biotechnology 25(2), 201-203, 2008-03-01 

    Japanese Society for Plant Cell and Molecular Biology

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各種コード

  • NII論文ID(NAID)
    10021913159
  • NII書誌ID(NCID)
    AA11250821
  • 本文言語コード
    ENG
  • 資料種別
    NOT
  • ISSN
    13424580
  • NDL 記事登録ID
    9423048
  • 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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