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首页> 外文期刊>Nature >NRT/PTR transporters are essential for translocation of glucosinolate defence compounds to seeds
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NRT/PTR transporters are essential for translocation of glucosinolate defence compounds to seeds

机译：NRT / PTR转运蛋白对于芥子油苷防御化合物向种子的转运至关重要

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摘要

In plants, transport processes are important for the reallocation of defence compounds to protect tissues of high value1, as demonstrated in the plant model Arabidopsis, in which the major defence compounds, glucosinolates2, are translocated to seeds on maturation3. The molecular basis for long-distance transport of glucosinolates and other defence compounds, however, remains unknown. Here we identify and characterize two members of the nitrate/peptide transporter family, GTR1 and GTR2, as high-affinity, protondependent glucosinolate-specific transporters. The gtr1 gtr2 double mutant did not accumulate glucosinolates in seeds and had more than tenfold over-accumulation in source tissues such as leaves and silique walls, indicating that both plasma membrane-localized transporters are essential for long-distance transport of glucosinolates. We propose that GTR1 and GTR2 control the loading of glucosinolates from the apoplasm into the phloem. Identification of the glucosinolate transporters has agricultural potential as a means to control allocation of defence compounds in a tissuespecific manner.
机译：在植物中，转运过程对于防御化合物的重新分配非常重要，以保护高价值的植物1，如拟南芥植物模型所证明的那样，其中主要的防御化合物芥子油苷2在成熟时易位到种子3。然而，芥子油苷和其他防御化合物的长距离运输的分子基础仍然未知。在这里，我们确定并表征了硝酸盐/肽转运蛋白家族的两个成员GTR1和GTR2，它们是高亲和力，质子依赖的芥子油苷特异性转运蛋白。 gtr1 gtr2双重突变体没有在种子中积累芥子油苷，并且在源组织（如叶子和长角果壁）中的积累超过十倍，表明这两个质膜定位的转运蛋白对于芥子油苷的长距离运输都是必不可少的。我们建议，GTR1和GTR2控制从根尖到韧皮部的芥子油苷的负载。芥子油苷转运蛋白的鉴定具有农业潜力，作为以组织特异性方式控制防御化合物分配的手段。

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  • 来源
    《Nature》 |2012年第7412期|p.531-534|共4页
  • 作者

    Hussam Hassan Nour-Eldin; Tonni Grube Andersen; Meike Burow; Svend Roesen Madsen; Morten Egevang Jφrgensen; Carl Erik Olsen; Ingo Dreyer; Rainer Hedrich; Dietmar Geiger; Barbara Ann Halkier;

  • 作者单位

    VKR Research Centre for Pro-Active Plants and DynaMo Center of Excellence, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40,1871 Frederiksberg C, Denmark;

    VKR Research Centre for Pro-Active Plants and DynaMo Center of Excellence, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40,1871 Frederiksberg C, Denmark;

    VKR Research Centre for Pro-Active Plants and DynaMo Center of Excellence, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40,1871 Frederiksberg C, Denmark;

    VKR Research Centre for Pro-Active Plants and DynaMo Center of Excellence, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40,1871 Frederiksberg C, Denmark;

    VKR Research Centre for Pro-Active Plants and DynaMo Center of Excellence, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40,1871 Frederiksberg C, Denmark;

    VKR Research Centre for Pro-Active Plants and DynaMo Center of Excellence, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40,1871 Frederiksberg C, Denmark;

    Centre for Plant Biotechnology and Genomics, Universidad Politecnica de Madrid, Campus de Montegancedo, Carretera M-40, E-28223 Pozuelo de Alarcon (Madrid), Spain;

    Julius-von-Sachs Institute, Molecular Plant Physiology and Biophysics, University of Wuerzburg Julius-von-Sachs-Platz 2, D-97082 Wurzburg, Germany;

    Julius-von-Sachs Institute, Molecular Plant Physiology and Biophysics, University of Wuerzburg Julius-von-Sachs-Platz 2, D-97082 Wurzburg, Germany;

    VKR Research Centre for Pro-Active Plants and DynaMo Center of Excellence, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40,1871 Frederiksberg C, Denmark;

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