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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Strigolactone signaling is required for auxin-dependent stimulation of secondary growth in plants
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Strigolactone signaling is required for auxin-dependent stimulation of secondary growth in plants

机译：生长激素依赖性刺激植物次生生长需要Strigolactone信号传导

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摘要

Long distance cell-to-cell communication is critical for the development of multicellular organisms. In this respect, plants are especially demanding as they constantly integrate environmental inputs to adjust growth processes to different conditions. One example is thickening of shoots and roots, also designated as secondary growth. Secondary growth is mediated by the vascular cambium, a stem cell-like tissue whose cell-proliferating activity is regulated over a long distance by the plant hormone auxin. How auxin signaling is integrated at the level of cambium cells and how cambium activity is coordinated with other growth processes are largely unknown. Here, we provide physiological, genetic, and pharmacological evidence that strigolactones (SLs), a group of plant hormones recently described to be involved in the repression of shoot branching, positively regulate cambial activity and that this function is conserved among species. We show that SL signaling in the vascular cambium itself is sufficient for cambium stimulation and that it interacts strongly with the auxin signaling pathway. Our results provide a model of how auxin-based long-distance signaling is translated into cambium activity and suggest that SLs act as general modulators of plant growth forms linking the control of shoot branching with the thickening of stems and roots.
机译：长距离的细胞间通信对于多细胞生物的发展至关重要。在这方面，植物特别要求苛刻，因为它们不断整合环境投入，以根据不同条件调整生长过程。一个例子是芽和根的增厚，也称为二次生长。次级生长由血管形成层介导，血管形成层是一种干细胞样组织，其细胞增殖活性受到植物激素生长素的长距离调节。生长素信号如何在形成层细胞水平整合以及形成层活性如何与其他生长过程协调的机制尚不清楚。在这里，我们提供了生理，遗传和药理学证据，表明草甘酸内酯（SLs）是一种植物激素，最近被描述与抑制枝条的分支有关，它们正调控着冈比亚的活动，并且这种功能在物种之间是保守的。我们显示，在血管形成层本身中的SL信号足以刺激形成层，并且它与生长素信号传导路径强烈相互作用。我们的结果提供了一个模型，该模型将基于生长素的长距离信号转导为形成层活性，并表明SL充当植物生长形式的一般调节剂，将芽的分支控制与茎和根的增厚联系在一起。

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  • 作者

    Javier Agusti; Silvia Herold; Martina Schwarz; Pablo Sanchez; Karin Ljung; Elizabeth A. Dun; Philip B. Brewer; Christine A. Beveridge; Tobias Sieberer; Eva M. Sehr; Thomas Greb;

  • 作者单位

    Gregor Mendel Institute of Molecular Plant Biology, Austrian Academy of Sciences, 1030 Vienna, Austria Institute of Chemical Engineering, Vienna University of Technology,Gumpendorferstrasse 1a, 1060 Vienna, Austria Roche Diagnostics, Engelhorngasse 3, 1211 Vienna, Austria;

    Gregor Mendel Institute of Molecular Plant Biology, Austrian Academy of Sciences, 1030 Vienna, Austria Institute of Chemical Engineering, Vienna University of Technology,Gumpendorferstrasse 1a, 1060 Vienna, Austria Roche Diagnostics, Engelhorngasse 3, 1211 Vienna, Austria;

    Gregor Mendel Institute of Molecular Plant Biology, Austrian Academy of Sciences, 1030 Vienna, Austria Institute of Chemical Engineering, Vienna University of Technology,Gumpendorferstrasse 1a, 1060 Vienna, Austria Roche Diagnostics, Engelhorngasse 3, 1211 Vienna, Austria;

    Gregor Mendel Institute of Molecular Plant Biology, Austrian Academy of Sciences, 1030 Vienna, Austria Institute of Chemical Engineering, Vienna University of Technology,Gumpendorferstrasse 1a, 1060 Vienna, Austria Roche Diagnostics, Engelhorngasse 3, 1211 Vienna, Austria;

    Umea Plant Science Center, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, SE-901 83 UmeS, Sweden;

    School of Biological Sciences, University of Queensland,St. Lucia QLD 4072, Australia;

    School of Biological Sciences, University of Queensland,St. Lucia QLD 4072, Australia;

    School of Biological Sciences, University of Queensland,St. Lucia QLD 4072, Australia;

    Max F. Perutz Laboratories, Department of Microbiology, Immunobiology, and Genetics, University of Vienna, 1030 Vienna, Austria Department of Plant Sciences, Technische Universitat Munchen-Wei-henstephan, Liesel Beckmann Str. 1, 85354 Freising, Germany;

    Gregor Mendel Institute of Molecular Plant Biology, Austrian Academy of Sciences, 1030 Vienna, Austria Institute of Chemical Engineering, Vienna University of Technology,Gumpendorferstrasse 1a, 1060 Vienna, Austria Roche Diagnostics, Engelhorngasse 3, 1211 Vienna, Austria;

    Gregor Mendel Institute of Molecular Plant Biology, Austrian Academy of Sciences, 1030 Vienna, Austria Institute of Chemical Engineering, Vienna University of Technology,Gumpendorferstrasse 1a, 1060 Vienna, Austria Roche Diagnostics, Engelhorngasse 3, 1211 Vienna, Austria;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    meristem; wood production; MORE AXILLARY BRANCHES;

    机译：分生组织木材生产;更多腋下分支;

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