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Temperature-dependent regulation of flowering by antagonistic FLM variants

机译：拮抗FLM变体对开花的温度依赖性调节

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摘要

The appropriate timing of flowering is crucial for plant reproductive success. It is therefore not surprising that intricate genetic networks have evolved to perceive and integrate both endogenous and environmental signals, such as carbohydrate and hormonal status, photoperiod and temperature. In contrast to our detailed understanding of the vernalization pathway, little is known about how flowering time is controlled in response to changes in the ambient growth temperature. In Arabidopsis thaliana, the MADS-box transcription factor genes FLOWERING LOCUS M (FLM) and SHORT VEGETATIVE PHASE (SVP) have key roles in this process. FLM is subject to temperature-dependent alternative sphcing. Here we report that the two main FLM protein splice variants, FLM-p" and FLM-δ, compete for interaction with the floral repressor SVP. The SVP-FLM-β complex is predominately formed at low temperatures and prevents precocious flowering. By contrast, the competing SVP-FLM-5 complex is impaired in DNA binding and acts as a dominant-negative activator of flowering at higher temperatures. Our results show a new mechanism that controls the timing of the floral transition in response to changes in ambient temperature. A better understanding of how temperature controls the molecular mechanisms of flowering will be important to cope with current changes in global climate.
机译：开花的适当时机对植物繁殖成功至关重要。因此，毫不奇怪的是，复杂的遗传网络已经发展到感知和整合内源性和环境性信号，例如碳水化合物和激素状态，光周期和温度。与我们对春化途径的详细了解相反，对于如何响应环境生长温度的变化来控制开花时间知之甚少。在拟南芥中，MADS-box转录因子基因FLOWERING LOCUS M（FLM）和SHORT VEGETATIVE PHASE（SVP）在此过程中起关键作用。 FLM取决于温度的替代范围。在这里，我们报道两个主要的FLM蛋白剪接变体FLM-p“和FLM-δ竞争与阻花剂SVP的相互作用。SVP-FLM-β复合物主要在低温下形成并阻止早熟开花。 ，竞争的SVP-FLM-5复合物在DNA结合中受损，并在较高温度下充当开花的显性负激活剂，我们的结果表明了一种新的机制可以控制花转变的时机，以适应环境温度的变化。更好地理解温度如何控制开花的分子机制对于应对当前全球气候变化至关重要。

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  • 来源
    《Nature》 |2013年第7476期|414-417|共4页
  • 作者

    David Pose; Leonie Verhage; Felix Ott; Levi Yant; Johannes Mathieu; Gerco C Angenent; Richard G. H. Immink; Markus Schmid;

  • 作者单位

    Max Planck Institute for Developmental Biology, Department of Molecular Biology, Spemannstr. 35,72076 Tubingen, Germany,Instituto de Hortofruticultura Subtropicaly Spain;

    Plant Research International, Bioscience, Droevendaalsesteeg 1,6708 PB Wageningen, The Netherlands,Laboratory of Molecular Biology, Wageningen University, 6708 PB Wageningen, The Netherlands;

    Max Planck Institute for Developmental Biology, Department of Molecular Biology, Spemannstr. 35,72076 Tubingen, Germany;

    Max Planck Institute for Developmental Biology, Department of Molecular Biology, Spemannstr. 35,72076 Tubingen, Germany,Department of Organismic and Evolutionary Biology, Harvard University, 16 Divinity Avenue, Cambridge, Massachusetts 02138, USA;

    Max Planck Institute for Developmental Biology, Department of Molecular Biology, Spemannstr. 35,72076 Tubingen, Germany,Boyce Thompson Institute for Plant Research, Tower Road, Ithaca, New York 14853-1801, USA;

    Plant Research International, Bioscience, Droevendaalsesteeg 1,6708 PB Wageningen, The Netherlands,Laboratory of Molecular Biology, Wageningen University, 6708 PB Wageningen, The Netherlands;

    Plant Research International, Bioscience, Droevendaalsesteeg 1,6708 PB Wageningen, The Netherlands;

    Max Planck Institute for Developmental Biology, Department of Molecular Biology, Spemannstr. 35,72076 Tubingen, Germany;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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