Molecular pathways regulating elongation of aerial plant organs: a focus on light, the circadian clock, and temperature
Molecular pathways regulating elongation of aerial plant organs: a focus on light, the circadian clock, and temperature
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DOI：
10.1111/tpj.14996
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发表时间：
2020-10-18
期刊：
影响因子：
7.2
通讯作者：
Sugimoto, Keiko
中科院分区：
文献类型：
--
作者：
Favero, David S.;Lambolez, Alice;Sugimoto, Keiko
下胚轴和叶柄等器官对遮荫和温度的反应迅速伸长，有助于提高植物适应性的适应性反应。这些器官的生长可塑性是通过复杂的分子信号网络实现的。除了从环境中传递信息外，这个信号网络还转换内部信号，例如与生物钟相关的信号。在拟南芥下胚轴中进行的大量研究，以及在较小程度上在叶柄中进行的研究，为理解调节气生植物器官伸长的信号网络提供了信息。特别是，在理解调节对光、生物钟和温度反应的分子机制方面取得了实质性进展。来自这三种刺激的信号汇聚在BAP模块上，BAP模块是一组相互依赖地促进基因转录和生长的三种不同类型的转录因子。其他受环境因素影响的关键生长正调控因子包括组成性光形态发生1（COP 1）和PHYA-105（SPA）E3泛素连接酶蛋白的供应商。在这篇综述中，我们总结了调节下胚轴和叶柄生长的关键信号传导途径，特别关注来自光，生物钟和温度的信号转导的重要分子机制。虽然很明显，在这两个器官中起作用的信号网络之间有很多相似之处，但下胚轴和叶柄中调节生长的机制之间也存在重要差异。
Organs such as hypocotyls and petioles rapidly elongate in response to shade and temperature cues, contributing to adaptive responses that improve plant fitness. Growth plasticity in these organs is achieved through a complex network of molecular signals. Besides conveying information from the environment, this signaling network also transduces internal signals, such as those associated with the circadian clock. A number of studies performed in Arabidopsis hypocotyls, and to a lesser degree in petioles, have been informative for understanding the signaling networks that regulate elongation of aerial plant organs. In particular, substantial progress has been made towards understanding the molecular mechanisms that regulate responses to light, the circadian clock, and temperature. Signals derived from these three stimuli converge on the BAP module, a set of three different types of transcription factors that interdependently promote gene transcription and growth. Additional key positive regulators of growth that are also affected by environmental cues include the CONSTITUTIVE PHOTOMORPHOGENIC 1 (COP1) and SUPPRESSOR OF PHYA-105 (SPA) E3 ubiquitin ligase proteins. In this review we summarize the key signaling pathways that regulate the growth of hypocotyls and petioles, focusing specifically on molecular mechanisms important for transducing signals derived from light, the circadian clock, and temperature. While it is clear that similarities abound between the signaling networks at play in these two organs, there are also important differences between the mechanisms regulating growth in hypocotyls and petioles.