在茂密的植被中生长的植物需要灵活地定位其光合器官,以确保在竞争环境中获得最佳的光捕获。他们通过一系列称为避荫综合症的发育反应来做到这一点。Belowground,根发育也会根据地上邻居的接近程度进行调整。遮篷是动态和复杂的环境,具有远红色的异质光线索,红色,蓝色和紫外光谱,可以通过空间分离的植物组织用光感受器感知。通过植物色素相互作用因子(PIF)转录因子和生长相关激素如生长素调节植物结构,赤霉素,从历史上对油菜素类固醇和脱落酸进行了研究,而没有过多关注空间或组织特异性环境。最近的发展和技术,然而,激发了人们对避免遮荫规定的空间明确理解的浓厚兴趣。其他环境因素,如温度和营养可用性与分子遮荫避免调节网络相互作用,通常取决于信号的空间位置,和反应器官。这里,我们的目标是回顾植物如何应对异质光信号,并将这些信号与其他环境信号相结合的最新进展。
Plants growing in dense vegetation stands need to flexibly position their photosynthetic organs to ensure optimal light capture in a competitive environment. They do so through a suite of developmental responses referred to as the shade avoidance syndrome. Belowground, root development is also adjusted in response to aboveground neighbour proximity. Canopies are dynamic and complex environments with heterogenous light cues in the far-red, red, blue and UV spectrum, which can be perceived with photoreceptors by spatially separated plant tissues. Molecular regulation of plant architecture adjustment via PHYTOCHROME-INTERACTING FACTOR (PIF) transcription factors and growth-related hormones such as auxin, gibberellic acid, brassinosteroids and abscisic acid were historically studied without much attention to spatial or tissue-specific context. Recent developments and technologies have, however, sparked strong interest in spatially explicit understanding of shade avoidance regulation. Other environmental factors such as temperature and nutrient availability interact with the molecular shade avoidance regulation network, often depending on the spatial location of the signals, and the responding organs. Here, we aim to review recent advances in how plants respond to heterogenous light cues and integrate these with other environmental signals.