Center for Integrative Genomics, Faculty of Biology and Medicine, University of Lausanne, CH-1015 Lausanne, Switzerland.
Center for Integrative Genomics, Faculty of Biology and Medicine, University of Lausanne, CH-1015 Lausanne, Switzerland.
Curr Biol. 2017 Sep 11;27(17):R931-R940. doi: 10.1016/j.cub.2017.05.085.
Light is a vital resource for plants, which compete for it particularly in dense communities. Plants have multiple photosensory receptors to detect the presence of competitors and thereby adjust their growth and developmental strategies accordingly. Broadly speaking, plants fall into two categories depending on their response to shading by leaves: shade tolerant or shade avoiding. Here, we describe the photoperception mechanisms and the growth responses elicited by the neighboring vegetation in shade-avoiding plants, focusing on Arabidopsis thaliana, where these responses are best understood. The type of response depends on plant density, ranging from neighbor detection modulating growth in anticipation of future shading to the response to canopy shade where light resources are limiting. These diverse environments are sensed by various photoreceptors, and we will describe our current understanding of signal integration triggered by distinct light cues in diverse light conditions.
光是植物的重要资源，在密集的群落中，植物会为了争夺光而竞争。植物有多种光感受器来检测竞争者的存在，从而相应地调整其生长和发育策略。广义而言，根据对叶片遮荫的反应，植物可分为两类：耐荫或避荫。在这里，我们描述了避荫植物中光感知机制和由邻近植被引起的生长反应，重点介绍了这些反应在拟南芥中理解得最好的情况。反应的类型取决于植物密度，从预测未来遮荫的邻居检测调节生长到对限制光资源的冠层遮荫的反应。这些不同的环境由各种光感受器感知，我们将描述我们目前对不同光照条件下不同光信号触发的信号整合的理解。
