Lorrain Séverine, Genoud Thierry, Fankhauser Christian
Centre for Integrative Genomics, University of Lausanne, Genopode Building, CH-1015 Lausanne, Switzerland.
Curr Opin Plant Biol. 2006 Oct;9(5):509-14. doi: 10.1016/j.pbi.2006.07.013.
Ambient light conditions trigger both developmental transitions, such as the induction of flowering, and a suite of adaptive responses, exemplified by the shade-avoidance syndrome. These responses are initiated by three families of photoreceptors that are conserved in all higher plants: the phototropins, cryptochromes and phytochromes (phyA--phyE, cry1--cry3, phot1 and phot2 in Arabidopsis). Molecular genetic studies performed mainly in Arabidopsis indicate that photon capture by these light sensors usually initiates rapid changes in the gene expression profile, leading to plant adaptation to their environment. Interestingly, numerous transcription factors are early targets of light regulation, both at the transcriptional and post-transcriptional levels.
环境光照条件既会触发发育转变，比如诱导开花，也会引发一系列适应性反应，以避荫综合征为例。这些反应由所有高等植物中都保守的三类光感受器启动：向光素、隐花色素和植物色素（拟南芥中的phyA-phyE、cry1-cry3、phot1和phot2）。主要在拟南芥中进行的分子遗传学研究表明，这些光传感器捕获光子通常会引发基因表达谱的快速变化，从而导致植物适应其环境。有趣的是，许多转录因子在转录和转录后水平上都是光调节的早期靶点。
