Light signal perceived by the red/far-red absorbing phytochrome (phy) family of photoreceptors regulates plant growth and development throughout the life cycle. Phytochromes regulate the light-triggered physiological responses by controlling gene expression both at the transcriptional and post-transcriptional levels. Recent large-scale RNA-seq studies have demonstrated the roles of phys in altering the global transcript diversity by modulating the pre-mRNA splicing in response to light. Moreover, several phy-interacting splicing factors/regulators from different species have been identified using forward genetics and protein–protein interaction studies, which modulate the light-regulated pre-mRNA splicing. In this article, we summarize our current understanding of the role of phys in the light-mediated pre-mRNA splicing and how that contributes to the regulation of gene expression to promote photomorphogenesis.

光感受器的红色/远红色吸收光敏色素 (phy) 家族感知的光信号调节植物整个生命周期的生长和发育。光敏色素通过在转录和转录后水平控制基因表达来调节光触发的生理反应。最近的大规模 RNA-seq 研究证明了 phys 通过调节前 mRNA 响应光剪接来改变全局转录本多样性的作用。此外，利用正向遗传学和蛋白质-蛋白质相互作用研究，已鉴定出来自不同物种的几种 phy 相互作用剪接因子/调节剂，它们调节光调节的前 mRNA 剪接。在本文中，我们总结了目前对 phys 在光介导的前 mRNA 剪接中的作用的理解，以及它如何有助于调节基因表达以促进光形态发生。