Light is one of the most important environmental signals and regulates many biological processes in plants. Studies on light-regulated development have mainly focused on aspects of shoot growth, such as de-etiolation, cotyledon opening, inhibition of hypocotyl elongation, flowering, and anthocyanin accumulation. However, recent studies have demonstrated that light is also involved in regulating root growth and development in Arabidopsis. In this review, we summarize the progress in understanding how shoots and roots coordinate their responses to light through different light-signaling components and pathways, including the COP1 (CONSTITUTIVELY PHOTOMORPHOGENIC 1), HY5 (ELONGATED HYPOCOTYL 5), and MYB73/MYB77 (MYB DOMAIN PROTEIN 73/77) pathways.

光是最重要的环境信号之一，调节植物的许多生物过程。光调控发育的研究主要集中在枝条生长方面，如去黄化、子叶开放、抑制下胚轴伸长、开花和花青素积累。然而，最近的研究表明，光也参与了拟南芥根系生长发育的调节。在这篇综述中，我们总结了在理解芽和根如何通过不同的光信号成分和途径协调它们对光的反应方面的进展，包括 COP1（组成性光敏 1）、HY5（ELONGATED HYPOCOTYL 5）和 MYB73/MYB77（MYB域蛋白 73/77) 途径。