Abstract: UV-B, as an inherent constituent of sunlight, exerts a crucial influence on the growth and development of plants. With the deepening of researches, it is recognized that UV-B is not merely an environmental stressor, but also a significant signal molecule in the plant growth process, and moderate UV-B radiation has a certain promoting effect on plant growth. UVR8, as a unique photoreceptor specific to UV-B, plays an irreplaceable role in the plant’s response to UV-B, and the exertion of its specific functions still depends on transcription factors. Differentially expressed gene is a key element in the developmental process of multicellular eukaryotes, and transcription factors can regulate gene expression, thus transcription factors are typically the main regulatory genes for the development of such organisms. At present, a variety of transcription factors such as BBXs, WRKYs, MYBs, and PIFs have been reported to be involved in regulating processes like hypocotyl elongation, primary root length, leaf size and shape, flowering cycle, and anthocyanin synthesis under UV-B conditions. This article mainly reviews the molecular mechanisms of UVR8 in the UV-B signaling pathway and summarizes the regulatory mechanisms of transcription factors during the UV-B radiation process, and to provide reference for relevant research.

Key words: UVR8,  transcription factor,  UV-B radiation,  plant