The photoreceptor UVR8 mediates the perception of both UV‐B and UV‐A wavelengths up to 350 nm of sunlight with responsivity moderated by cryptochromes

• DOI: 10.1111/pce.13752
• Publication Date: 2020-03-13T14:21:14Z
• Authors: Neha Rai; Andrew O'Hara; Daniel Farkas; Omid Safronov; Khuanpiroon Ratan...; Fang Wang; Anders V. Lindfors; Gareth I. Jenkins; Tarja Lehto; Jarkko Salojärvi; Mikael Brosché; Åke Strid; Pedro J. Aphalo; Luis O. Morales
• Keywords: Sunlight; Photomorphogenesis; Ultraviolet; Photobiology; Visible spectrum

The photoreceptors UV RESISTANCE LOCUS 8 (UVR8) and CRYPTOCHROMES 1 2 (CRYs) play major roles in the perception of UV-B (280-315 nm) UV-A/blue radiation (315-500 nm), respectively. However, it is poorly understood how they function sunlight. UVR8 CRYs were assessed a factorial experiment with Arabidopsis thaliana wild-type photoreceptor mutants exposed to sunlight for 6 or 12 hr under five types filters cut-offs blue-light regions. Transcriptome-wide responses triggered by UV-A wavelengths shorter than 350 nm (UV-Asw ) required whereas those induced blue longer (UV-Alw CRYs. modulated gene expression response light while lack drastically enhanced UV-Asw . These results agree our estimates photons absorbed these vitro monomerization up 335 nm. Motif enrichment analysis predicted complex signaling downstream Our highlight that important use waveband definitions specific plants' photomorphogenesis as routinely done visible region.