The circadian clock modulates plant responses to environmental stimuli. In a recent study we showed that light and the circadian clock regulate daily changes in sensitivity to short treatments of high UV-B. Here we demonstrate that these time dependent changes in UV-B stress sensitivity are not mediated by the UV-B receptor UV resistantce locus 8. We also discuss the potential mechanisms involved in this process and the role of the circadian clock in the acclimation to UV-B.
Keywords: COP1, CONSTITUTIVELY PHOTOMORPHOGENIC 1; ELF3, EARLY FLOWERING 3; ELF4, EARLY FLOWERING 4; HY5, ELONGATED HYPOCOTYL 5; HYH, HY5 HOMOLOGUE; LUX, LUX ARRHYTHMO; PHR1, PHOTOLYASE 1; UV-B, circadian, UVR8, stress, adaptation, transcription; UVH1, ULTRAVIOLET HYPERSENSITIVE 1; UVR3, UV RESISTANCE LOCUS 3; UVR8, UV RESISTANCE LOCUS 8.