Transcription factor involved in phytochrome A-mediated cotyledon opening. Controlled by the central oscillator mediated by LHY and CCA1. Part of a regulatory circadian feedback loop. Regulates its own expression. Circadian-regulation. Peak of transcript abundance near subjective dawn. Up-regulated transiently by red light and far red light. No effect on the regulation of core clock associated genes or on the hypocotyl length. Rve1, rve2 and rve7 triple mutant has no alteration in the period or phase of the clock.