Probable transcription factor involved in the regulation of flowering time under long day (LD) conditions. Functions as repressor of flowering. Controls flowering time by negatively regulating the expression of HD3A (PubMed:23713079, PubMed:25378698). Acts downstream of the phytochrome B to repress the expression of EHD1, an activator of the flowering promoter genes HD3A and RFT1 (PubMed:25378698). Controls photoperiodic flowering response. Seems to be one of the component of the circadian clock. Expression of several members of the ARR-like family is controlled by circadian rhythm. The particular coordinated sequential expression of PRR73, PRR37, PRR95, PRR59 and PPR1 result to circadian waves that may be at the basis of the endogenous circadian clock (By similarity). Expressed with a circadian rhythm showing a broad peak in the middle day under long day (LD) conditiions. The cultivar Kitaake contains a non-synonymous substitution of the conserved residue Leu-710 to Pro-710, which confers a reduced photoperiod sensitivity (PS) response, early flowering, and allows the cultivar Kitaake to grow in high latitudes with long photoperiod conditions. Belongs to the ARR-like family. Lacks the phospho-accepting Asp (here Glu-114), present in the receiver domain, which is one of the conserved features of two-component response regulators (ARRs) family.