Transcription factor that acts as a floral repressor. Controls flowering time by negatively regulating CONSTANS (CO) expression in a GIGANTEA (GI)-independent manner. Regulates the plant cold response by positive regulation of the cold response genes COR15A and KIN1. May coordinate cold response and flowering time. Expressed in aerial organs in early stages of seedling development. Circadian regulation with a peak of expression at dawn under continuous light conditions (PubMed:17653269). Circadian regulation with a peak of expression around dusk and lowest expression around dawn under continuous light conditions (at protein level) (PubMed:17653269). The NAC domain includes a DNA binding domain and a dimerization domain. Early flowering phenotype under long-day conditions. Hypersensitivity to cold. The gain-of-function mutant lov1-1D (T-DNA tagging) shows a late-flowering phenotype under long-day conditions, and freezing tolerance.