Involved in flowering time regulation. Required for FRI-mediated up-regulation of FLC transcripts. Partially redundant with FRL1. In cv. Columbia and cv. Landsberg erecta, either FRL1 or FRL2, but not both, is functional and required for FRI-mediated up-regulation of FLC (PubMed:17056759). Belongs to the Frigida family. The protein in cv. Landsberg erecta and cv. Columbia (AC Q9C6S2) only differ by two residues in positions 132 and 401 (Ala to Pro and Leu to Gln changes, respectively); these variations leading to inactivate the protein in cv. Columbia.