Probable transcription factor that acts as a negative regulator of freezing tolerance via a CBF-independent pathway. Expressed in roots, leaves, stems, petioles, filaments, stigma, pedicels, sepals, anthers, petals, and siliques. Induced by drought, salt and abscisic acid (ABA). Down-regulated by cold. No visible phenotype under normal growth conditions, but mutant plants show increased tolerance to freezing. Repression of MYBC1/MTF1 promotes Arabidopsis plant transformation by Agrobacterium tumefaciens.