regulated by MYB transcription factors. Many R2R3-MYB transcriptional activators are
known, but the prevalence of MYB repressors has only recently become recognized. This
review article summarizes recent progress on function and mechanism of these MYB
repressors. The characterized phenylpropanoid R2R3-MYB repressors comprise two
phylogenetic clades that act on the lignin and general phenylpropanoid genes, or the …