Abstract：

Polycomb (PcG) and trithorax (trxG) are two groups of conserved epigenetic complexes that maintain active and repressive states of target genes by altering their chromatin states to regulate plant development and stress responses. In the conventional view, PcG and trxG proteins often function antagonistically in transcriptional gene regulation, based on the observation that mutations in trxG and PcG genes can counteract each other’s activity, whereas mutations of genes within each group have synergistic effects (Pu and Sung, 2015). Despite this general tendency, a

growing body of evidence suggests that there is no overall synergism or antagonism between and within the trxG and PcG proteins. Instead, there is a nuanced and intricate synergistic interaction, establishing a mutual regulatory relationship between PcG and trxG.

Key Words:

EPIGENETIC OPPOSITES OF PcG AND trxG MAINTAIN THE REPRESSIVE OR ACTIVE STATE OF TARGET GENES