Transcriptional repression of GIF1 by the KIX-PPD-MYC repressor complex controls seed size in Arabidopsis

Abstract

Seed size is an important determinant of plant yield. Here, Liu et al. show that a KIX-PPD repressor complex and MYC transcription factors interact with the G-box motif in the promoter of GRF-INTERACTING FACTOR 1 to regulate seed size by influencing cell proliferation and elongation in the integument.