Function
Transcription coactivator that plays a role in the regulation of meristematic function in leaves, stems and inflorescences (PubMed:29051769, PubMed:29567670). May regulate leaf size, length of stem internodes, and seed size by promoting cell expansion (PubMed:29051769) (Probable). Transcription coactivator that plays a role in the regulation of grain size (PubMed:27107174, PubMed:29051769, PubMed:29567670). Component of a network formed by the microRNA396 (miRNA396), the GRFs and their interacting factors (GIFs) acting in the regulation of meristem function, at least partially through the control of cell proliferation (Probable). Component of the miRNA396c-GRF4-GIF1 regulatory module that plays an important role in grain size determination (PubMed:27107174).