PlantRegMap/PlantTFDB v5.0
Plant Transcription Factor Database
Handroanthus impetiginosus
GRF Family
Species TF ID Description
PIM98026.1GRF family protein
PIN00045.1GRF family protein
PIN00615.1GRF family protein
PIN02681.1GRF family protein
PIN03953.1GRF family protein
PIN13036.1GRF family protein
PIN16375.1GRF family protein
PIN16819.1GRF family protein
PIN18287.1GRF family protein
PIN21109.1GRF family protein
PIN21243.1GRF family protein
PIN22923.1GRF family protein
PIN23777.1GRF family protein
PIN25894.1GRF family protein
PIN26205.1GRF family protein
GRF Family Introduction

Previously, we identified a novel rice gene, GROWTH-REGULATING FACTOR1 (OsGRF1), which encodes a putative transcription factor that appears to play a regulatory role in stem elongation. We now describe the GRF gene family of Arabidopsis thaliana (AtGRF), which comprises nine members. The deduced AtGRF proteins contain the same characteristic regions--the QLQ (Gln, Leu, Gln) and WRC (Trp, Arg, Cys) domains--as do OsGRF1 and related proteins in rice, as well as features indicating a function in transcriptional regulation. Most of the AtGRF genes are strongly expressed in actively growing and developing tissues, such as shoot tips, flower buds, and roots, but weakly in mature stem and leaf tissues. Overexpression of AtGRF1 and AtGRF2 resulted in larger leaves and cotyledons, as well as in delayed bolting of the inflorescence stem when compared to wild-type plants. In contrast, triple insertional null mutants of AtGRF1-AtGRF3 had smaller leaves and cotyledons, whereas single mutants displayed no changes in phenotype and double mutants displayed only minor ones. The alteration of leaf growth in overexpressors and triple mutants was based on an increase or decrease in cell size, respectively. These results indicate that AtGRF proteins play a role in the regulation of cell expansion in leaf and cotyledon tissues.

Kim JH, Choi D, Kende H.
The AtGRF family of putative transcription factors is involved in leaf and cotyledon growth in Arabidopsis.
Plant J. 2003 Oct;36(1):94-104.
PMID: 12974814