Probable transcription regulator that functions in the development of the carpel margin meristem similarly to SEUSS (SEU). In association with SEU, supports organ development from meristematic regions by facilitating auxin response and thus organ initiation, and by sustaining meristematic potential through the maintenance of PHABULOSA expression (PubMed:20007451). DNA-binding adapter subunit of the SEU-SLK1 transcriptional corepressor of abiotic stress (e.g. salt and osmotic stress) response genes (PubMed:24564815). Forms corepressor complexes with LUH; LUH is the transcription repressor subunit and SLK1 the specific DNA-binding adapters. Expressed in young flower meristems, ovules and the carpel margin meristem. No visible phenotype under normal growth conditions, but the double mutants seu and slk1 are short in stature, sterile and display strong disruptions of floral development and high frequency of female gametophyte disruption (PubMed:20007451). Enhanced tolerance to salt and osmotic stress conditions (PubMed:24564815). Belongs to the adn1/SEU family.