Transcription factor involved in salt stress response. Confers tolerance to salt stress (PubMed:22575450). Involved in distinct cellular processes in response to osmotic stress, including control of primary metabolism and negative regulation of short-term transcriptional responses to osmotic stress (PubMed:19211694). Can activate the steps necessary for aliphatic suberin synthesis and deposition of cell wall-associated suberin-like lamellae. Involved in the production of aliphatic suberin under abiotic stress conditions (PubMed:25060192). Interacts with MPK6. Induced by salt stress (PubMed:19211694, PubMed:25060192). Induced by osmotic stress (PubMed:19211694). Induced by abscisic acid (PubMed:25060192). Phosphorylated at SER-251 by MPK6 in response to salt stress. Phosphorylation is required for its function in salt stress tolerance.