Transcription activator that coordinates abscisic acid (ABA) biosynthesis and signaling-related genes via binding to the specific promoter motif 5'-(A/T)AACCAT-3'. Represses ABA-mediated salt (e.g. NaCl and KCl) stress tolerance. Regulates leaf shape and promotes vegetative growth. Expressed in young seedlings, developing leaves, sepals and trichomes. Induced by salicylic acid (SA) and gibberellic acid (GA) (PubMed:16463103). Triggered by dehydration and salt stress (PubMed:26243618). Increased tolerance to salt stress leading to better seedling survival and enhanced seed germination on NaCl- and KCl-containing medium, due to a reduced sensitivity to and reduced levels of abscisic acid (ABA), as well as a reduced induction of stress-related genes. Altered leaf morphology, both in shape and in size.