Transcriptional activator that mediates abscisic acid (ABA) signaling (PubMed:18931143, PubMed:19947981, PubMed:27424498, PubMed:27325665). Can regulate the expression of a wide spectrum of stress-related genes in response to abiotic stresses through an ABA-dependent regulation pathway. Confers ABA-dependent drought and salinity tolerance (PubMed:18931143, PubMed:27325665). Binds specifically to the ABA-responsive elements (ABRE) in the promoter of target genes to mediate stress-responsive ABA signaling (PubMed:27325665, PubMed:27424498). Highly expressed in leaves. Induced by abscisic acid (ABA) (PubMed:18315698, PubMed:18931143). Induced by drought, salt and osmotic stresses (PubMed:18931143). Slight decrease in plant height and increased sensitivity to drought and salt stresses. Belongs to the bZIP family. ABI5 subfamily.