Transcription factor involved in the regulation of salt stress response. Functions as a negative transcriptional regulator of salt stress acclimation response by regulating cation homeostasis (PubMed:18703123, PubMed:19248824). Regulates negatively the expression of genes contributing to ion and osmotic homeostasis during salt stress, such as the Na(+) transporter HKT1, the Na(+)/H(+) antiporter SOS1, the aquaporin PIP2-1 and the glutamine synthetase GLN1-3. In addition, targets genes with functions in plant growth and development, such as argonaute 4 (AGO4) and cyclophilin 19 (CYP19) (PubMed:19248824). Homodimer. Targeted to the nucleus in salt stress conditions. A number of isoforms are produced. According to EST sequences. Expressed in young leaves and cauline leaves. Induced by salt stress (PubMed:18703123, PubMed:19248824). Induced by osmotic stress (PubMed:19248824). Plants silencing BZIP24 show enhanced tolerance to salt stress (PubMed:18703123, PubMed:19248824). Enhanced salt stress tolerance in silencing plants is characterized by enhanced root and leaves development and reduced sodium accumulation in plants (PubMed:19248824).