The invention discloses maize bZIP transcriptional factor, the genes encoding these factors and the use thereof. Those transcriptional factors ABP2, ABP4 and ABP9, respectively, are the proteins having the amino acid sequences shown by sequence 2, 4, and 6 in the sequence listing, or the proteins derived from thereof which are produced by substitution, deletion or addition of at least one or more amino acid residues of the amino acid sequence shown by sequence 2, 4 and 6 in the sequence listing, having the same activity as the proteins shown by sequence 2, 4 and 6 in the sequence listing. The genes ABP2, ABP4 and ABP9 encoding these said facters respectively, are the DNA sequences having an identity of more than 90% to the sequences shown by SEQ ID No. 1, 3 and 5 in the sequence listing and the encoded proteins having such same functions. The genes of the invention have important significance for breeding plant varieties with enhanced tolerance to abiotic stresses and for improving plant tolerance to abiotic stresses.