Transcription factor involved in the up-regulation of several stress-inducible genes. Acts as a transcriptional activator by interacting with MED25 and NAC proteins. Involved in increased drought tolerance. Homo- and heterodimer with other ZFHD proteins. Interacts with HIPP20, HIPP21, HIPP22, HIPP23, HIPP24, HIPP26, HIPP27, HIPP30 and MED25 (via ACID domain). Interacts with NAC019, NAC055 and NAC072 (via NAC binding domain). Binds to ZHD1, ZHD2, ZHD3, ZHD4, ZHD5, ZHD6, ZHD7, ZHD8, ZHD9, ZHD12, ZHD13 and ZHD14. Expressed in roots, inflorescences, open flowers and seeds. Detected in stems and seedlings. Up-regulated by abscisic acid and by drought and salt stress. Not induced by cold. The C-terminus contains the DNA-binding domain (156-218) while the N-terminus contains the transcriptional activation domain (8-82). The homeodomain differs form the typical one by having namely 4 instead of 3 extra amino acids inserted in the loop between helix 1 and helix 2. No visible phenotype. Increased sensitivity to salt stress.