CAHDZ12 — Cicer arietinum

Summary

CaHB-7 (CAHDZ12) on chickpea chromosome 7 encodes a homeodomain-leucine zipper (HD-Zip) class I transcription factor with DNA-binding, protein homodimerization, and TBP-class protein binding activity. It localizes to the nucleus and is associated with responses to abscisic acid, water, salinity, osmotic stress, hormones, lipids, and viruses, as well as regulation of transcription, pollen tube growth, endosperm development, and secondary metabolism. The gene has been linked to seed yield, lignin content, endosperm morphology, and auxin sensitivity. Phenotypic associations include drought and water deficit tolerance, salinity tolerance, ABA sensitivity, root and leaf growth, inflorescence stem elongation, cell expansion, endoreduplication, seed germination, biomass, stem lignification, carbon partitioning, sucrose transport, leaf senescence, stomatal conductance, and pathogen resistance. Related genes in other species connect the family to abiotic stress tolerance, water use efficiency, and seed dormancy.