ARF1 — Zea mays

Summary

ZmARF1 (ARF1) on maize chromosome 4 encodes a protein with ARF, AUX/IAA, PB1-like, and B3 DNA-binding domains, and has sequence-specific DNA binding, transcription cis-regulatory region binding, DNA binding transcription factor activity, transcription corepressor activity, protein heterodimerization activity, protein homodimerization activity, identical protein binding, protein binding, protein kinase activity, and protein serine/threonine kinase activity. It is associated with ear length, crown root number, root volume, stem diameter, leaf angle, spikelet fertility, inflorescence size and development, flower and floral organ morphology, the vegetative-to-reproductive phase transition, nitrogen utilization, hormone anabolism, stem cell proliferation, intercellular transport, nucleocytoplasmic transport, and intracellular signaling. It localizes to the nucleus, cytoplasm, plasmalemma, vesicle, and cell cortex. Studies of related genes in other species connect the family to seed mass, organ size, drought tolerance, leaf senescence, root growth, auxin sensitivity, and resistance to Sclerotinia sclerotiorum and Fusarium oxysporum.