HB-3 — Oryza sativa Japonica

Summary

OS07G0684900 (HB-3/WOX11) on rice chromosome 7 encodes a homeodomain-containing transcription factor with transcription coactivator activity and DNA-binding functions. This gene is associated with crown root development and initiation, root architecture, and adventitious root formation in rice. It is linked to auxin and cytokinin responses, drought resistance, biomass accumulation, tiller development, and potassium transport. Associations also include regulation of nitrogen utilization, gibberellic acid homeostasis, seed dormancy, regeneration, and meristem development. The gene is connected to traits such as crown root number, tiller angle, plant size, seed set, male sterility, flowering time, root length, and leaf senescence. It localizes to both the nucleus and cytoplasm. Studies of related genes in other species link the family to embryonic patterning, somatic embryogenesis, and shoot meristem development.