D18 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.3HG0240140 (symbol HvD18) on barley chromosome 3H encodes a gibberellin 3-beta-dioxygenase (EC 1.14.11.15), a 2-oxoglutarate-dependent dioxygenase of the iron/ascorbate oxidoreductase family. This gene is associated with gibberellin signaling and biosynthesis, seed development, the cell cycle, and responses to red/far-red light, fungal molecules, and gibberellin. It has been linked to plant height, coleoptile length, respiration rate, and vegetative growth. Phenotypic associations include seed dormancy, primary root growth, flowering time, and trichome formation. The gene product localizes to the cytoplasm. Studies of related genes in other species link the family to reduced bioactive GA4 levels, delayed starch degradation, abnormal seed coat development, dwarfism, and GA-dependent germination.