GA5 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.3HG0306160 (symbol GA5, HvGA5) on barley chromosome 3H encodes a gibberellin 20-oxidase (GA20ox3), a 2-oxoglutarate-dependent dioxygenase with iron/ascorbate oxidoreductase and DIOX_N domains. The enzyme possesses gibberellin 20-oxidase, flavanone 3-dioxygenase, and dioxygenase activities, and binds vitamin C and metals. The gene is associated with gibberellin signaling and response, regulation of growth, leaf and flower development, cell cycle, defense responses to oomycetes and fungal molecules, responses to flooding, light stimuli, and short-day flowering, coumarin and flavonoid anabolism, and polar cell growth. It localizes to the cytoplasm. The gene is associated with plant height, grain weight, harvest index, starch and protein content, anthesis time, respiration rate, biomass, tiller number, grain yield, wind and salt stress tolerance, seed germination, and root, stem, and leaf growth. Related genes in other species are associated with gibberellin metabolism, stem growth, seed dormancy, yield, and plant stature.