GA5 — Solanum tuberosum

Summary

StGA5 (GA5) on potato chromosome 6 encodes a gibberellin 20-oxidase, a 2-oxoglutarate-dependent dioxygenase. The enzyme is associated with gibberellin signaling and biosynthesis, and with the regulation of growth, leaf development, and fruit ripening. StGA5 has been connected to pre-harvest sprouting, response to flooding, red or far-red light, and molecules of fungal origin, as well as defense response to oomycetes. The gene is linked to stem length and elongation, plant height, biomass, seed germination, flowering time, fruit set, and parthenocarpy. It is also associated with ethylene sensitivity, salt stress tolerance, wind tolerance, drought rhizogenesis, and water loss. Studies of related genes in other species link the family to gibberellin metabolism, stem and root growth, fruit development, and salt tolerance.