GA5 — Solanum tuberosum

Summary

StGA5 (GA5) on potato chromosome 3 encodes a gibberellin 20-oxidase, a 2-oxoglutarate-dependent dioxygenase. The enzyme is associated with gibberellin signaling and biosynthesis, and with responses to flooding, red or far-red light, short-day flowering, and molecules of fungal origin. It is linked to defense against oomycetes, ethylene and flavonoid anabolism, fruit ripening, leaf and flower development, and regulation of growth. The gene has been connected to stem length and elongation, plant height, biomass, leaf size, root growth, seed germination, flowering time, fruit set and growth, parthenocarpy, fertility, salt stress tolerance, wind tolerance, drought rhizogenesis, graft union formation, and thermomorphogenic growth. Studies of related genes in other species link the family to gibberellin metabolism, stem and hypocotyl elongation, fruit development, trichome formation, and salt tolerance.