GI — Solanum tuberosum

Summary

StGI (PGSC0003DMG400018791) on potato chromosome 12 encodes a GIGANTEA protein, a nuclear-localised protein with DNA-binding capacity. The gene is associated with the regulation of circadian rhythm and photoperiodic flowering, particularly under long-day conditions. It is also linked to starch and carbohydrate metabolism, flavonoid and anthocyanin biosynthesis, and stress responses. Associations extend to cell differentiation and flower development. StGI has been connected to anthocyanin content and salt tolerance, the latter via hydrogen peroxide-mediated pathways. Studies of related GIGANTEA family members in other species link the family to plant height and salt tolerance.