FL1 — Lactuca sativa

Summary

LsFL1 on chromosome 4 of garden lettuce encodes a MADS-box transcription factor with DNA-binding, transcription coactivator, and protein dimerization activities, and is also associated with SUMO transferase and 3'-5' exoribonuclease functions. The gene is associated with the regulation of flowering time, particularly through short-day photoperiodism and vernalization response, as well as floral organ development, seed growth, nitrate assimilation, and salicylic acid metabolism. Associations with agronomic traits include days to flowering, photoperiod-sensitive flowering time, seed protein content, water use efficiency, leaf size, anthocyanin content, and responses to high temperature, salt, aluminum, and copper stress. Studies of related genes in other species link the family to flowering transition, vernalization requirement, plant height, biomass yield, and circadian clock regulation.