FL1 — Lactuca sativa

Summary

LsFL1, located on chromosome 4 of garden lettuce (Lactuca sativa), encodes a protein with a K-box domain and is associated with sequence-specific DNA binding, transcription coactivator activity, and protein dimerization. It is linked to the regulation of flowering time, particularly through short-day and long-day photoperiodism, as well as the downregulation of the vernalization response. LsFL1 has been connected to floral meristem identity, floral whorl development, and inflorescence morphology. Associations with agronomic traits include days to flowering, seed protein content, water use efficiency, leaf size, anthocyanin content, and responses to high temperature, salt stress, and aluminum. The gene is also linked to stomatal development, trichome formation, and pathogen resistance. Studies of related genes in other species connect the family to flowering transition, vernalization sensitivity, and plant growth.