FL1 — Lactuca sativa

Summary

LsFL1, on lettuce chromosome 4, encodes a MADS-box transcription factor with a K-box domain. It is associated with sequence-specific DNA binding, transcription coactivator activity, and protein dimerization. The gene is linked to the regulation of flowering time, including both short-day and long-day photoperiodism, as well as the downregulation of the vernalization response. It has been connected to floral meristem identity, floral whorl development, and inflorescence development. Associations also include traits such as days to flowering, photoperiod-sensitive flowering time, flower and leaf morphology, seed protein content, water use efficiency, and responses to abiotic stresses like high temperature, salt, and aluminum. Additionally, it is linked to nitrate assimilation, salicylic acid metabolism, and systemic acquired resistance. Studies of related genes in other species connect the family to flowering transition, vernalization requirement, and thermosensitive flowering.