BET9 — Lactuca sativa

Summary

LsBET9 (BET9) on chromosome 4 of garden lettuce encodes a bromodomain-containing protein with histone acetylase activity, histone binding, SUMO transferase activity, and DNA-binding transcription factor activity. It is associated with the regulation of nitrate assimilation, salicylic acid metabolism, systemic acquired resistance, antiviral responses, and shoot regeneration. The gene has been linked to traits including seed protein content, seed dormancy, flowering time, anthocyanin content, root hair length, lateral root length, root thickness, whole plant size, chloroplast development, and responses to nitrate, phosphorus, aluminum, copper, auxin, high and low temperature, oxidative stress, and disease tolerance. Studies of related genes in other species connect the family to cell cycle regulation, immune response, and gene transcription, and to sugar, auxin, and abscisic acid responses.