ATM4 — Lactuca sativa

Summary

LsATM4, also known as ATM4, is a garden lettuce (Lactuca sativa) gene on chromosome 9 encoding a protein with a Myb domain and SANT/Myb domain, and has DNA binding, transcription factor activity, and protein dimerization activity. It is associated with the regulation of flavonoid, proanthocyanidin, phlobaphene, and glucosinolate biosynthetic processes, as well as pigment accumulation in tissues, trichome morphogenesis and spacing, and defense responses to insects. The gene has been linked to numerous traits including leaf trichome density, seed protein content, shoot branching, root epidermal cell length, phosphorus response, iron concentration, brassinosteroid content, and responses to osmotic stress, salt stress, UV-B light, and aphids. Studies of related genes in other species connect the family to cuticle development, suberin synthesis, and drought response.