ACC4 — Lactuca sativa

Summary

LsACC4, encoded by the garden lettuce gene ACC4 on chromosome 9, is a 1-aminocyclopropane-1-carboxylate synthase with transaminase and pyridoxal phosphate binding activities. It is associated with the regulation and negative regulation of ethylene biosynthetic processes, as well as responses to organophosphorus, potassium ion, and nitrogen starvation. The gene has been linked to numerous traits including yield, leaf length, root hair length, lateral root number, root mass density, photosynthetic rate, respiration rate, flowering time, fruit ripening, anthocyanin content, and responses to bacterial disease, low temperature stress, and arsenic. It is also connected to phenotypes such as root growth, root hair growth, lateral root formation, ethylene production, seed mucilage defects, and cell wall biosynthesis. Related genes in other species are linked to responses to ethylene, wounding, darkness, and iron deficiency.