ACO4 — Zea mays

Summary

ZmACO4 (ZM00001EB418090) on maize chromosome 10 encodes an ACC oxidase (EC 1.14.17.4) with 2-oxoglutarate dioxygenase activity, vitamin C binding and metal binding, placing it in the plant 2OG-oxidoreductase family. The gene is associated with ethylene biosynthesis, induction of programmed cell death, aerenchyma formation, and responses to flooding and water. It has been linked to traits including grain yield, grain number, ear length, seed weight, plant height, stem elongation, chlorophyll a content, transpiration rate, water use efficiency, stomatal resistance, salinity and drought tolerance, heterosis, seed dormancy, and cytokinin content. Additional associations include leaf abscission, hyponastic leaf movement, hydrogen peroxide metabolic process, the SAM cycle, polyamine anabolism, and phosphorus utilization. The protein localizes to the cytoplasm. Studies of related genes in other species connect the family to spikelet number and abiotic stress resistance.