AAT1 — Zea mays

Summary

ZM00001EB032230 (ZmAAT1) on maize chromosome 1 encodes a basic amino acid permease with L-lysine, L-glutamate and general amino acid transmembrane transporter activity, belonging to the AA/rel_permease1 family. The gene is associated with brittle endosperm, grain number, grain yield, ear length, plant height, leaf chlorophyll and carotenoid content, anthocyanin and proline content, salt and heat tolerance, germination rate, root length, and oxidative stress response. It has been linked to osmotic stress, abscisic acid response, drought and cold tolerance, senescence, stomatal development, seed germination, hydrogen peroxide accumulation and scavenging, programmed cell death, circadian rhythm, hypersensitive response, leaf amino acid concentration, salicylic acid accumulation, and resistance to pathogens including Pseudomonas syringae and Colletotrichum higginsianum. The protein localises to the plasma membrane, tonoplast, endoplasmic reticulum, mitochondria and nuclear envelope.