CAT1 — Triticum aestivum

Summary

TaCAT1 (TRAESCS4B02G325800) on wheat chromosome 4B encodes a catalase (EC 1.11.1.6) with haem-binding and S-nitrosylase activity, belonging to the catalase clade 1/3 family. The gene is associated with hydrogen peroxide metabolism, cellular nitric oxide homeostasis, and the NO-cGMP signaling pathway, and localises to the peroxisomal lumen. TaCAT1 is linked to numerous agronomic traits including grain nitrogen content, spike weight, flag leaf area, canopy temperature depression, stay-green characteristics, chlorophyll content, abscisic acid levels, and biological yield. It is also associated with programmed cell death, oxidative stress tolerance, drought tolerance, photosynthetic efficiency, and water use efficiency. Studies of related genes in other species link the catalase family to cold and osmotic stress tolerance, disease resistance, and peroxisomal function.