CAT1 — Triticum aestivum

Summary

TaCAT1 (TRAESCS7A02G549800) on wheat chromosome 7A 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 cellular hydrogen peroxide and nitric oxide homeostasis, oxidant detoxification, and responses to superoxide, heat, and xenobiotic stimuli. It has been linked to peroxisomal localisation and protein-peroxisome targeting. TaCAT1 is associated with numerous agronomic traits including grain filling period, seed yield, biomass yield, photosynthetic rate, leaf chlorosis, disease tolerance, low temperature stress response, and salt tolerance. Associations also extend to chloroplast development, stomatal closure, auxin sensitivity, nitrate uptake, and reproductive period. Studies of related genes in other species link the family to stress tolerance, disease resistance, programmed cell death, and peroxisomal function.