CAT2 — Brassica juncea

Summary

BJUA03G05290S (CAT2) on chromosome A03 of Indian mustard (Brassica juncea) encodes a catalase (EC 1.11.1.6), a haem-binding enzyme. The gene is associated with cellular responses to hydrogen peroxide and superoxide, cell redox homeostasis, and regulation of hydrogen peroxide metabolism. It is linked to abiotic stress tolerance, including oxidative stress, drought, cold, and salt tolerance, as well as biotic stress responses such as systemic acquired resistance and response to oomycetes. Associations with agronomic traits include biomass yield, seed yield, water use efficiency, nitrate uptake, leaf chlorosis, and seedling growth. The product localises to the peroxisomal lumen and has also been connected to aerenchyma formation, photoperiodism, and regulation of programmed cell death. Related genes in other species are linked to hypersensitive cell death, organ size, and calcium signalling.