CAT1 — Cucumis sativus

Summary

CsCAT1 (CSA_4G658590) on cucumber chromosome 4 encodes a catalase enzyme (EC 1.11.1.6) with a haem-binding site and belongs to the catalase clade 1/3 family. The gene is associated with hydrogen peroxide metabolism, oxygen metabolism, and cellular nitric oxide homeostasis, and its product localises to the peroxisomal lumen. CsCAT1 is associated with numerous agronomic traits including seedling height, leaf weight, stem fresh weight, root volume, harvest index, relative chlorophyll content, cell membrane stability, drought sensitivity, and seedling vigor. It is also linked to programmed cell death, abiotic stress tolerance, reactive oxygen species tolerance, chilling sensitivity, and photosynthetic efficiency. Studies of related genes in other species link it to oxidative stress tolerance, hypersensitive cell death, and organ size regulation.