CSD1 — Arabidopsis thaliana

Summary

AT1G08830 (CSD1) in Arabidopsis thaliana encodes a copper/zinc superoxide dismutase (EC 1.15.1.1), an enzyme that detoxifies superoxide radicals and is central to reactive oxygen species homeostasis. The gene is associated with salt tolerance, superoxide detoxification, and responses to oxidative stress, photooxidative stress, ozone, paraquat, UV-B, copper, and high light. It has been linked to traits including seed weight, seed size, germination rate, root length, photosynthetic rate, respiration rate, bacterial blight disease resistance, and pollen fertility. The encoded protein localizes to the cytosol, nucleus, plasmodesma, and extracellular regions, and is connected to sulfate assimilation, heat dissipation, and chitin and chitosan binding. Studies of related genes in other species link the family to drought, chilling, and heat stress tolerance, as well as to yield-related traits such as harvest index and seedling vigor.