DHAR — Pisum sativum

Summary

PsDHAR (PSAT6G237000) encodes a dehydroascorbate reductase, an enzyme with glutathione transferase and copper-binding activities, belonging to the DHAR1/2/3/4 family. In garden pea, this gene is associated with ascorbate metabolism and the ascorbate-glutathione cycle, cellular oxidant detoxification, protein glutathionylation, and the regulation of symbiotic processes. It has been linked to seed longevity, oxidative and drought stress tolerance, salicylic acid accumulation and signaling, and responses to salt, ozone, and hydrogen peroxide. Associations with photosynthetic rate, chlorophyll content, starch and protein content, seed weight, turgor pressure, and stomatal resistance have also been noted. The encoded protein localizes to multiple compartments including the cytosol, chloroplast stroma, mitochondria, apoplast, and nucleus. Studies of related genes in other species link the family to drought and aluminum tolerance and seed viability.