DHAR — Pisum sativum

Summary

PsDHAR (PSAT3G101640) on chromosome 3LG5 of garden pea encodes a dehydroascorbate reductase, an enzyme with dehydroascorbate reductase, glutathione transferase, and copper-binding activities. It is associated with ascorbate metabolism, the ascorbate-glutathione cycle, cellular oxidant detoxification, and protein glutathionylation. The gene has been linked to seed longevity, oxidative and drought stress tolerance, and regulation of the salicylic acid-mediated signaling pathway. Associations also include traits such as seed weight, starch and protein content, photosynthetic rate, chlorophyll content, stomatal resistance, and turgor pressure. The product localizes to multiple cellular compartments including the chloroplast stroma, mitochondria, cytosol, nucleus, and apoplast. Studies of related genes in other species link the family to drought tolerance, aluminum tolerance, and seed viability.