DHAR — Pisum sativum

Summary

PsDHAR (PSAT3G101720) on garden pea chromosome 3LG5 encodes a dehydroascorbate reductase, an enzyme with glutathione transferase and copper-binding activities. The gene is associated with ascorbate metabolism, the ascorbate-glutathione cycle, protein glutathionylation, cellular oxidant detoxification, and responses to hydrogen peroxide, ozone, salt, and zinc. It is linked to regulation of symbiotic processes, salicylic acid-mediated signaling, seed longevity acquisition, chlorophyll fluorescence, and cellular respiration. The encoded protein localizes to the apoplast, chloroplast stroma, mitochondria, cytosol, nucleus, and plant-type vacuole. Associations with agronomic traits include seed weight, starch and protein content, photosynthetic rate, stomatal resistance, turgor pressure, and salt tolerance. Phenotypic connections include oxidative and drought stress tolerance, seed longevity, and antioxidative responses. Studies of related genes in other species link the family to drought tolerance and aluminum tolerance.