DHAR — Brassica napus

Summary

BnDHAR (DARMORV10_C08P19510.1) on chromosome C08 of oilseed rape (Brassica napus) encodes a dehydroascorbate reductase with glutathione transferase activity and copper binding capacity, belonging to the DHAR1/2/3/4 and glutathione S-transferase families. The gene is associated with the ascorbate-glutathione cycle, protein glutathionylation, cellular oxidant detoxification, and responses to hydrogen peroxide, ozone, jasmonic acid, zinc, and symbiotic fungi. It has been linked to leaf relative water content, net photosynthetic rate, proline content, stomatal resistance, and salt tolerance. Phenotypic associations include seed longevity, drought and abiotic stress tolerance, salicylic acid accumulation, glutathione and ascorbate redox state, and photooxidative stress tolerance. The protein localizes to the apoplast, chloroplast stroma, mitochondria, cytosol, nucleus, and plant-type vacuole. Studies of related genes in other species link the family to drought tolerance and aluminum tolerance.