DHAR — Lactuca sativa

Summary

LsDHAR, encoded by the garden lettuce gene LSAT_V11C200075100 on chromosome 2, is a dehydroascorbate reductase with glutathione transferase and copper-binding activities, belonging to the DHAR1/2/3/4 family. It is associated with the ascorbate-glutathione cycle, ascorbate metabolism, protein glutathionylation, photoprotection, cellular oxidant detoxification, and responses to hydrogen peroxide, ozone, jasmonic acid, zinc, and symbiotic fungi. The gene is linked to positive regulation of salicylic acid-mediated signaling and acquisition of seed longevity. Associations with agronomic traits include photosynthetic rate, transpiration rate, stomatal resistance, respiration rate, root and shoot fresh and dry weight, nitrate content, and sugar content. Phenotypic associations include oxidative stress tolerance, drought stress tolerance, chilling injury tolerance, seed longevity, and mutualistic interaction with Piriformospora indica. The protein localizes to the chloroplast envelope, stroma, apoplast, vacuole, plastid, mitochondria, cytosol, and plasmalemma.