DHAR — Capsicum annuum

Summary

CaDHAR (T459_02942) on pepper chromosome 1 encodes a dehydroascorbate reductase (EC 2.5.1.18) with glutathione transferase activity, copper binding, and glutathione binding functions. The protein belongs to the DHAR1/2/3/4 family and localises to multiple compartments including the chloroplast envelope, stroma, apoplast, vacuole, mitochondria, cytosol, and plasmalemma. CaDHAR is associated with ascorbate metabolism and the ascorbate-glutathione cycle, cellular oxidant detoxification, response to hydrogen peroxide, ozone, jasmonic acid, zinc, and symbiotic fungi, as well as positive regulation of salicylic acid-mediated signalling, fruit ripening, seed longevity acquisition, chlorophyll fluorescence, and NO storage. The gene has been linked to traits including net photosynthetic rate, plant height, stem diameter, root volume and length, respiration rate, and salt tolerance. Related genes in other species are associated with drought, chilling, photooxidative, and abiotic stress tolerance, ascorbate and glutathione redox state, and salicylic acid accumulation.