DHAR — Capsicum annuum

Summary

CaDHAR (T459_27756) on pepper chromosome 11 encodes a dehydroascorbate reductase (EC 2.5.1.18) with glutathione transferase and copper-binding activities, belonging to the DHAR1/2/3/4 family. The enzyme is associated with ascorbate metabolism and the ascorbate-glutathione cycle, cellular oxidant detoxification, and responses to hydrogen peroxide, ozone, jasmonic acid, and zinc. It has been linked to fruit ripening, seed longevity acquisition, chlorophyll fluorescence, and positive regulation of salicylic acid-mediated signaling. Localization evidence connects the protein to the chloroplast envelope, stroma, apoplast, vacuole, mitochondria, cytosol, and plastid. Associations with agronomic traits include plant height, stem diameter, root volume and length, net photosynthetic and respiration rates, and salt tolerance. Studies of related genes in other species link the family to drought tolerance, seed longevity, and ascorbate redox state.