DHAR — Lactuca sativa

Summary

LsDHAR, encoded by gene LSAT_V11C800396060 on chromosome 8 of garden lettuce (Lactuca sativa), is a dehydroascorbate reductase with glutathione transferase and copper-binding activities, belonging to the DHAR1/2/3/4 family. It is associated with ascorbate metabolism, the ascorbate-glutathione cycle, cellular oxidant detoxification, photoprotection, and responses to hydrogen peroxide, ozone, jasmonic acid, and symbiotic fungi. The gene has been linked to seed longevity, oxidative and drought stress tolerance, chilling injury tolerance, and regulation of the salicylic acid signaling pathway. Associations also include traits such as photosynthetic rate, transpiration rate, root and shoot fresh and dry weights, nitrate and sugar content, and stomatal resistance. The protein localizes to multiple cellular compartments including the chloroplast envelope, stroma, apoplast, mitochondria, cytosol, and vacuole.