DHAR — Cucumis sativus

Summary

CSA_5G179760 (DHAR) in cucumber (Cucumis sativus) on chromosome 5 encodes a dehydroascorbate reductase with glutathione transferase activity, belonging to the DHAR1/2/3/4 and glutathione S-transferase families. The enzyme is associated with the ascorbate-glutathione cycle, ascorbate metabolism, cellular oxidant detoxification, and responses to hydrogen peroxide and salicylic acid signaling. It is linked to traits including leaf chlorophyll content, net photosynthetic rate, quantum yield, water use efficiency, plant height, root volume, shoot dry weight, proline content, and hydrogen peroxide content. Phenotypic associations include drought stress tolerance, chilling injury tolerance, oxidative stress tolerance, seed longevity, and mutualistic interaction with Piriformospora indica. The protein localizes to chloroplasts, mitochondria, cytosol, apoplast, and plasma membrane. Studies of related genes in other species connect the family to ascorbic acid content, salt and drought tolerance, and fruit quality traits.