DHAR — Cucumis sativus

Summary

CsDHAR (CSA_3G285550) in cucumber encodes a dehydroascorbate reductase (EC 1.8.5.1) with glutathione transferase activity (EC 2.5.1.18), belonging to the DHAR1/2/3/4 and glutathione S-transferase families. The enzyme is associated with the ascorbate-glutathione cycle, ascorbate metabolism, protein glutathionylation, cellular oxidant detoxification, and responses to hydrogen peroxide, ozone, jasmonic acid, zinc, and symbiotic fungi. It is linked to positive regulation of salicylic acid-mediated signaling, chlorophyll fluorescence, adventitious root development, regeneration, and seed longevity acquisition. The protein localizes to multiple compartments including the chloroplast envelope and stroma, mitochondria, cytosol, apoplast, and plasmalemma. Associations with agronomic traits include leaf chlorophyll content, photosynthetic rate, respiration rate, plant height, stem diameter, and protein content. Phenotypic connections include drought stress tolerance, chilling injury tolerance, oxidative stress tolerance, and mutualistic interaction with Piriformospora indica.