ASD — Cucumis sativus

Summary

CsASD (CSA_7G414480) on cucumber chromosome 7 encodes a short-chain dehydrogenase/reductase (SDR) family protein with NAD(P)-binding domain, exhibiting multiple oxidoreductase activities including carveol, isopiperitenol, xanthoxin, and secoisolariciresinol dehydrogenase activities, as well as aldo-keto reductase and isomerase functions. The gene is associated with abscisic acid (ABA) biosynthesis and its regulation, monoterpenoid and lignan anabolism, chlorophyll breakdown, and responses to fructose, UV, and anaerobic conditions. It localizes to the cytosol, nucleus, mitochondria, and stress granules. Phenotypic associations link CsASD to ABA deficiency, sugar sensitivity, drought tolerance, seed dormancy and germination, stomatal responses, herbivore resistance, and resistance to Botrytis cinerea. Trait associations include photosynthetic rate, quantum yield, transpiration rate, stomatal resistance, and soluble protein content. Studies of related genes in other species further connect the gene family to gibberellin biosynthesis, pathogen resistance, and abiotic stress responses.