LDH — Cucumis sativus

Summary

CsLDH (CSA_5G161930) on cucumber chromosome 5 encodes an L-lactate dehydrogenase (EC 1.1.1.27) with NAD+ activity, belonging to the lactate/malate dehydrogenase family. The gene is associated with anaerobic respiration, ethanol fermentation, pyruvate breakdown, lactate metabolism, and the TCA cycle, as well as responses to abscisic acid, cell death, embryogenesis, and seed germination. It has been linked to root fresh weight, root number, lateral root number, and root length, along with respiration rate and oxygen deficit response. Localisation evidence places the product in the cytosol, cytoplasm, and plasmalemma. Studies of related genes in other species connect the family to hypoxia tolerance, fruit size, plant height, chlorophyll content, and sugar accumulation, though these associations are not yet established in cucumber.