LDH — Lactuca sativa

Summary

LsLDH, encoded by gene LSAT_V11C600299770 on lettuce chromosome 6, is a member of the L-lactate/malate dehydrogenase family and possesses both L-lactate dehydrogenase (NAD+) and NAD-L-malate dehydrogenase activities. In lettuce, this gene is associated with pyruvate breakdown, lactate and malate metabolism, the TCA cycle, glyoxylate cycle, detoxification, embryogenesis, nitric oxide storage, and responses to salt and abscisic acid. It is linked to respiration rate, phosphorus uptake, chlorophyll content, salt tolerance, and oxygen deficit response. The protein localises to the cytosol, cytoplasm, and plasmalemma. Studies of related genes in other species connect the LDH family to traits such as root growth, fruit size, plant height, stomatal resistance, and hypoxia tolerance, though these associations are not yet established in lettuce.