SO — Daucus carota subsp. sativus

Summary

DCAR_021791 (symbol SO, DcSO) on carrot chromosome 6 encodes a molybdenum cofactor-binding oxidoreductase with sulfite oxidase, nitrate reductase and cytochrome-b5 reductase activities, and also binds FAD, heme and molybdenum ions. The gene is associated with nitrate assimilation, sulfur metabolism, chlorophyll metabolism, nitric oxide anabolism, mRNA transcription, secretion, and responses to sulfur dioxide, nitrite and light stimulus. Its product localises to mitochondria, the cytosol and organelle membranes. DcSO is also linked to virus resistance. Studies of related genes in other species connect the family to sulfite oxidation, sulfite homeostasis and detoxification, selenite oxidation, pipecolate metabolism, and traits including leaf necrosis, fruit weight, plant height and drought tolerance.