Abstract
Carotenoids are isoprenoid pigmented compounds that are present in representatives from practically all eukaryotic and prokaryotic taxa. In plants, carotenoids are synthesized and normally sequestered in plastids as lipophilic C 40 constituents. However, they are also subjected to oxidative remodeling initiated by specific carotenoid cleavage dioxygenases. Primary products resulting from these reactions undergo modifications involving oxido-reduction, dehydratation rearrangement, and glycosylation. This review focuses on only a few of these derivatives for which the enzymes and genes involved have been characterized. The compartmentation of this metabolism and its significance have also been considered.
Published Version
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