Abstract
Floral scents play important ecological roles because they attract pollinators and seed-dispersers. Historically, humans have used plant volatiles, including floral scents, as food additives, cosmetic products, and medicines. Floral scent formation and emissions are sometimes considerably affected by environmental and climatic conditions. Both enzymes and genes involved in floral scent biosynthesis have been consistently identified, and have provided insights into the potential of metabolic engineering of floral scents. This review summarizes recent studies on various aspects of floral scent biosynthesis and emission, including biosynthetic enzymes and genetic engineering. The findings ultimately show that the metabolic pathways of floral volatiles may be regulated by a more complex system than previously thought.
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