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Learning from nature: High-Impact Aroma Chemistry
By: David Brassington, Oxford Chemicals, Ltd; and Robert Edwards, University of Durham
Posted: August 23, 2006, from the September 2006 issue of P&F magazine.
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- September 2006 issue, pg 30
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Plants as Biofactories for Flavors and Fragrances
Plants already are used extensively as sources of natural materials in the F&F industry, with essential oils being an excellent example. Unlike synthetic sources, naturals contain multiple components and can be unpredictable in terms of quality and quantity. As the continuing increase in oil prices makes plant-based renewables increasingly attractive as alternative feedstocks for biofuel and bulk chemical production, it is timely for the F&F industry to review recent progress in natural product biology and chemistry, and to evaluate future opportunities for harnessing biodiversity for their own applications.
One of the primary objectives in using plant-based feedstocks in any industrial application is to standardize the composition of the starting material as much as possible, ensuring its suitability for downstream processing. For example, in order to derive oil-based products for large-scale extraction, it is desirable to control the chain length and degrees of saturation of plant lipids. This can be achieved by genetic engineering technology. Alternatively, genes encoding specific quality traits can be identified by searching within the naturally diverse genetic pool from which modern crops are derived. Once identified, these useful trait genes can be crossed back into high-yielding modern crops using classical breeding techniques for large-scale production of the new feedstocks. Although such an approach has been applied for polysaccharide and oil-based products, the technology remains underutilized by the F&F industry.
In addition to the benefits of moving to technologies based on renewables, the use of naturals rather than synthetics has obvious advantages in terms of consumer acceptance and also may help to develop new marketing opportunities through scientifically defined health benefits.
Other topics covered: Allium aroma chemistry, biological control of Allium HIAC production, potential for extending Allium-related natural HIAC diversity, health benefits of Allium HIACs, plant biotechnology and F&F production.
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