Exploiting Natural Variation to Uncover an Alkene Biosynthetic Enzyme in Poplar [electronic resource].
- Washington, D.C. : United States. Dept. of Energy. Office of Science, 2017.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
- Physical Description:
- pages 2,000-2,015 : digital, PDF file
- Additional Creators:
- University of Wisconsin--Madison
United States. Department of Energy. Office of Science
United States. Department of Energy. Office of Scientific and Technical Information
- Alkenes are linear hydrocarbons with one or more double bonds. Despite their potential as biofuels and precursors for specialty chemicals, the underlying biochemistry and genetics of alkene biosynthesis in plants remain elusive. Here, we report on a screen of natural accessions of poplar (Populus trichocarpa), revealing that the leaf cuticular waxes are predominantly composed of alkanes and alkenes. Interestingly, the accumulation of alkenes increases with leaf development, is limited to the abaxial side of the leaf, and is impaired in a few accessions. Among other genes, a b-ketoacyl CoA synthase gene (PotriKCS1) was downregulated in leaves from non-alkene-producing accessions. We demonstrated biochemically that PotriKCS1 elongates monounsaturated fatty acids and is responsible for the recruitment of unsaturated substrates to the cuticular wax. Moreover, we found significant associations between the presence of alkenes and tree growth and resistance to leaf spot. These findings highlight the crucial role of cuticular waxes as the first point of contact with the environment, and they provide a foundation for engineering long-chain monounsaturated oils in other species.
- Published through SciTech Connect.
Plant Cell 29 8 ISSN 1040-4651 AM
Eliana Gonzales-Vigil; Charles A. Hefer; Michelle E. von Loessl; Jonathan La Mantia; Shawn D. Mansfield.
- Funding Information:
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