CRISPR/Cas9 editing of p-COUMAROYL-CoA:MONOLIGNOL TRANSFERASE 1 in maize alters phenolic metabolism, lignin structure, and lignin-first biomass processing
Journal Article
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· Trends in Biotechnology
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- Ghent University (Belgium); VIB Center for Plant Systems Biology, Ghent (Belgium)
- University of Wisconsin-Madison, WI (United States)
- KU Leuven–University of Leuven (Belgium)
- University of Antwerp (Belgium)
- Ghent University (Belgium); VIB Center for Plant Systems Biology, Ghent (Belgium); VIB Metabolomics Core, Ghent (Belgium)
Valorization of lignocellulosic biomass for sustainable production of high-value chemicals is challenged by the complexity of lignin, a phenolic biopolymer. Beyond the classical lignin monomers derived from p-coumaryl, coniferyl, and sinapyl alcohol, grass lignins incorporate substantial amounts of monolignol p-coumarates that are produced by p-COUMAROYL-CoA:MONOLIGNOL TRANSFERASE (PMT). Here, the CRISPR/Cas9-mediated mutation of ZmPMT1 in maize enabled the design of biomass depleted in p-coumaroylated lignin and enriched in guaiacyl lignin. Lignin-first biorefining of stem biomass from zmpmt1 mutants by reductive catalytic fractionation (RCF) generated a lignin oil depleted in carboxylates and enriched in guaiacyl-derived alcohols, which are desirable substrates for bio-based polyurethane synthesis. Furthermore, the reported lignin engineering in maize is a promising strategy for designing a dual-purpose crop, providing both food and feed, along with a renewable feedstock for the production of plant-based chemicals.
- Research Organization:
- Great Lakes Bioenergy Research Center (GLBRC), Madison, WI (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- Grant/Contract Number:
- SC0018409
- OSTI ID:
- 2539881
- Journal Information:
- Trends in Biotechnology, Journal Name: Trends in Biotechnology Journal Issue: 5 Vol. 43; ISSN 0167-7799
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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