Significance of Lignin S/G Ratio in Biomass Recalcitrance of Populus trichocarpa Variants for Bioethanol Production
- BioEnergy Science Center &, Center for BioEnergy Innovation, Biosciences Division, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, Tennessee 37831, United States; UT−ORNL Joint Institute for Biological Science, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, Tennessee 37831, United States
- BioEnergy Science Center &, Center for BioEnergy Innovation, Biosciences Division, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, Tennessee 37831, United States
- School of Chemistry and Biochemistry, Georgia Institute of Technology, 901 Atlantic Drive, Atlanta, Georgia 30332, United States
- National Renewable Energy Laboratory, U.S. Department of Energy, 15013 Denver West Parkway, Golden, Colorado 80401, United States
- BioEnergy Science Center &, Center for BioEnergy Innovation, Biosciences Division, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, Tennessee 37831, United States; UT−ORNL Joint Institute for Biological Science, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, Tennessee 37831, United States; Department of Chemical and Biomolecular Engineering &, Center for Renewable Carbon, Department of Forestry, Wildlife, and Fisheries, University of Tennessee, 1512 Middle Drive, Knoxville, Tennessee 37996, United States
Lignin S/G ratio has been investigated as an important factor in biomass recalcitrance to bioethanol production. Because of the complexity and variety of biomass, recalcitrance was also reportedly influenced by several other factors, such as total lignin content, degree of cellulose polymerization, etc. In addition, the effect of S/G ratio on biomass conversion is not uniform across plant species. Herein, 11 Populus trichocarpa natural variants grown under the same conditions with similar total lignin content were selected to minimize the effects of other factors. The lignin S/G ratio of the selected P. trichocarpa natural variants showed negative correlations with p-hydroxybenzoate (PB) and ..beta..-5 linkage contents, while it had positive ones with ..beta..-O-4 linkage, lignin molecular weight, and ethanol production. This study showed the importance of lignin S/G ratio as an independent recalcitrance factor that may aid future energy crop engineering and biomass conversion strategies.
- Research Organization:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- DOE Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1431420
- Report Number(s):
- NREL/JA-5100-71261
- Journal Information:
- ACS Sustainable Chemistry & Engineering, Vol. 6, Issue 2; ISSN 2168-0485
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
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Insights of biomass recalcitrance in natural Populus trichocarpa variants for biomass conversion
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