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Title: Significance of Lignin S/G Ratio in Biomass Recalcitrance of Populus trichocarpa Variants for Bioethanol Production

Journal Article · · ACS Sustainable Chemistry & Engineering
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  1. 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
  2. BioEnergy Science Center &, Center for BioEnergy Innovation, Biosciences Division, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, Tennessee 37831, United States
  3. School of Chemistry and Biochemistry, Georgia Institute of Technology, 901 Atlantic Drive, Atlanta, Georgia 30332, United States
  4. National Renewable Energy Laboratory, U.S. Department of Energy, 15013 Denver West Parkway, Golden, Colorado 80401, United States
  5. 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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Cited By (7)

Fractionation of non-timber wood from Atlantic mixed forest into high-value lignocellulosic materials text January 2020
Fractionation of non-timber wood from Atlantic mixed forest into high-value lignocellulosic materials journal March 2020
Lignocellulosic Biomass: Understanding Recalcitrance and Predicting Hydrolysis journal December 2019
Use of the lignocellulose-degrading bacterium Caldicellulosiruptor bescii to assess recalcitrance and conversion of wild-type and transgenic poplar journal March 2020
Cell wall compositional and vascular traits of hybrid poplar wood in micropropagated plants and plants propagated from root cuttings journal May 2019
Fractionation of non-timber wood from Atlantic mixed forest into high-value lignocellulosic materials text January 2020
Lignin Engineering in Forest Trees journal July 2019

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