NDLI: Characterization and enzymatic hydrolysis of wood from transgenic Pinus taeda engineered with syringyl lignin or reduced lignin content

Content Provider	Springer Nature Link
Author	Edmunds, Charles W. Peralta, Perry Kelley, Stephen S. Chiang, Vincent L. Sharma Shivappa, Ratna R. Davis, Mark F. Harman Ware, Anne E. Sykes, Robert W. Gjersing, Erica Cunningham, Michael W. Rottmann, William Miller, Zachary D. Peszlen, Ilona
Copyright Year	2017
Abstract	Softwood is an abundant resource; however, currently its utilization for bioconversion to obtain platform sugars is limited. Pinus taeda trees which were genetically modified to either produce S lignin or to decrease lignin content were characterized with a suite of analytic techniques. Syringyl lignin was visualized in the secondary xylem of one genetic line with Mäule staining. Solid-state nuclear magnetic resonance identified the S lignin units were coupled into the lignin through β-O-4 linkages, and thioacidolysis measured approximately 13% S lignin content in the same sample. Reductions of the lignin of as much as 33% were observed in the transgenics. To better understand how these modifications affect bioconversion, their amenability to hot water and dilute acid pretreatments and enzymatic hydrolysis was evaluated. Lignin reductions resulted in 1.9–3.2-fold increases in glucose release compared to the control. However, no apparent benefit was observed by S lignin incorporation at the concentrations reported in this study. These results highlight the potential for softwood cell wall properties to be improved for bioenergy/biochemical applications.
Starting Page	1901
Ending Page	1914
Page Count	14
File Format	PDF
ISSN	09690239
Journal	Cellulose
Volume Number	24
Issue Number	4
e-ISSN	1572882X
Language	English
Publisher	Springer Netherlands
Publisher Date	2017-02-22
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Softwood Lignin modification Lignocellulose Pyrolysis-molecular beam mass spectroscopy Solid-state NMR Bioorganic Chemistry Physical Chemistry Organic Chemistry Polymer Sciences Ceramics, Glass, Composites, Natural Materials Sustainable Development
Content Type	Text
Resource Type	Article
Subject	Polymers and Plastics

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