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Molecular architecture of softwood revealed by solid-state NMR
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Terrett, Oliver M., Lyczakowski, Jan J., Yu, Li, Iuga, Dinu, Franks, W. Trent, Brown, Steven P., Dupree, Ray and Dupree, Paul (2019) Molecular architecture of softwood revealed by solid-state NMR. Nature Communications, 10 (1). 4978. doi:10.1038/s41467-019-12979-9 ISSN 2041-1723.
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Official URL: http://doi.org/10.1038/s41467-019-12979-9
Abstract
Economically important softwood from conifers is mainly composed of the polysaccharides cellulose, galactoglucomannan and xylan, and the phenolic polymer, lignin. The interactions between these polymers lead to wood mechanical strength and must be overcome in biorefining. Here, we use 13C multidimensional solid-state NMR to analyse the polymer interactions in never-dried cell walls of the softwood, spruce. In contrast to some earlier softwood cell wall models, most of the xylan binds to cellulose in the two-fold screw conformation. Moreover, galactoglucomannan alters its conformation by intimately binding to the surface of cellulose microfibrils in a semi-crystalline fashion. Some galactoglucomannan and xylan bind to the same cellulose microfibrils, and lignin is associated with both of these cellulose-bound polysaccharides. We propose a model of softwood molecular architecture which explains the origin of the different cellulose environments observed in the NMR experiments. Our model will assist strategies for improving wood usage in a sustainable bioeconomy.
| Item Type: | Journal Article | ||||||||||||||||||||||||||||||
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| Subjects: | H Social Sciences > HD Industries. Land use. Labor Q Science > QD Chemistry Q Science > QP Physiology S Agriculture > SD Forestry |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||||||||||||||||||||||
| SWORD Depositor: | Library Publications Router | ||||||||||||||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Softwood -- Molecular aspects, Nuclear magnetic resonance spectroscopy, Organic solid state chemistry, Conifers -- Molecular aspects | ||||||||||||||||||||||||||||||
| Journal or Publication Title: | Nature Communications | ||||||||||||||||||||||||||||||
| Publisher: | Nature Publishing Group | ||||||||||||||||||||||||||||||
| ISSN: | 2041-1723 | ||||||||||||||||||||||||||||||
| Official Date: | 31 October 2019 | ||||||||||||||||||||||||||||||
| Dates: |
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| Volume: | 10 | ||||||||||||||||||||||||||||||
| Number: | 1 | ||||||||||||||||||||||||||||||
| Article Number: | 4978 | ||||||||||||||||||||||||||||||
| DOI: | 10.1038/s41467-019-12979-9 | ||||||||||||||||||||||||||||||
| Status: | Peer Reviewed | ||||||||||||||||||||||||||||||
| Publication Status: | Published | ||||||||||||||||||||||||||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||||||||||||||||||||||||||
| Date of first compliant deposit: | 9 January 2020 | ||||||||||||||||||||||||||||||
| Date of first compliant Open Access: | 9 January 2020 | ||||||||||||||||||||||||||||||
| RIOXX Funder/Project Grant: |
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