Importance of Water in Maintaining Softwood Secondary Cell Wall Nanostructure.
Authors
Cresswell, Rosalie
Dupree, Ray
Pereira, Caroline S
Publication Date
2021-11-08Journal Title
Biomacromolecules
ISSN
1525-7797
Publisher
American Chemical Society (ACS)
Language
eng
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Cresswell, R., Dupree, R., Brown, S. P., Pereira, C. S., Skaf, M. S., Sorieul, M., Dupree, P., & et al. (2021). Importance of Water in Maintaining Softwood Secondary Cell Wall Nanostructure.. Biomacromolecules https://doi.org/10.1021/acs.biomac.1c00937
Abstract
Water is one of the principal constituents by mass of living plant cell walls. However, its role and interactions with secondary cell wall polysaccharides and the impact of dehydration and subsequent rehydration on the molecular architecture are still to be elucidated. This work combines multidimensional solid-state 13C magic-angle-spinning (MAS) nuclear magnetic resonance (NMR) with molecular dynamics modeling to decipher the role of water in the molecular architecture of softwood secondary cell walls. The proximities between all main polymers, their molecular conformations, and interaction energies are compared in never-dried, oven-dried, and rehydrated states. Water is shown to play a critical role at the hemicellulose-cellulose interface. After significant molecular shrinkage caused by dehydration, the original molecular conformation is not fully recovered after rehydration. The changes include xylan becoming more closely and irreversibly associated with cellulose and some mannan becoming more mobile and changing conformation. These irreversible nanostructural changes provide a basis for explaining and improving the properties of wood-based materials.
Sponsorship
New Zealand Ministry of Business, Innovation and Employment
(MBIE) Endeavour Fund (Contract No. C04X1707, Fibre
Grand Design)
The European Research
Council (ERC Starting Grant 639907 awarded to Józef
Lewandowski) and the University of Warwick funded the
700 MHz Bruker Avance III spectrometer
Funder references
Funda????o de Amparo ?? Pesquisa do Estado de S??o Paulo (2015/25031-1, 2013/08293-7)
Ministry of Business, Innovation and Employment (C04X1707)
European Research Council (639907)
Identifiers
PMC8579401, 34669375
External DOI: https://doi.org/10.1021/acs.biomac.1c00937
This record's URL: https://www.repository.cam.ac.uk/handle/1810/331091
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International
Licence URL: https://creativecommons.org/licenses/by-nc-nd/4.0/
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