文章基本信息

标题：Direct evidence for α ether linkage between lignin and carbohydrates in wood cell walls
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作者：Hiroshi Nishimura ; Akihiro Kamiya ; Takashi Nagata 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2018
卷号：8
期号：1
页码：6538
DOI：10.1038/s41598-018-24328-9
语种：English
出版社：Springer Nature
摘要：Cross-linking between lignin and polysaccharide in plant cell-wall determines physical, chemical, and biological features of lignocellulosic biomass. Since Erdmann's first report in 1866, numerous studies have suggested the presence of a bond between hemicelluloses and lignin; however, no clear evidence for this interaction has been reported. We describe the first direct proof of covalent bonding between plant cell-wall polysaccharides and lignin. Nuclear magnetic resonance spectroscopy was used to observe the long-range correlations through an α-ether bond between lignin and the primary hydroxyl group of a mannose residue in glucomannan. Complete signal assignment of the cognate structural units was also achieved. Thus, we identified lignin-carbohydrate bonds by complete connectivity analysis from the phenylpropane unit to the carbohydrate moiety.