Abstract:
:In this study we were mirroring suggested in vivo phenomena of lignin-hemicellulose complex formation in vitro, by cross-linking Norway spruce (Picea abies) galactoglucomannans, xylans and lignin moieties to high molecular weight complexes by laccase treatment. We were able to observe the oxidation and cross-linking of non-condensed guaiacyl-type phenolic moieties attached to both of the hemicelluloses by (31)P NMR and size-exclusion chromatography. We suggest that hemicelluloses-lignin complexes form covalently linked structural units during the early stages of lignification via radical enzymatic cross-linking catalyzed by laccase. This work shows that the hemicellulose molecules in wood are covalently linked to two or more lignin units thereby making them suited for forming network structures.
journal_name
Phytochemistryjournal_title
Phytochemistryauthors
Oinonen P,Zhang L,Lawoko M,Henriksson Gdoi
10.1016/j.phytochem.2014.10.027subject
Has Abstractpub_date
2015-03-01 00:00:00pages
177-84eissn
0031-9422issn
1873-3700pii
S0031-9422(14)00431-2journal_volume
111pub_type
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