Comparison between 10,000-year old and contemporary spruce lignin

Wood from white spruce Picea glauca that had been preserved by rapid burial in lake sediments 10,000 years ago, was investigated and compared to a contemporary reference white spruce wood. The 10,000-year old sample appeared to have an intact primary cell wall and middle lamella, whereas the carbohy...

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Bibliographic Details
Published in:Wood science and technology 2009-02, Vol.43 (1-2), p.23-41
Main Authors: Christiernin, Maria, Notley, Shannon M, Zhang, Liming, Nilsson, Thomas, Henriksson, Gunnar
Format: Article
Language:English
Subjects:
Biomedical and Life Sciences
Carbohydrates
Cell walls
Cellulosa- och pappersteknik
Cellulose and paper engineering
Ceramics
Chemical engineering
Chemical process and manufacturing engineering
Composites
Gel permeation chromatography
Glass
Kemisk process- och produktionsteknik
Kemiteknik
Lake sediments
Lamella
Life Sciences
Lignin
Machines
Manufacturing
Monomers
Natural Materials
NMR
Nuclear magnetic resonance
Oligomers
Original
Polymers
Processes
Sediments
TECHNOLOGY
TEKNIKVETENSKAP
Trävetenskap
Walls (structural partitions)
Wood
Wood Science
Wood Science & Technology
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Summary:Wood from white spruce Picea glauca that had been preserved by rapid burial in lake sediments 10,000 years ago, was investigated and compared to a contemporary reference white spruce wood. The 10,000-year old sample appeared to have an intact primary cell wall and middle lamella, whereas the carbohydrate monomer distribution, and microscopic images showed that the secondary wall was at least partially removed, indicating that this structure had been selectively attacked by bacteria. The Klason lignin amount in the aged spruce was found to be 60%. The relative lignin monomer content in the aged spruce was 9% lower than that of the reference wood, showing that there were fewer β-O-4' linkages in the aged sample. This finding was supported by SEC analysis of the thioacidolysed samples as a larger proportion of lignin oligomers were observed in the aged spruce than in the reference material. This indicates a somewhat greater number of condensed bonds in the aged spruce than in the reference spruce sample. Quantitative ¹³C NMR analysis and HSQC techniques applied on milled wood lignins (MWL) revealed no significant structural differences between the aged spruce and the reference.
ISSN:0043-7719
1432-5225
1432-5225
DOI:10.1007/s00226-008-0222-5