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- Title
Relationship of Lignin Content, Lignin Monomeric Composition and Hemicellulose Composition in the Same Trunk Sought by their Within-Tree Variations in Eucalyptus camaldulensis and E. globulus.
- Authors
Toshihiro Ona; Tetsuya Sonoda; Kazuya Itoh; Masaru Shibata
- Abstract
The relationship of extractives-free (EF) lignin content, lignin monomeric composition as syringyl/guaiacyl (S/G) ratio by thioacidolysis, and neutral sugars constituting hemicellulose by hydrolysis with trifluoroacetic acid was examined. This was performed in the same trunk by their within-tree variations, which mean the investigation with the same genes, in Eucalyptus camaldulensis and E. globulus. As results, each species had a high negative correlation between EF-lignin content and lignin S/G ratio although the difference between species and/or individuals was observed in the trend of within-tree variations of the wood properties. The relationship between EF-lignin content and lignin S/G ratio is considered to be caused from the difference in the fiber morphology from the relationship between lignin and EF-basic density which may relate to the fiber morphology. Furthermore, the relationship between the lignin monomeric composition derived from b-0-4 bonds and the hemicellulose composition is concluded to exist since common trend was observed between two species as higher lignin S/G ratio with the increase in xylan and or with decrease in arabinogalactan (galactan). We also discuss and suggest that the hemicellulose composition can influence on the lignin monomeric composition.
- Publication
Holzforschung: International Journal of the Biology, Chemistry, Physics, & Technology of Wood, 1997, Vol 51, Issue 5, p396
- ISSN
0018-3830
- Publication type
Article