Lignification and lignin topochemistry — an ultrastructural view

This review discuses the ultrastructural aspects of cell wall lignification and lignin topochemistry. Lignification results from the enzyme mediated polymerization of monolignols initiated by unknown factors (initiation sites) located at the corners of cells and in the middle lamella. Lignification...

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Bibliographic Details
Published in:Phytochemistry 2001-07, Vol.57 (6), p.859-873
Main Author: Donaldson, Lloyd A.
Format: Article
Language:English
Subjects:
Angiosperms
Biological and medical sciences
Cell Wall - physiology
Cell Wall - ultrastructure
Cycadopsida - physiology
Cycadopsida - ultrastructure
Fundamental and applied biological sciences. Psychology
Guaiacyl
Gymnosperms
Lignification
Lignin - biosynthesis
Lignin - chemistry
Lignin - ultrastructure
Lignin distribution
Lignin topochemistry
Magnoliopsida - physiology
Magnoliopsida - ultrastructure
Metabolism
Metabolism. Physicochemical requirements
Microscopy, Electron
Monolignol
p-Hydroxyphenyl
Plant physiology and development
Reaction wood
Syringyl
Ultrastructure
Wood
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Summary:This review discuses the ultrastructural aspects of cell wall lignification and lignin topochemistry. Lignification results from the enzyme mediated polymerization of monolignols initiated by unknown factors (initiation sites) located at the corners of cells and in the middle lamella. Lignification results in the filling of pores within the carbohydrate matrix following a sequence from the outer regions of the wall towards the lumen. The amount and chemical characteristics of lignin vary across the cell wall, with the presence of reaction wood, and among cell types.
ISSN:0031-9422
1873-3700
DOI:10.1016/S0031-9422(01)00049-8