A review of xylan and lignin biosynthesis: foundation for studying Arabidopsis irregular xylem mutants with pleiotropic phenotypes.

Abstract excerpt

Plant cells are surrounded by a carbohydrate-rich extracellular matrix known as the cell wall. Primary cell walls are laid down around dividing and elongating cells and consist largely of the polysaccharides cellulose, hemicelluloses, and pectin along with approximately 10% protein. Specific cells such as xylem vessels and fibers lay down a secondary wall rich in cellulose, hemicellulose, and lignin, with lesser...

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