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United States Department of Agriculture

Agricultural Research Service

Title: Dehydrogenation Polymer-Cell Wall Complexes As a Model for Lignified Grass Walls

item Grabber, John
item Ralph, John
item Hatfield, Ronald
item Quideau, Stephane - UNIV OF WISCONSIN-MADISON

Submitted to: American Chemical Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: March 28, 1996
Publication Date: N/A

Technical Abstract: p-Hydroxycinnamyl alcohols were efficiently polymerized into primary walls from Zea mays cell suspensions by H2O2 and wall-bound peroxidases to produce dehydrogenation polymer-cell wall (DHP-CW) complexes. The structure and distribution of synthetic lignin in DHP-CW complexes were similar to natural lignins formed in grass cell walls. This system was used to elucidate how ferulate-polysaccharide esters act as nucleation sites for lignification, cross-link cell wall polymers, and restrict enzymatic degradation of cell walls. In addition, various types of lignin precursors and lignification conditions were used in forming complexes to assess how lignin composition and structure affect the enzymatic degradation of cell walls. Results from these studies will also be presented.

Last Modified: 4/19/2015
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