Covalent interactions between lignin and hemicelluloses in plant secondary cell walls.


Type
Article
Change log
Authors
Terrett, Oliver M 
Abstract

The plant secondary cell wall is a complex structure composed of polysaccharides and lignin, and is a key evolutionary innovation of vascular land plants. Although cell wall composition is well understood, the cross-linking of the different polymers is only now yielding to investigation. Cross-linking between hemicelluloses and lignin occurs via two different mechanisms: incorporation into lignin by radical coupling of ferulate substitutions on xylan in commelinid monocots, and incorporation of hemicellulosic glycosyl residues by re-aromatisation of lignification intermediates. Recent genetic evidence indicates that hemicellulose:lignin cross-linking has a substantial impact on plant cell wall recalcitrance. Engineering plant biomass with modified frequencies of cross-links will have significant impacts on biomass utilisation.

Description
Keywords
Cell Wall, Lignin, Plants, Polysaccharides, Xylans
Journal Title
Curr Opin Biotechnol
Conference Name
Journal ISSN
0958-1669
1879-0429
Volume Title
56
Publisher
Elsevier BV
Sponsorship
Biotechnology and Biological Sciences Research Council (BB/L014130/1)
Biotechnology and Biological Sciences Research Council (BB/M015432/1)
Leverhulme Trust (RP2013-SL-008)
O.M.T was a recipient of an iCASE studentship from the BBSRC and Novozymes (Reference BB/M015432/1). P.D. was supported by the Leverhulme Trust Centre for Natural Material Innovation and the OpenPlant Synthetic Biology Research Centre BB/L014130/1.