Covalent interactions between lignin and hemicelluloses in plant secondary cell walls.
Current opinion in biotechnology
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Terrett, O., & Dupree, P. (2019). Covalent interactions between lignin and hemicelluloses in plant secondary cell walls.. Current opinion in biotechnology, 56 97-104. https://doi.org/10.1016/j.copbio.2018.10.010
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.
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.
Leverhulme Trust (RP2013-SL-008)
External DOI: https://doi.org/10.1016/j.copbio.2018.10.010
This record's URL: https://www.repository.cam.ac.uk/handle/1810/286515