A cell wall reference profile for Miscanthus bioenergy crops highlights compositional and structural variations associated with development and organ origin

Authors Organisations
Type Article
Original languageEnglish
Pages (from-to)1710-1725
Number of pages16
JournalNew Phytologist
Volume213
Issue number4
Early online date15 Nov 2016
DOI
Publication statusPublished - 06 Feb 2017
Links
Permanent link
Show download statistics
View graph of relations
Citation formats

Abstract

Miscanthus spp. are promising lignocellulosic energy crops, but cell wall recalcitrance to deconstruction still hinders their widespread use as bioenergy and biomaterial feedstocks. Identification of cell wall characteristics desirable for biorefining applications is crucial for lignocellulosic biomass improvement. However, the task of scoring biomass quality is often complicated by the lack of a reference for a given feedstock.

A multidimensional cell wall analysis was performed to generate a reference profile for leaf and stem biomass from several miscanthus genotypes harvested at three developmentally distinct time points. A comprehensive suite of 155 monoclonal antibodies was used to monitor changes in distribution, structure and extractability of noncellulosic cell wall matrix glycans.

Glycan microarrays complemented with immunohistochemistry elucidated the nature of compositional variation, and in situ distribution of carbohydrate epitopes. Key observations demonstrated that there are crucial differences in miscanthus cell wall glycomes, which may impact biomass amenability to deconstruction.

For the first time, variations in miscanthus cell wall glycan components were comprehensively characterized across different harvests, organs and genotypes, to generate a representative reference profile for miscanthus cell wall biomass. Ultimately, this portrait of the miscanthus cell wall will help to steer breeding and genetic engineering strategies for the development of superior energy crops.

Keywords

  • BIOENERGY, BIOMASS, CARBOHYDRATE, Cell Wall, GLYCAN, Lignocellulose, Miscanthus, recalcitrance, biomass, bioenergy, carbohydrate, glycan, miscanthus, cell wall, lignocellulose, Crops, Agricultural/growth & development, Plant Leaves/metabolism, Glycomics, Poaceae/growth & development, Biomass, Epitopes/metabolism, Acetylation, Principal Component Analysis, Monosaccharides/metabolism, Plant Development, Biofuels, Plant Stems/metabolism, Polysaccharides/metabolism, Organogenesis, Cell Wall/metabolism

Documents