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Title: Genotype, development and tissue-derived variation of cell-wall properties in the lignocellulosic energy crop Miscanthus

Journal Article · · Annals of Botany
DOI:https://doi.org/10.1093/aob/mcu054· OSTI ID:1342753
 [1];  [2];  [1];  [2];  [1];  [1]
  1. Aberystwyth Univ., Ceredigion (United Kingdom)
  2. Univ. of Massachusetts, Amherst, MA (United States)

Species and hybrids of the genus Miscanthus contain attributes that make them front-runners among current selections of dedicated bioenergy crops. A key trait for plant biomass conversion to biofuels and biomaterials is cell-wall quality; however, knowledge of cell-wall composition and biology in Miscanthus species is limited. This study presents data on cell-wall compositional changes as a function of development and tissue type across selected genotypes, and considers implications for the development of miscanthus as a sustainable and renewable bioenergy feedstock. Cell-wall biomass was analysed for 25 genotypes, considering different developmental stages and stem vs. leaf compositional variability, by Fourier transform mid-infrared spectroscopy and lignin determination. In addition, a Clostridium phytofermentans bioassay was used to assess cell-wall digestibility and conversion to ethanol. Important cell-wall compositional differences between miscanthus stem and leaf samples were found to be predominantly associated with structural carbohydrates. Lignin content increased as plants matured and was higher in stem tissues. Although stem lignin concentration correlated inversely with ethanol production, no such correlation was observed for leaves. Leaf tissue contributed significantly to total above-ground biomass at all stages, although the extent of this contribution was genotype-dependent. In conclusion, it is hypothesized that divergent carbohydrate compositions and modifications in stem and leaf tissues are major determinants for observed differences in cell-wall quality. The findings indicate that improvement of lignocellulosic feedstocks should encompass tissue-dependent variation as it affects amenability to biological conversion. For gene-trait associations relating to cell-wall quality, the data support the separate examination of leaf and stem composition, as tissue-specific traits may be masked by considering only total above-ground biomass samples, and sample variability could be mostly due to varying tissue contributions to total biomass.

Research Organization:
Univ. of Massachusetts, Amherst, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
SC0006621
OSTI ID:
1342753
Journal Information:
Annals of Botany, Vol. 114, Issue 6; ISSN 0305-7364
Publisher:
Oxford University PressCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 48 works
Citation information provided by
Web of Science

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Transcriptome analysis of genes involved in secondary cell wall biosynthesis in developing internodes of Miscanthus lutarioriparius journal August 2017
Modified expression of ZmMYB167 in Brachypodium distachyon and Zea mays leads to increased cell wall lignin and phenolic content journal June 2019
Nutrient and drought stress: implications for phenology and biomass quality in miscanthus journal August 2018
How cell wall complexity influences saccharification efficiency in Miscanthus sinensis journal April 2015
Genes and gene clusters related to genotype and drought-induced variation in saccharification potential, lignin content and wood anatomical traits in Populus nigra† journal May 2017
Evaluation of Miscanthus sinensis biomass quality as feedstock for conversion into different bioenergy products journal April 2016
Impact of drought stress on growth and quality of miscanthus for biofuel production journal July 2016
Could Miscanthus replace maize as the preferred substrate for anaerobic digestion in the United Kingdom? Future breeding strategies journal January 2017
Stem growth characteristics of high yielding Miscanthus correlate with yield, development and intraspecific competition within plots journal March 2019
Desirable plant cell wall traits for higher-quality miscanthus lignocellulosic biomass journal April 2019
Development of an oligosaccharide library to characterise the structural variation in glucuronoarabinoxylan in the cell walls of vegetative tissues in grasses journal May 2019
Description and Codification of Miscanthus × giganteus Growth Stages for Phenological Assessment journal October 2017
Miscanthus x giganteus Stem Versus Leaf-Derived Lignins Differing in Monolignol Ratio and Linkage journal March 2019
QTL Mapping of Wood FT-IR Chemotypes Shows Promise for Improving Biofuel Potential in Short Rotation Coppice Willow (Salix spp.) journal March 2018
Development of an oligosaccharide library to characterise the structural variation in glucuronoarabinoxylan in the cell walls of vegetative tissues in grasses. text January 2019
The effect of mechanical pre-processing and different drying methodologies on bioethanol production using the brown macroalga Laminaria digitata (Hudson) JV Lamouroux journal January 2017
Genomic index selection provides a pragmatic framework for setting and refining multi-objective breeding targets in Miscanthus journal October 2018
A cell wall reference profile for Miscanthus bioenergy crops highlights compositional and structural variations associated with development and organ origin journal November 2016
Lignins Isolated via Catalyst-free Organosolv Pulping from Miscanthus x giganteus, M. sinensis, M. robustus and M. nagara: A Comparative Study posted_content January 2021
Fourier transform mid infrared spectroscopy applications for monitoring the structural plasticity of plant cell walls journal June 2014
Nitrogen Reserve Pools in Two Miscanthus × giganteus Genotypes under Contrasting N Managements journal September 2017