2017
DOI: 10.1186/s13068-017-0870-5
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Identification of developmental stage and anatomical fraction contributions to cell wall recalcitrance in switchgrass

Abstract: BackgroundHeterogeneity within herbaceous biomass can present important challenges for processing feedstocks to cellulosic biofuels. Alterations to cell wall composition and organization during plant growth represent major contributions to heterogeneity within a single species or cultivar. To address this challenge, the focus of this study was to characterize the relationship between composition and properties of the plant cell wall and cell wall response to deconstruction by NaOH pretreatment and enzymatic hy… Show more

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Cited by 28 publications
(20 citation statements)
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“…Despite this, we cannot presume that lignin is the only recalcitrance-enhancing agent in stem biomass. Indeed, in switchgrass, although lignin content is generally negatively correlated with saccharification, it is not the sole contributor to recalcitrance across diverse anatomical features [87].
Fig.
…”
Section: Resultsmentioning
confidence: 99%
“…Despite this, we cannot presume that lignin is the only recalcitrance-enhancing agent in stem biomass. Indeed, in switchgrass, although lignin content is generally negatively correlated with saccharification, it is not the sole contributor to recalcitrance across diverse anatomical features [87].
Fig.
…”
Section: Resultsmentioning
confidence: 99%
“…Together with the polysaccharides cellulose and hemicellulose, lignin is one of the principal structural polymers of the cell walls of terrestrial plants and can comprise up to 30% of the mass of a plant on a dry basis. The composition and properties of the lignin in a plant prior to processing are a complex function of its source derived from plant taxonomy and genotype, development stage, environment, and tissue type [25]. Gymnosperm lignins are comprised primarily of monomers derived from coniferyl alcohol, corresponding to the guaiacyl or “G” monomer upon incorporation into the lignin polymer, while angiosperm lignins are comprised primarily of monomers derived from coniferyl and sinapyl alcohols (syringyl or “S” monomer) (Figure 1) [26].…”
Section: Impact Of Source Processing History and Functionalizatimentioning
confidence: 99%
“…Consistently, expression of secondary cell wall-related genes has been shown to be higher in stems (Zhao and Bartley, 2014;Mazarei et al, 2018;Rao et al, 2019). Noteworthy, other than inflorescence, the tissues of high PvFPGS1 expression in switchgrass are all significantly lignified (Crowe et al, 2017).…”
Section: Discussionmentioning
confidence: 70%