Differences in S/G ratio in natural poplar variants do not predict catalytic depolymerization monomer yields

Anderson, Eric M.; Stone, Michael L.; Katahira, Rui; Reed, Michelle; Muchero, Wellington; Ramirez, Kelsey J.; Beckham, Gregg T.; Román‐Leshkov, Yuriy

doi:10.1038/s41467-019-09986-1

Cited by 165 publications

(166 citation statements)

References 61 publications

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“…[40][41][42][43][44][45] the low correlation between β-O-4 proportion and the relative S residue content in poplar natural variants. [46,47] Altogether, our results showed that different residues are subjected to a specific proportion of β-O-4 linkages within the lignin polymer. Positional analyses of G CHOH , S CHOH and G CHO residues moreover revealed a clear decoupling between the proportion of terminal and internal residues depending on the mutation.…”

supporting

confidence: 51%

Importance of Lignin Coniferaldehyde Residues for Plant Properties and Sustainable Uses

et al. 2020

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Increases in coniferaldehyde content, a minor lignin residue, significantly improves the sustainable use of plant biomass for feed, pulping, and biorefinery without affecting plant growth and yields. Herein, different analytical methods are compared and validated to distinguish coniferaldehyde from other lignin residues. It is shown that specific genetic pathways regulate amount, linkage, and position of coniferaldehyde within the lignin polymer for each cell type. This specific cellular regulation offers new possibilities for designing plant lignin for novel and targeted industrial uses.

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supporting

confidence: 51%

Importance of Lignin Coniferaldehyde Residues for Plant Properties and Sustainable Uses

et al. 2020

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“…G units can be additionally interlinked at their C-5 atom via β-5 or 5-5 bond [14,44]. This might mean that the distribution and linking of the monomers in Sida lignocellulose is less uniform than in the other two plant biomasses.…”

Section: Compositional Analysis Of Raw Materials and Organocat Productsmentioning

confidence: 99%

Multiscale analysis of lignocellulose recalcitrance towards OrganoCat pretreatment and fractionation

Weidener

Dama

Dietrich

et al. 2020

Biotechnol Biofuels

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Background: Biomass recalcitrance towards pretreatment and further processing can be related to the compositional and structural features of the biomass. However, the exact role and relative importance to those structural attributes has still to be further evaluated. Herein, ten different types of biomass currently considered to be important raw materials for biorefineries were chosen to be processed by the recently developed, acid-catalyzed OrganoCat pretreatment to produce cellulose-enriched pulp, sugars, and lignin with different amounts and qualities. Using wet chemistry analysis and NMR spectroscopy, the generic factors of lignocellulose recalcitrance towards OrganoCat were determined. Results: The different materials were processed applying different conditions (e.g., type of acid catalyst and temperature), and fractions with different qualities were obtained. Raw materials and products were characterized in terms of their compositional and structural features. For the first time, generic correlation coefficients were calculated between the measured chemical and structural features and the different OrganoCat product yields and qualities. Especially lignin-related factors displayed a detrimental role for enzymatic pulp hydrolysis, as well as sugar and lignin yield exhibiting inverse correlation coefficients. Hemicellulose appeared to have less impact, not being as detrimental as lignin factors, but xylan-O-acetylation was inversely correlated with product yield and qualities. Conclusion: These results illustrate the role of generic features of lignocellulosic recalcitrance towards acidic pretreatments and fractionation, exemplified in the OrganoCat strategy. Discriminating between types of lignocellulosic biomass and highlighting important compositional variables, the improved understanding of how these parameters affect OrganoCat products will ameliorate bioeconomic concepts from agricultural production to chemical products. Herein, a methodological approach is proposed.

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“…The environment is suffering from climate change, worsened by over-exploitation of resources thus increasing global greenhouse gas emission (Anderson et al, 2019;Hassan et al, 2019). Sustainable and environmentally friendly energy based on renewable resources are required in order to meet the world's future energy needs.…”

Section: Introductionmentioning

confidence: 99%

Lignocellulosic Biomass: Understanding Recalcitrance and Predicting Hydrolysis

2019

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Lignocellulosic biomass (LB) is an abundant and renewable resource from plants mainly composed of polysaccharides (cellulose and hemicelluloses) and an aromatic polymer (lignin). LB has a high potential as an alternative to fossil resources to produce second-generation biofuels and biosourced chemicals and materials without compromising global food security. One of the major limitations to LB valorisation is its recalcitrance to enzymatic hydrolysis caused by the heterogeneous multi-scale structure of plant cell walls. Factors affecting LB recalcitrance are strongly interconnected and difficult to dissociate. They can be divided into structural factors (cellulose specific surface area, cellulose crystallinity, degree of polymerization, pore size and volume) and chemical factors (composition and content in lignin, hemicelluloses, acetyl groups). Goal of this review is to propose an up-to-date survey of the relative impact of chemical and structural factors on biomass recalcitrance and of the most advanced techniques to evaluate these factors. Also, recent spectral and water-related measurements accurately predicting hydrolysis are presented. Overall, combination of relevant factors and specific measurements gathering simultaneously structural and chemical information should help to develop robust and efficient LB conversion processes into bioproducts.

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Differences in S/G ratio in natural poplar variants do not predict catalytic depolymerization monomer yields

Cited by 165 publications

References 61 publications

Importance of Lignin Coniferaldehyde Residues for Plant Properties and Sustainable Uses

Importance of Lignin Coniferaldehyde Residues for Plant Properties and Sustainable Uses

Multiscale analysis of lignocellulose recalcitrance towards OrganoCat pretreatment and fractionation

Lignocellulosic Biomass: Understanding Recalcitrance and Predicting Hydrolysis

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