The Influence of Hot Water and Calcium Chloride on the Changes in Cell Wall Composition and the Activities of Cell Wall Hydrolases during Storage in Agaricus bisporus

2015 ◽  
Vol 40 (2) ◽  
pp. 220-226 ◽  
Author(s):  
Y. Karakurt ◽  
D. Toka
Keyword(s):  
Cell Wall ◽  
Calcium Chloride ◽  
Agaricus Bisporus ◽  
Cell Wall Composition ◽  
Hot Water ◽  
Cell Wall Hydrolases

scholarly journals Internode structure and cell wall composition in maturing tillers of switchgrass (Panicum virgatum. L)

2007 ◽  
Vol 98 (16) ◽  
pp. 2985-2992 ◽  
Author(s):  
Gautam Sarath ◽  
Lisa M. Baird ◽  
Kenneth P. Vogel ◽  
Robert B. Mitchell
Keyword(s):  
Cell Wall ◽  
Panicum Virgatum ◽  
Cell Wall Composition ◽  
Panicum Virgatum L

scholarly journals Evaluating polymer interplay after hot water pretreatment to investigate maize stem internode recalcitrance

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Amandine Leroy ◽  
Xavier Falourd ◽  
Loïc Foucat ◽  
Valérie Méchin ◽  
Fabienne Guillon ◽  
...  
Keyword(s):  
Cell Wall ◽  
Negative Impact ◽  
Lignin Content ◽  
Structural Features ◽  
Hot Water ◽  
Condensed State ◽  
Structural Factors ◽  
Water Pretreatment ◽  
Hot Water Pretreatment ◽  
The Impact

Abstract Background Biomass recalcitrance is governed by various molecular and structural factors but the interplay between these multiscale factors remains unclear. In this study, hot water pretreatment (HWP) was applied to maize stem internodes to highlight the impact of the ultrastructure of the polymers and their interactions on the accessibility and recalcitrance of the lignocellulosic biomass. The impact of HWP was analysed at different scales, from the polymer ultrastructure or water mobility to the cell wall organisation by combining complementary compositional, spectral and NMR analyses. Results HWP increased the kinetics and yield of saccharification. Chemical characterisation showed that HWP altered cell wall composition with a loss of hemicelluloses (up to 45% in the 40-min HWP) and of ferulic acid cross-linking associated with lignin enrichment. The lignin structure was also altered (up to 35% reduction in β–O–4 bonds), associated with slight depolymerisation/repolymerisation depending on the length of treatment. The increase in $${T}_{1\rho }^{H}$$ T 1 ρ H , $${T}_{HH}$$ T HH and specific surface area (SSA) showed that the cellulose environment was looser after pretreatment. These changes were linked to the increased accessibility of more constrained water to the cellulose in the 5–15 nm pore size range. Conclusion The loss of hemicelluloses and changes in polymer structural features caused by HWP led to reorganisation of the lignocellulose matrix. These modifications increased the SSA and redistributed the water thereby increasing the accessibility of cellulases and enhancing hydrolysis. Interestingly, lignin content did not have a negative impact on enzymatic hydrolysis but a higher lignin condensed state appeared to promote saccharification. The environment and organisation of lignin is thus more important than its concentration in explaining cellulose accessibility. Elucidating the interactions between polymers is the key to understanding LB recalcitrance and to identifying the best severity conditions to optimise HWP in sustainable biorefineries.

CO2 enrichment leads to altered cell wall composition in plants of Pfaffia glomerata (Spreng.) Pedersen (Amaranthaceae)

2021 ◽  
Author(s):  
Eliza Louback ◽  
Diego Silva Batista ◽  
Tiago Augusto Rodrigues Pereira ◽  
Talita Cristina Mamedes-Rodrigues ◽  
Tatiane Dulcineia Silva ◽  
...  
Keyword(s):  
Cell Wall ◽  
Co2 Enrichment ◽  
Cell Wall Composition ◽  
Pfaffia Glomerata ◽  
Altered Cell

Maize Stover and Cob Cell Wall Composition and Ethanol Potential as Affected by Nitrogen Fertilization

2015 ◽  
Vol 8 (3) ◽  
pp. 1352-1361 ◽  
Author(s):  
Aaron J. Sindelar ◽  
Craig C. Sheaffer ◽  
John A. Lamb ◽  
Hans-Joachim G. Jung ◽  
Carl J. Rosen
Keyword(s):  
Cell Wall ◽  
Nitrogen Fertilization ◽  
Cell Wall Composition ◽  
Maize Stover

Changes in cell wall composition associated with maturation in the gymnosperm Araucaria angustifolia

2006 ◽  
Vol 38 (3-5) ◽  
pp. 180-190 ◽  
Author(s):  
Renato Bochicchio ◽  
Carmen L.O. Petkowicz ◽  
Iedo Alquini ◽  
Ana P. Busato ◽  
Fany Reicher
Keyword(s):  
Cell Wall ◽  
Cell Wall Composition ◽  
Araucaria Angustifolia

Cell-wall composition and viomycin resistance in Rhizobium meliloti

1972 ◽  
Vol 18 (7) ◽  
pp. 1168-1170 ◽  
Author(s):  
C. R. MacKenzie ◽  
D. C. Jordan
Keyword(s):  
Cell Wall ◽  
Cell Surface ◽  
Rhizobium Meliloti ◽  
Cell Wall Composition ◽  
Surface Layers ◽  
Mechanism Of Resistance ◽  
Resistant Cells

Mutation to viomycin-resistance in Rhizobium meliloti R21 resulted in an accumulation of phosphatidylcholine and phosphatidylethanolamine in the cell wall. Resistance to viomycin decreased when the excess lipid was removed by EDTA or when its synthesis was prevented by growth of normally resistant cells at 40 °C. Microelectrophoretic data showed binding of viomycin to the cell surface and it is proposed that the mechanism of resistance to viomycin is an immobilization of the antibiotic in the surface layers of the cell as a result of combination with phospholipid.

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