Derived insoluble matter distribution
Cellulose, hemicelluloses and lignin are the major
polymers in the plant cell walls, and any change in or
removal of these components would be expected to
consequently affect enzymatic digestibility. However,
experimental results have been rather inconsistent.
Grohmann et al. and others showed direct relationships
between hemicellulose removal and glucose yields from
cellulose [111,145–150], but other reports do not support
a role for hemicellulose removal in changing cellulose
digestibility [151–154]. Similarly, conflicting conclu-
sions have been reached on the importance of lignin
removal in enhancing cellulose conversion [102,155–157].
All plant cell wall constituents are modified to different
extents by pretreatments, depending on the technolo-
gies and conditions applied, making it challenging to
deduce whether altering cellulose microfibrils, removing
hemicelluloses, modifying or relocating lignin, or other
effects on the substrate are responsible for improving
enzyme effectiveness.
Derived insoluble matter distributionCellulose, hemicelluloses and lignin are the major polymers in the plant cell walls, and any change in or removal of these components would be expected to consequently affect enzymatic digestibility. However, experimental results have been rather inconsistent. Grohmann et al. and others showed direct relationships between hemicellulose removal and glucose yields from cellulose [111,145–150], but other reports do not support a role for hemicellulose removal in changing cellulose digestibility [151–154]. Similarly, conflicting conclu-sions have been reached on the importance of lignin removal in enhancing cellulose conversion [102,155–157]. All plant cell wall constituents are modified to different extents by pretreatments, depending on the technolo-gies and conditions applied, making it challenging to deduce whether altering cellulose microfibrils, removing hemicelluloses, modifying or relocating lignin, or other effects on the substrate are responsible for improving enzyme effectiveness.
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