Tension wood structure and morphology conducive for better enzymatic digestion

Biotechnology for Biofuels
Daisuke SawadaSai Venkatesh Pingali

Abstract

Tension wood is a type of reaction wood in response to bending or leaning stem as a corrective growth process. Tension wood is formed by both natural and man-made processes. Most attractively, tension wood contains higher glucan content and undergoes higher enzymatic conversion to fermentable sugars. Here, we have employed structural techniques, small-angle neutron scattering (SANS) and wide-angle X-ray diffraction (WAXD) to elucidate structural and morphological aspects of tension wood conducive to higher sugar yields. Small-angle neutron scattering data exhibited a tri-modal distribution of the fibril cross-sectional dimension. The smallest size, 22 Å observed in all samples concurred with the WAXD results of the control and opposite side samples. This smallest and the most abundant occurring size was interpreted as the cellulose elementary microfibril diameter. The intermediate size of 45 Å, which is most pronounced in the tension side sample and consistent with WAXD results for tension side sample, indicates association of neighboring elementary microfibrils to form larger crystallite bundles. The largest size 61 Å observed by SANS was however not observed by WAXD and therefore associated to mesopores. Structure and morphol...Continue Reading

References

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Citations

Sep 20, 2018·Scientific Reports·James D KubickiDaniel Cosgrove
Mar 2, 2019·Annual Review of Plant Biology·Urs FischerRishikesh P Bhalerao
Apr 19, 2019·Journal of Applied Crystallography·Paavo A PenttiläRalf Schweins
Nov 9, 2018·Frontiers in Plant Science·Evgeniy DonevEwa J Mellerowicz
Apr 2, 2021·Plant Physiology·Baoguang LiuJack P Wang

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Methods Mentioned

BETA
X-ray
small-angle
SANS

Software Mentioned

IRENA
mathop
WAXD

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