NDLI: Revealing the Changes in Topochemical Characteristics of Poplar Cell Wall During Hydrothermal Pretreatment

Content Provider	Springer Nature Link
Author	Ma, Jing Zhang, Xun Zhou, Xia Xu, Feng
Copyright Year	2014
Abstract	Understanding of ultrastructural organization related to the biomass recalcitrance is critical for optimizing the deconstruction of cell wall to release fermentable sugars. In this study, the changes in topochemical characteristics of poplar cell wall pretreated with liquid hot water at 170 °C for 5, 10, 20, 30, and 40 min were investigated. The hydrothermal pretreatment (HTP) caused the alterations of surface morphological and chemical features in different cell wall sublayers in a time-dependent manner. Scanning electron microscopy observations revealed a reduction in re-deposited lignin droplets in the middle layer of secondary wall (S2 layer) after 20 min of pretreatment. Confocal Raman microscopy images exhibited that the loss of lignin concentration in the S2 layer was more than that in the compound middle lamella (CML) after 30 min of pretreatment, whereas the drop of hemicellulose concentration exhibited an opposite trend. Meanwhile, the decline of lignin and hemicellulose concentrations was accompanied by the increase in relative concentration of cellulose, indicating the exposure of embedded cellulose. The higher yield of enzymatic hydrolysis obtained from the poplars after 30 min of pretreatment were 38 %, indicating that the removal of lignin and hemicelluloses from the S2 layer and CML is likely to be important factors in increasing enzymatic hydrolysis of poplar. This study is expected to potentially promote understanding of ultrastructural features hindering cell wall deconstruction, making it effective to convert lignocellulosic biomass into sugars.
Starting Page	1358
Ending Page	1368
Page Count	11
File Format	PDF
ISSN	19391234
Journal	BioEnergy Research
Volume Number	7
Issue Number	4
e-ISSN	19391242
Language	English
Publisher	Springer US
Publisher Date	2014-05-18
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Hydrothermal pretreatment Topochemical characteristics Cell wall Lignin Plant Sciences Plant Genetics & Genomics Plant Breeding/Biotechnology Plant Ecology Wood Science & Technology
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment Agronomy and Crop Science

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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