Document Detail


TMAH Thermochemolysis for Probing in situ Softwood Lignin Modification in Each Gut Segment of Termite.
MedLine Citation:
PMID:  23331126     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Termites are highly effective in lignocellulose degradation; however, the process of lignin deconstruction along the alimentary canal is not well understood. In this study, the wood metabolites in each gut segment were tentatively analyzed using pyrolysis gas chromatography mass spectrometry in presence of tetramethylammonium hydroxide. Collectively, the significant differences in the pyrolysate distribution among each sample established: (1) conservation of the major β-O-4' bonds of lignin during termite digestion, although a selective lignin sub-structure modification was observed across the whole gut; (2) initiation of lignin-polysaccharide dissociation, aliphatic oxidation/carboxylation, phenolic dehydroxylation in the foregut, and linkages modification of the 5-5', β-5', β-1' substructure; (3) the foregut-reactions continued into the midgut with further phenolic carboxylation/ demethoxylation/ carbonylation; and (4) phenolic/aliphatic esterifications in the hindgut. Overall, elucidation of the step-wise lignin unlocking mechanism in termites provides a valuable insight for understanding plant cell wall structure and its recalcitrance.
Authors:
Jing Ke; Dhrubo Laskar; Shulin Chen
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-21
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  -     ISSN:  1520-5118     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-21     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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