期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 116, 期 -, 页码 1240-1249出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ijbiomac.2018.05.117
关键词
Chinese quince; Lignin-carbohydrate complex; Structure
资金
- earmarked fund for Modern Agro-industry Technology Research System [CARS14-1-29]
The lignin-carbohydrate complexes (LCCs) of the mesocarp (MS) and near the endocarp (NE) of Chinese quince (Chaenomeles sinensis) fruits were analyzed using three different methods of fractioning: milled wood lignin (MWL), LCC extracted from crude MWL with acetic acid (LCC-AcOH), and Bjorkman LCC. The MWL and LCC fractions were characterized by carbohydrate composition analysis, SEC, FT-IR, Py-GC/MS, thermal analysis and 2D HSQC NMR. Notably, large amounts of arabinose and galactose remained in the Bjorkman LCC fractions suggesting a chemical bond between the lignin and pectin. MWL and LCC-AcOH fractions showed better thermal stability than the Bjorkman LCC fractions. The structure of MS lignin was similar to that of NE lignin; however, fractions from the different fractionation methods revealed differences. The MWL fractions were rich in benzyl ether and gamma-ester linkages, while the Bjorkman LCC fractions contained phenyl glycoside and gamma-ester linkages, and the LCC-AcOH fractions contained phenyl glycoside and benzyl ether linkages. These findings are helpful in understanding the nature of lignin and LCC in Chinese quince fruits and provide a theoretical support for their potential application. (C) 2018 Elsevier B.V. All rights reserved.
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