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Changes of Chemical Composition and Hemicelluloses Structure in Differently Aged Bamboo (Neosinocalamus affinis) Culms

Author:
Yue, Pan-Pan, Fu, Gen-Que, Hu, Ya-Jie, Bian, Jing, Li, Ming-Fei, Shi, Zheng-Jun, Peng, Feng
Source:
Journal of agricultural and food chemistry 2018 v.66 no.35 pp. 9199-9208
ISSN:
1520-5118
Subject:
Bambusa emeiensis, Fourier transform infrared spectroscopy, Raman imaging, arabinose, bamboos, beta-glucans, cell walls, chemical composition, culms, dimethyl sulfoxide, hemicellulose, lignin, nuclear magnetic resonance spectroscopy, renewable energy sources, xylose
Abstract:
To study the differences in chemical composition analysis and spatial distribution of young Neosinocalamus affinis bamboo, we used the methods of standard of National Renewable Energy Laboratory and confocal Raman microscopy, respectively. It was found that the acid-soluble lignin and acid-insoluble lignin content showed an inverse relationship with the increasing bamboo age. Raman analysis revealed that Raman signal intensity of lignin in both the secondary cell wall and the compound middle lamella regions showed a similar increase trend with growth of bamboo. In addition, eight hemicellulosic fractions were obtained by successively treating holocellulose of the 2-, 4-, 8-, and 12-month-old Neosinocalamus affinis bamboo culms with DMSO and alkaline solution. The ratio of arabinose to xylose of hemicelluloses was increased with the growth of bamboo. FT-IR and NMR analyses revealed that DMSO-soluble hemicelluloses of young bamboo culms are mainly composed of highly substituted xylans and β-d-glucans.
Agid:
6123268