Variation in Hemicellulose Structure and Assembly in the Cell Wall Associated with the Transition from Earlywood to Latewood in Cryptomeria japonica
Variation in Hemicellulose Structure and Assembly in the Cell Wall Associated with the Transition from Earlywood to Latewood in Cryptomeria japonica
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DOI：
10.1080/02773813.2018.1434206
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发表时间：
2018-01-01
影响因子：
2
通讯作者：
Katayama, Y.
中科院分区：
文献类型：
--
作者：
Kurata, Y.;Mori, Y.;Katayama, Y.
纤维素微纤维（CMF）束的尺寸变化以与葡甘露聚糖/半乳葡甘露聚糖（GM/GGM）相互作用。阿拉伯-4-O-甲基葡萄糖醛酸木聚糖（AGX）键合的CMF束与GM/GGM涂层也有重要的作用，阐述这些组件之间的距离。由于GM/GGM和AGX的确切作用尚不清楚，因此尝试了洗脱分析以评估细胞壁之间的相互作用的强度。将日本雪松的早材（EW）和晚材（LW）分开。EW和LW中纤维素、半纤维素（GM/GGM和AGX）和木质素的化学组成基本相同。观察到GM/GGM、AGX中的侧链取代和葡萄糖醛酸侧链的离子键特征略有差异。基于对GM/GGM和AGX粘附于CMFs的测量，LW中形成强氢键的半纤维素比EW中更多。结果表明，半纤维素高度组装的LW产生了一个强大的细胞壁框架。
The size of cellulose microfibril (CMF) bundles varies to interact with glucomannan/galactoglucomannan (GM/GGM). Arabino-4-O-methylglucuronoxylan (AGX) bonded CMF bundles coated with GM/GGM also have important roles in elaborating the distance between these components. Since the precise roles of GM/GGM and AGX are not clear, the elution analysis to evaluate the strength of the interaction between the cell wall were tried. Earlywood (EW) and latewood (LW) were separated in a Japanese cedar. The chemical components of cellulose, hemicellulose including GM/GGM and AGX, and lignin were almost the same in EW and LW. Slight differences in GM/GGM, the side-chain substitution in AGX and the ionic bond characteristics of glucuronic acid side chains were observed. Based on measurements of GM/GGM and AGX adhering to CMFs, there were more hemicelluloses forming strong hydrogen bonds in LW than in EW. The results showed that the highly assembled hemicellulose in LW produced a strong cell wall framework.