文献类型：期刊文献

英文题名：Characterization of Hemicellulose in Cunninghamia Lanceolata Stem During Xylogenesis

作者：Zheng, Biao[1,2] Yang, Haoqiang[1,2] Xu, Xiaoli[3] Xiang, Zhouyang[4] Hong, Zhou[5] Zheng, Huiquan[6] Wu, Aimin[1,2] Li, Huiling[1,2]

第一作者：Zheng, Biao

机构：[1] State Key Laboratory for Conservation and Utilization of Subtropical Agrobioresources, South China Agricultural University, Guangzhou, 510642, China; [2] Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, 510642, China; [3] Instrumental Analysis and Research Center, South China Agricultural University, Guangzhou, 510642, China; [4] State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, China; [5] Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou, 510520, China; [6] Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangdong Academy of Forestry, Guangzhou, 510520, China

年份：2022

外文期刊名：SSRN

收录：EI(收录号：20220304975)

语种：英文

外文关键词：Acetylation - High performance liquid chromatography - Nuclear magnetic resonance - Potassium hydroxide - Structural dynamics

摘要：Cunninghamia lanceolata is widely cultivated softwood in South China. To investigate the structural dynamics of its hemicellulose in the stem, hemicellulose was isolated from the apical, middle and basal part of the C. lanceolata stem using KOH and subsequently characterized by High Performance Liquid Chromatography (HPLC), Nuclear Magnetic Resonance (NMR) and other technical methods. The results showed that the main hemicellulose of C. lanceolata is O-acetylgalactoglucomannan (GGM) whose backbone is formed of glucose and mannose alternately linked by β-(1→4)-glycosidic bond with galactose and acetyl side chains. Another minor type of hemicellulose identified is 4-O-methylglucuronoarabinoxylan (GAX) consisting of a linear backbone of (1→4)-β-D-Xylp with 4-O-Me-α-D-GlcpA and α-L-Araf attached as side chains. During xylogenesis, the ratio of GGM/GAX in the hemicellulose pool of the stem gradually increases. Besides, the extent of glycosyl side chain of the apical part is higher than that of lower fractions while the degree of acetylation is lower. ? 2022, The Authors. All rights reserved.