Unveiling the Structural Characteristics of Lignin and Lignin–Carbohydrate Complexes in Fibers and Parenchyma Cells of Moso Bamboo during Different Growing Years,Journal of Agricultural and Food Chemistry

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Unveiling the Structural Characteristics of Lignin and Lignin–Carbohydrate Complexes in Fibers and Parenchyma Cells of Moso Bamboo during Different Growing Years
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2024-09-04 , DOI: 10.1021/acs.jafc.4c04010
Chen Zhang ₁ , Jing Liu ₁ , Yanrong He ₁ , Jialong Wen ₁ , Tong-Qi Yuan ₁

Affiliation

Understanding and recognizing the structural characteristics of lignin–carbohydrate complexes (LCCs) and lignin in different growth stages and tissue types of bamboo will facilitate industrial processes and practical applications of bamboo biomass. Herein, the LCC and lignin samples were sequentially isolated from fibers and parenchyma cells of bamboo with different growth ages. The diverse yields of sequential fractions not only reflect the different biomass recalcitrance between bamboo fibers and parenchyma cells but also uncover the structural heterogeneity of these tissues at different growth stages. The molecular structures and structural inhomogeneities of the isolated lignin and LCC samples were comprehensively investigated. The results showed that the structural features of lignin and LCC linkages in parenchyma cells were abundant in β-O-4 linkages but less with carbon–carbon linkages, suggesting that lignin and cross-linked LCC in parenchyma cells are simple in nature and easily to be tamed and tractable in the current biorefinery. Parallelly, the different ball-milled samples were directly characterized by high-resolution (800 M) solution-state 2D-HSQC NMR to analyze the whole lignocellulosic material. Overall, the scheme presented in this study will provide a comprehensive understanding of lignin and LCC linkages in fibers and parenchyma cells of bamboo and enable the utilization of bamboo biomass.

中文翻译：

揭示不同生长年份毛竹纤维和薄壁细胞中木质素和木质素-碳水化合物复合物的结构特征

了解和认识竹子不同生长阶段和组织类型的木质素-碳水化合物复合物（LCC）和木质素的结构特征将有助于竹子生物质的工业化进程和实际应用。在此，LCC和木质素样品依次从不同生长年龄的竹子的纤维和薄壁细胞中分离出来。连续组分的不同产量不仅反映了竹纤维和薄壁细胞之间不同的生物量顽抗性，而且揭示了这些组织在不同生长阶段的结构异质性。对分离的木质素和LCC样品的分子结构和结构不均匀性进行了全面研究。结果表明，薄壁细胞中木质素和LCC键的结构特点是β- O -4键较多，而碳-碳键较少，表明薄壁细胞中木质素和交联LCC性质简单，易于制备。在当前的生物精炼厂中可以被驯服和驯服。同时，通过高分辨率 (800 M) 溶液态 2D-HSQC NMR 直接表征不同的球磨样品，以分析整个木质纤维素材料。总体而言，本研究提出的方案将提供对竹子纤维和薄壁细胞中木质素和 LCC 连接的全面了解，并实现竹子生物质的利用。

更新日期：2024-09-04

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