文献类型：期刊文献

英文题名：Multi-layered structure of wood cell wall among hybrid poplars and its affect on mechanical properties

作者：Su, Minglei[1,2] He, Jiaqi[1] Jia, Ru[1] Wang, Yurong[1,3]

第一作者：Su, Minglei

通信作者：Wang, YR[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[2]Tsinghua Univ, Sch Environm, Beijing 100084, Peoples R China;[3]Nanjing Forestry Univ, Coinnovat Ctr Efficient Proc & Utilizat Forest Pro, Nanjing 210037, Peoples R China

年份：2025

卷号：304

外文期刊名：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES

收录：;EI(收录号：20250717884503);Scopus(收录号：2-s2.0-85217741667);WOS:【SCI-EXPANDED(收录号:WOS:001428479800001)】；

基金：The authors are grateful for the financial support from the National Key Research and Development Program of China (2023YFD2200501) .

语种：英文

外文关键词：Cell wall; Cellulose; Crystallinity; Lignin; Mechanical properties

摘要：Tree hybridization is important in enhancing tree quality, adaptability, and genetic variability; however, the molecular basis of cell wall at the sublayer scale that contributes to superior performance remains unclear. This study adopted a new perspective and chose three poplar clones with parent-offspring relationship as material. The cellulose structure, lignin content, morphology of cells were analyzed, and the relationship between cell wall multi-layered structure and mechanical properties was explored. As the result, crystallinity of the Nanyang poplar, the hybrid progeny is the highest, ascribing to its larger crystallite width (3.90 nm) and length (9.02 nm), while its microfibril angle (MFA) is smaller and not significantly different from the parents (Clone No. 50, Clone No. 36) with low impact on its mechanical properties. Besides, Nanyang poplar with the highest thicker fiber cell wall and larger wall-to-lumen ratio. Superior microstructure result in Nanyang poplar with the highest macro- mechanical properties, including modulus of elasticity (MOE), modulus of rupture (MOR), hardness, compressive strength; as well as supreme cell wall mechanical properties. Correlation analysis results showed that, strongest correlation was observed between the degree of crystallinity and the macro-mechanical properties of wood, specifically MOE, MOR and compressive strength. Additionally, a significant correlation was found between lignin content and the hardness of wood.