细胞壁
各向异性
纤维素
各向同性
生物物理学
表征(材料科学)
材料科学
植物细胞
微纤维
化学
纳米技术
光学
生物
生物化学
物理
基因
作者
Jongcheol Lee,Juseok Choi,Luyi Feng,Jingyi Yu,Yu-Jun Zheng,Qian Zhang,Yen‐Ting Lin,Saroj Kumar Sah,Ying Gu,Sulin Zhang,Daniel J. Cosgrove,Seong H. Kim
出处
期刊:Biomacromolecules
[American Chemical Society]
日期:2023-09-13
卷期号:24 (11): 4759-4770
被引量:1
标识
DOI:10.1021/acs.biomac.3c00538
摘要
Cellulose microfibrils (CMFs) are a major load-bearing component in plant cell walls. Thus, their structures have been studied extensively with spectroscopic and microscopic characterization methods, but the findings from these two approaches were inconsistent, which hampers the mechanistic understanding of cell wall mechanics. Here, we report the regiospecific assembly of CMFs in the periclinal wall of plant epidermal cells. Using sum frequency generation spectroscopic imaging, we found that CMFs are highly aligned in the cell edge region where two cells form a junction, whereas they are mostly isotropic on average throughout the wall thickness in the flat face region of the epidermal cell. This subcellular-level heterogeneity in the CMF alignment provided a new perspective on tissue-level anisotropy in the tensile modulus of cell wall materials. This finding also has resolved a previous contradiction between the spectroscopic and microscopic imaging studies, which paves a foundation for better understanding of the cell wall architecture, especially structure-geometry relationships.
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