植物细胞壁中多糖组装和相互作用的机械作用。

IF 5.5 2区 化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY
Yao Zhang, Jingyi Yu, Daniel J Cosgrove
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引用次数: 0

摘要

植物合成以多糖为基础的原代细胞壁,具有独特的微结构和机械性能,以适应植物生长和提供保护。由于原代细胞壁复杂的微观结构和高度非线性的力学响应,评估多糖组织和相互作用在原代细胞壁力学行为中的作用仍然具有挑战性。采用为洋葱表皮壁开发的粗粒度分子动力学模型,本工作探讨了多糖组装和相互作用可能在初代细胞壁力学中发挥重要作用的条件。纤维素-纤维素黏附在墙体承载能力中起主导作用,但当计算破坏纤维素-纤维素黏附时,纤维素-木葡聚糖黏附会影响墙体承载能力。与木葡聚糖机械地系住分离良好的纤维素微原纤维的普遍概念相反,木葡聚糖在这种情况下起着纤维间粘接剂的作用,能够在纤维素微原纤维之间传递张力。我们的发现可能会为受植物细胞壁启发的新材料的设计标准提供信息。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Mechanical Roles of Polysaccharide Assembly and Interactions in Plant Cell Walls.

Plants synthesize polysaccharide-based primary cell walls that possess unique microstructures and mechanical properties to accommodate plant growth and provide protection. It remains challenging to assess the role of polysaccharide organization and interactions in the mechanical behavior of primary cell walls owing to their complex microstructure and highly nonlinear mechanical responses. Employing a coarse-grained molecular dynamics model developed for onion epidermal walls, this work explores the conditions under which polysaccharide assembly and interactions might play a significant role in primary cell wall mechanics. Cellulose-cellulose adhesion plays a dominant role in the wall load-bearing capacity, but when cellulose-cellulose adhesion was disrupted computationally, cellulose-xyloglucan adhesion could influence the wall load-bearing capacity. Contrary to the common concept that xyloglucans mechanically tether well-separated cellulose microfibrils, xyloglucans functioned in this case as interfibrillar adhesives capable of transmitting tensile forces between cellulose microfibrils. Our findings may inform design criteria of new materials inspired by plant cell walls.

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来源期刊
Biomacromolecules
Biomacromolecules 化学-高分子科学
CiteScore
10.60
自引率
4.80%
发文量
417
审稿时长
1.6 months
期刊介绍: Biomacromolecules is a leading forum for the dissemination of cutting-edge research at the interface of polymer science and biology. Submissions to Biomacromolecules should contain strong elements of innovation in terms of macromolecular design, synthesis and characterization, or in the application of polymer materials to biology and medicine. Topics covered by Biomacromolecules include, but are not exclusively limited to: sustainable polymers, polymers based on natural and renewable resources, degradable polymers, polymer conjugates, polymeric drugs, polymers in biocatalysis, biomacromolecular assembly, biomimetic polymers, polymer-biomineral hybrids, biomimetic-polymer processing, polymer recycling, bioactive polymer surfaces, original polymer design for biomedical applications such as immunotherapy, drug delivery, gene delivery, antimicrobial applications, diagnostic imaging and biosensing, polymers in tissue engineering and regenerative medicine, polymeric scaffolds and hydrogels for cell culture and delivery.
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