Molecular insights into the complex mechanics of plant epidermal cell walls

doi:10.1126/science.abf2824

GSTDTAP > 气候变化

DOI	10.1126/science.abf2824
	Molecular insights into the complex mechanics of plant epidermal cell walls
	Yao Zhang; Jingyi Yu; Xuan Wang; Daniel M. Durachko; Sulin Zhang; Daniel J. Cosgrove
	2021-05-14
发表期刊	Science
出版年	2021
英文摘要	Layers of intertwined fibers make up plant cell walls. The various types of fibers respond differently to deformation. Cellulose microfibrils, for example, can stretch or curve, changing their end-to-end length, and can also slide past each other, reorient relative directions, and bundle with neighboring microfibrils. Zhang et al. developed a computational model based on observations of onion skin epidermis that describes how these complex changes in space govern cell wall mechanics. The results inform ways to engineer multifunctional fibrous materials. Science , this issue p. [706][1] Plants have evolved complex nanofibril-based cell walls to meet diverse biological and physical constraints. How strength and extensibility emerge from the nanoscale-to-mesoscale organization of growing cell walls has long been unresolved. We sought to clarify the mechanical roles of cellulose and matrix polysaccharides by developing a coarse-grained model based on polymer physics that recapitulates aspects of assembly and tensile mechanics of epidermal cell walls. Simple noncovalent binding interactions in the model generate bundled cellulose networks resembling that of primary cell walls and possessing stress-dependent elasticity, stiffening, and plasticity beyond a yield threshold. Plasticity originates from fibril-fibril sliding in aligned cellulose networks. This physical model provides quantitative insight into fundamental questions of plant mechanobiology and reveals design principles of biomaterials that combine stiffness with yielding and extensibility. [1]: /lookup/doi/10.1126/science.abf2824
领域	气候变化 ; 资源环境
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/326814
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Yao Zhang,Jingyi Yu,Xuan Wang,et al. Molecular insights into the complex mechanics of plant epidermal cell walls[J]. Science,2021.
APA	Yao Zhang,Jingyi Yu,Xuan Wang,Daniel M. Durachko,Sulin Zhang,&Daniel J. Cosgrove.(2021).Molecular insights into the complex mechanics of plant epidermal cell walls.Science.
MLA	Yao Zhang,et al."Molecular insights into the complex mechanics of plant epidermal cell walls".Science (2021).