Structural commonalities and deviations in the hierarchical organization of crossed-lamellar shells: A case study on the shell of the bivalve Glycymeris glycymeris
Structural commonalities and deviations in the hierarchical organization of crossed-lamellar shells: A case study on the shell of the bivalve Glycymeris glycymeris
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DOI：
10.1557/jmr.2016.46
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发表时间：
2016-03-14
影响因子：
2.7
通讯作者：
Wolf, Stephan E.
中科院分区：
文献类型：
--
作者：
Boehm, Corinna F.;Demmert, Benedikt;Wolf, Stephan E.
Glycymeris Glycymeris(Linne 1758)甲壳的结构组织由五个层次组成，具有明显的结构共性和与其他交叉片层贝壳的差异。存在于其他交叉层片贝壳中的被称为二次层片的层级没有出现，突显了当前使用的命名法的一个缺点。在中尺度上，次生微管穿透苍白球，起到止裂作用。此外，扩展薄片遵循弯曲轨迹，可能影响裂纹扩展、裂纹偏转和能量耗散机制，同时绕过分层。最后，至少有两个结构元素与外部环状和环状刺激有关。这强调了内生节律可能有助于并(共同)控制复杂矿化组织的自组织，在研究生物矿化时完全依赖还原方法是不够的。
The structural organization of the palliostracum-the dominant part of the shell which is formed by the mantle cells-of Glycymeris glycymeris (Linne 1758) is comprised of five hierarchical levels with pronounced structural commonalities and deviations from other crossed-lamellar shells. The hierarchical level known as second order lamellae, present within other crossed-lamellar shells, is absent highlighting a short-coming of the currently used nomenclature. On the mesoscale, secondary microtubules penetrate the palliostracum and serve as crack arrestors. Moreover, the growth lamellae follow bent trajectories possibly impacting crack propagation, crack deflection, and energy dissipation mechanisms whilst circumventing delamination. Finally, at least two structural elements are related to external circatidal and circaanular stimuli. This emphasizes that endogeneous rhythms may contribute and (co-) control the self-organization of a complex mineralized tissue and that it is insufficient to rely fully on a reductionistic approach when studying biomineralization.