Buckling as an origin of ordered cuticular patterns in flower petals
Buckling as an origin of ordered cuticular patterns in flower petals
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DOI：
10.1098/rsif.2012.0847
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发表时间：
2013-03-06
影响因子：
3.9
通讯作者：
Glover, Beverley J.
中科院分区：
文献类型：
--
作者：
Kourounioti, Rea L. Antoniou;Band, Leah R.;Glover, Beverley J.
植物表面的光学性质在很大程度上取决于表皮细胞的形状和细胞顶部角质层的图案。特定细胞形状与特定纳米级结构的组合可以产生广泛的光学效应。也许最值得注意的是，扁平花瓣细胞顶部角质层的有序脊的发育可以产生衍射光栅状结构。衍射光栅是已知的产生“结构色”的许多机制之一，结构色比化学色更强烈和纯净，并且可以呈现彩虹色。我们探讨的概念，机械屈曲的角质层的花瓣表皮可能会解释角质层脊的形成，使用一个理论模型，占发展中的压缩应力在角质层所产生的竞争之间的各向异性扩张的表皮细胞和各向同性角质层的生产。模型预测合理化角质层模式，包括那些具有长程秩序有可能产生虹彩，为一系列不同的花卉品种。
The optical properties of plant surfaces are strongly determined by the shape of epidermal cells and by the patterning of the cuticle on top of the cells. Combinations of particular cell shapes with particular nanoscale structures can generate a wide range of optical effects. Perhaps most notably, the development of ordered ridges of cuticle on top of flat petal cells can produce diffraction-grating-like structures. A diffraction grating is one of a number of mechanisms known to produce 'structural colours', which are more intense and pure than chemical colours and can appear iridescent. We explore the concept that mechanical buckling of the cuticle on the petal epidermis might explain the formation of cuticular ridges, using a theoretical model that accounts for the development of compressive stresses in the cuticle arising from competition between anisotropic expansion of epidermal cells and isotropic cuticle production. Model predictions rationalize cuticle patterns, including those with long-range order having the potential to generate iridescence, for a range of different flower species.