Anisotropic cell growth-regulated surface micropatterns in flower petals
Anisotropic cell growth-regulated surface micropatterns in flower petals
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花瓣中各向异性细胞生长调节的表面微图案
DOI：
10.1016/j.taml.2017.03.004
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发表时间：
2017-05-01
影响因子：
3.4
通讯作者：
Xie, Wei-Hua
中科院分区：
文献类型：
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作者：
Huang, Xiao;Hai, Yu;Xie, Wei-Hua
花瓣不仅具有多样的宏观形态，而且具有丰富的微观表面图案，这些图案对其生物功能至关重要。通过实验测量和理论分析，揭示了花瓣微褶皱形成的物理机制。以雏菊、红花、洋桔梗为例，对三种代表性花卉进行了调查。结合所测得的力学性能和生长率的表面微扰模型，用于阐明它们表面形貌的差异。表皮细胞的各向异性生长和表皮蜡的各向同性分泌之间的不匹配被发现决定了表面图案。(C)2017年，作者。由Elsevier Ltd代表中国理论与应用力学学会出版。
Flower petals have not only diverse macroscopic morphologies but are rich in microscopic surface patterns, which are crucial to their biological functions. Both experimental measurements and theoretical analysis are conducted to reveal the physical mechanisms underlying the formation of minute wrinkles on flower petals. Three representative flowers, daisy, kalanchoe blossfeldiana, and Eustoma grandiflorum, are investigated as examples. A surface wrinkling model, incorporating the measured mechanical properties and growth ratio, is used to elucidate the difference in their surface morphologies. The mismatch between the anisotropic epidermal cell growth and the isotropic secretion of surficial wax is found to dictate the surface patterns. (C) 2017 The Authors. Published by Elsevier Ltd on behalf of The Chinese Society of Theoretical and Applied Mechanics.