Anisotropic cell growth-regulated surface micropatterns in flower petals  

作　　者：Xiao Huang Yu Hai Wei-Hua Xie 

机构地区：[1]Institute of Applied Physics and Computational Mathematics, Beijing 10094, China [2]Institute of Biomechanics and Medical Engineering, AML, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China [3]Tsinghua University High School, Beijing 100084, China [4]Institute of Telecommunication Satellite, China Academy of Space Technology, Beijing 100094, China

出　　处：《Theoretical & Applied Mechanics Letters》2017年第3期169-174,共6页力学快报（英文版）

基　　金：Supports from the National Natural Science Foundation of China(11602027);the National Science Foundation for Post-doctoral Scientists of China(2016M600969)

摘　　要：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 grandiflorurn, 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.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 grandiflorurn, 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.

关 键 词：Growth BIOMECHANICS Cuticle MICROPATTERN Flower petal 

分 类 号：Q944.58[生物学—植物学]