论文标题
水影响生长的水生植物叶的形态发生
Water affects morphogenesis of growing aquatic plant leaves
论文作者
论文摘要
莲花叶漂浮在水上通常会经历短波长的边缘皱纹，而裂缝向中心腐烂，而在水上生长的叶子通常会变成一个全球弯曲的锥形，并在边缘附近有长波动的波浪。观察结果表明，潜在的水（液体底物）显着影响叶子的形态发生。为了了解这种现象下的生物物理机制，我们开发了数学模型，这些模型可以有效地解释浮动和自由叶子的不均匀差异生长，以定量预测其形态的形成和演变。在理论上和实验上，我们都发现，短波屈曲构型在能量上有利于生长位于液体上的膜，而全球屈曲形状更可取，更可取。还研究了其他影响因素，例如茎/静脉，异质性和维度。我们的结果提供了对受水基础影响的各种植物形态发生的基本见解，并建议可以利用使用底物或边缘驱动来利用这种表面不稳定性来控制仿生可部署结构。
Lotus leaves floating on water usually experience short-wavelength edge wrinkling that decays toward the center, while the leaves growing above water normally morph into a global bending cone shape with long rippled waves near the edge. Observations suggest that the underlying water (liquid substrate) significantly affects the morphogenesis of leaves. To understand the biophysical mechanism under such phenomena, we develop mathematical models that can effectively account for inhomogeneous differential growth of floating and free-standing leaves, to quantitatively predict formation and evolution of their morphology. We find, both theoretically and experimentally, that the short-wavelength buckled configuration is energetically favorable for growing membranes lying on liquid, while the global buckling shape is more preferable for suspended ones. Other influencing factors such as stem/vein, heterogeneity and dimension are also investigated. Our results provide a fundamental insight into a variety of plant morphogenesis affected by water foundation and suggest that such surface instabilities can be harnessed for morphology control of biomimetic deployable structures using substrate or edge actuation.
