Noise and Synchronization in Pairs of Beating Eukaryotic Flagella
Noise and Synchronization in Pairs of Beating Eukaryotic Flagella
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DOI：
10.1103/physrevlett.103.168103
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发表时间：
2009-10-16
影响因子：
8.6
通讯作者：
Tuval, Idan
中科院分区：
文献类型：
--
作者：
Goldstein, Raymond E.;Polin, Marco;Tuval, Idan
长期以来，人们一直认为，真核生物鞭毛之间的流体动力学相互作用是它们普遍存在的同步形式的基础;然而，还没有实验测试这种联系。双鞭毛的披衣菌是这类研究的一个简单模型，因为它的两个鞭毛是真核生物中最常见的鞭毛的代表。利用显微操作和高速成像技术，我们证明了一个C。Reinhardtii细胞呈现被相位滑移中断的同步周期。滑动的动力学和锁相间隔的统计是一致的流体动力学耦合振荡器的低维随机模型，与噪声振幅设置由单个鞭毛节拍的内在波动。
It has long been conjectured that hydrodynamic interactions between beating eukaryotic flagella underlie their ubiquitous forms of synchronization; yet there has been no experimental test of this connection. The biflagellate alga Chlamydomonas is a simple model for such studies, as its two flagella are representative of those most commonly found in eukaryotes. Using micromanipulation and high-speed imaging, we show that the flagella of a C. reinhardtii cell present periods of synchronization interrupted by phase slips. The dynamics of slips and the statistics of phase-locked intervals are consistent with a low-dimensional stochastic model of hydrodynamically coupled oscillators, with a noise amplitude set by the intrinsic fluctuations of single flagellar beats.