论文标题
藻类鞭毛的手性节拍：通过成像的力和扭矩
The chiral beat of algal flagella: force and torque via imaging
论文作者
论文摘要
鞭毛使真核细胞移动和泵送流体。我们介绍了Chlamydomonas Reinhardtii的鞭毛波形的第一个三维时间分辨的成像，这是一种在淡水中发现的模型藻类。在动力中风期间，我们发现鞭毛显示有关细胞中心线的旋转对称性，但是在恢复中风期间，它们显示了围绕相同轴的镜像对称性。我们使用三维成像数据来测试电阻理论的适用性时，当使用微型移液器上的单元格近似无力的构型时。细胞的游泳速度和旋转速率的推断值与自由游泳细胞的实验结果表现出良好的一致性。
Flagella allow eukaryotic cells to move and pump fluid. We present the first three-dimensional, time-resolved imaging of the flagellar waveform of Chlamydomonas reinhardtii, a model alga found in fresh water. During the power stroke, we find that the flagella show rotational symmetry about the cell's centreline, but during the recovery stroke they display mirror symmetry about the same axis. We use our three-dimensional imaging data to test the applicability of resistive force theory when a force-free configuration is approximated using a cell on a micropipette. The inferred values of cells' swimming speeds and rotation rates show good agreement with experimental results on freely swimming cells.
