| 摘要(英) |
The understanding of micro-organism is important in many scientific disciplines such as biology, medical science and engineer. Some recent experiments show that the microscopic molecular motors contribute to the cell locomotion and intracellular transportation. Bacterial flagellar motor is one of the most powerful molecular motor we have known. It can propel the cell up to the speed of tenth of the cell length per second. Therefore, the bacterial cells can be viewed as self-propelled particles. The collective motion of high density cells shows many interesting behaviors such as swarming.
Vibrio alginolyticus is a marine bacterium that has dual flagellar motor system, polar and lateral flagellar motors. The exact biological advantage of dual flagellar motor system is unknown. Here we present this investigation of the dual flagellar motor system including single cell speed and collective swarm measurements. We obtained three different strains of Vibrio alginolyticus, 138-2 (wild-type), VIO5 (polar+, lateral-), and YM19 (polar-, lateral+) for our investigation. We use Particle Imaging Velocimetry (PIV) to calculate the bacterial speed in high density. We also develop a micro-fluid flow-field measurement of bacteria.
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| 參考文獻 |
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