学术报告：Fluid flows in bacterial colonies
报告题目: Fluid flows in bacterial colonies
报 告 人：Dr Yilin Wu (Department of Physics, The Chinese University of Hong Kong)
报告时间：2012年12月24日 下午1:00
报告地点：嘉定园区学术活动中心102室
报告简介：
When establishing biofilms, many bacterial species are able to move across surfaces in multicellular groups, a process known as swarming. Flagellated bacteria swarm within a thin layer of fluid. This microfluidic environment is critical to the physiology of swarming cells. We aimed to understand the interaction between swarming cells and the fluid layer. Using micron-sized bubbles as novel flow tracers, we discovered that the flagellar action of cells drives an extensive stream (or river) flowing along the colony edge, which may provide an avenue for long-range communication between cells. We also revealed a complex pattern of fluid drifts within the colony, and suggested a simple mechanism of swarm spreading.
• Wu Y, Jiang Y, Kaiser D, Alber M, "Social interactions in myxobacterial swarming", PLoS Comput Biol 3(12): e253 (2007).
• Wu Y, Kaiser D, Jiang Y, Alber M, "Periodic reversal of direction allows myxobacteria to swarm", Proc Natl Acad Sci USA 106(4): 1222–1227 (2009).
• Wu Y, Hosu BG, Berg HC, "Microbubbles reveal chiral fluid flows in bacterial swarms", Proc Natl Acad Sci USA 108(10): 4147-51 (2011).
• Wu Y, Jiang Y, Kaiser D, Alber M, "Self-organization in bacterial swarming: Lessons from Myxobacteria", Physical Biology 8: 055003 (2011).
• Wu Y, Berg HC, "Water reservoir maintained by cell growth fuels the spreading of a bacterial swarm", Proc Natl Acad Sci USA 109(11):4128-33 (2012).
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