Prof Stuart Humphries

University of Lincoln

Shape effects on microscale swimmers

Fluids and Materials Seminar

26th April 2018, 2:00 pm – 3:00 pm
Main Maths Building, SM3

Microbes in general, and bacteria in particular, exhibit great diversity in their shapes. However, while morphology is routinely linked to performance in multicellular organisms there are almost no similar studies in bacteria. Our lab has been exploring the functional aspects of bacterial shape, and I will highlight a set of recent studies involving multiple cell tracking, microfluidic experiments and numerical modelling of the links between cell shape and motility. I will show that lengthening of individual cells has profound influences on both a range of motility parameters, and swimming-driven chemotactic behaviours, that have implications for the ecology of these organisms. Accurate numerical models of bacterial cell shape also allow us to show that a wide range of motile species, including spheres, straight-, and curved-rods, are Pareto optimal due a trade-off between construction cost, swimming efficiency, and chemotactic ability.

Organiser: Rachel Bennett

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