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Dresden 2020 – wissenschaftliches Programm

Die DPG-Frühjahrstagung in Dresden musste abgesagt werden! Lesen Sie mehr ...

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BP: Fachverband Biologische Physik

BP 16: Poster IV

BP 16.16: Poster

Dienstag, 17. März 2020, 14:00–16:00, P2/EG

Shape-shifting intelligent active swimmers — •Arkajyoti Ghoshal and Anupam Sengupta — Physics of Living Matter Group, University of Luxembourg, Luxembourg City, Luxembourg

Shape, a key phenotypic trait in living systems, underpins crucial functions across different biological taxonomies. The ability of microbes (e.g., bacteria or algae) to dynamically shape-shift enables them to respond to external cues, optimize resources, and ultimately enhance fitness. Recent studies on microplankton have revealed exquisite mechanisms that allow cells to rapidly tune their shape and modulate motility under environmental perturbations [1]. Such adaptive traits play out over seconds to minutes timescales, offering biophysical insights that could be harnessed to engineer intelligent active swimmers. Combining single and population scale imaging, automation and tracking techniques, we catalogue active behavioral response of microbial species exposed to hydrodynamic cues over respective life cycles. Our results indicate that, for individual level, shape is a fundamental determinant of motility over cell lifecycle. At a population scale, variabilities in shape lead to intrinsic heterogeneity in motility traits, leading to an activity landscape that elicit a rich collective behavior over different flow regimes. These results provide quantitative insights which can be harnessed, on the one hand to elucidate niche composition in aquatic ecosystems, and on the other hand, tailor intelligent active matter based on adaptive biomechanics across scales. [1] A. Sengupta et al., Nature 543, 555, 2017. [2] Dynamic shape-motility coupling in active biological swimmers: A. Ghoshal & A. Sengupta (in prep).

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