Nonlinear Phototaxis and Instabilities in Suspensions of Light-Seeking Algae,Physical Review Letters

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Nonlinear Phototaxis and Instabilities in Suspensions of Light-Seeking Algae
Physical Review Letters ( IF 8.1 ) Pub Date : 2022-06-21 , DOI: 10.1103/physrevlett.128.258101
Aina Ramamonjy ₁ , Julien Dervaux ₁ , Philippe Brunet ₁

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The mechanism by which living organisms seek optimal light conditions—phototaxis—is a fundamental process for motile photosynthetic microbes. It is involved in a broad array of natural processes and applications from bloom formation to the production of high-value chemicals in photobioreactors. Here, we show that a population of the model alga Chlamydomonas reinhardtii exhibits a highly sensitive nonlinear response to light and demonstrate that the self-organization of cells in a heterogeneous environment becomes unstable as the result of a coupling between bioconvective flows and phototaxis.

中文翻译：

寻光藻类悬浮液的非线性趋光性和不稳定性

生物体寻求最佳光照条件的机制——趋光性——是活动光合微生物的基本过程。它涉及广泛的自然过程和应用，从开花形成到在光生物反应器中生产高价值化学品。在这里，我们展示了一组模型藻类莱茵衣藻对光表现出高度敏感的非线性响应，并证明由于生物对流流动和趋光性之间的耦合，细胞在异质环境中的自组织变得不稳定。

更新日期：2022-06-21

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