arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1901.08682physics.bio-phcond-mat.soft
收藏

由于前向散射而增强表面上的运动细菌的繁殖

Enhanced propagation of motile bacteria on surfaces due to forward scattering

Stanislaw Makarchuk, Vasco C. Braz, Nuno A. M. Araújo, Lena Ciric, Giorgio Volpe

摘要:

运动细菌如何在表面附近移动是一个基本的生物物理学问题,并且是出现生物学、生态学和医学相关的几种现象(包括生物膜形成)的关键。固体边界可以强烈影响细胞的推进机制,从而导致许多鞭毛细菌描述长圆形轨迹稳定地被表面捕获。然而,对近表面细菌运动的实验研究忽略了这样一个事实,即真实环境具有随细胞运动尺度而变化的典型微观结构。在这里,我们表明,微障碍物的影响peritrichously鞭毛虫细菌在一个平面上以非单调的方式传播。而不是阻碍它,一个最佳的,相对较低的障碍物密度可以显着提高细胞的表面上的传播,由于个人的前向散射事件。这一发现为复杂环境中手性活性物质的新兴动力学提供了见解,并启发了控制自然栖息地微生物生态的可能途径。

英文摘要:

How motile bacteria move near a surface is a problem of fundamental biophysical interest and is key to the emergence of several phenomena of biological, ecological and medical relevance, including biofilm formation. Solid boundaries can strongly influence a cell's propulsion mechanism, thus leading many flagellated bacteria to describe long circular trajectories stably entrapped by the surface. Experimental studies on near-surface bacterial motility have, however, neglected the fact that real environments have typical microstructures varying on the scale of the cells' motion. Here, we show that micro-obstacles influence the propagation of peritrichously flagellated bacteria on a flat surface in a non-monotonic way. Instead of hindering it, an optimal, relatively low obstacle density can significantly enhance cells' propagation on surfaces due to individual forward-scattering events. This finding provides insight on the emerging dynamics of chiral active matter in complex environments and inspires possible routes to control microbial ecology in natural habitats.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑