裸藻侧向趋光性引起的局部生物对流
Localized bioconvection of Euglena caused by phototaxis in the lateral direction
摘要：
裸藻是一种游动的微生物，在明亮的光照下，其生物对流特性定位于密封腔的中心，从而诱导负趋光性。这种局部模式由高密度斑点组成，其中发现了对流。这些观察结果是通过基于单个细胞在垂直和横向方向上的趋光性的数学模型再现的。我们的研究结果表明，这种对流是维持向上游泳，一般的生物对流，和本地化起源于侧向趋光性。
英文摘要：
Euglena, a swimming micro-organism, exhibited a characteristic bioconvection that was localized at the center of a sealed chamber under bright illumination to induce negative phototaxis. This localized pattern consisted of high-density spots, in which convection was found. These observations were reproduced by a mathematical model that was based on the phototaxis of individual cells in both the vertical and lateral directions. Our results indicate that this convection is maintained by upward swimming, as with general bioconvection, and the localization originates from lateral phototaxis.
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