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在两个鞭毛跳动状态之间依赖光的切换在微游泳者中选择了多样化的光学策略
Alan C H Tsang1, Ingmar H Riedel-Kruse2,3,4,5
1Department of Mechanical Engineering, The University of Hong Kong, Hong Kong, China.
概括
Euglena gracilis使用一种新的光响应反转机制来控制其运动. 这种机制允许微生物根据光强度在阳性和阴性光照中切换,指导其导航.
科学领域:
- 微生物学 微生物学
- 生物物理学的生物物理.
- 细胞生物学 细胞生物学
背景情况:
- 微生物通过复杂的传感器-执行器电路表现出出租车,即响应刺激的运动.
- 这些电路在不同的刺激条件下 (例如,杂与和) 选择不同的反应的机制仍然不太清楚.
- 光学,指导光的运动,对于许多微生物的生存和行为至关重要.
研究的目的:
- 研究Euglena gracilis在不同光强度下如何在正光和负光之间进行选择.
- 建议和评估光学微型游泳器的一般选择机制.
- 为了确定Euglena gracilis使用的特定机制.
主要方法:
- 生物物理建模以测试拟议的选择机制.
- 扰乱实验是为了破坏正常功能.
- 高速成像可以实时观察Euglena gracilis的行为.
主要成果:
- 生物物理建模支持了三种拟议的选择机制的有效性.
- 实验确定了"光响应逆转机制"是Euglena gracilis使用的.
- 这种机制涉及光强度依赖的鞭毛节拍状态的切换,改变游泳和转行为.
结论:
- 优格莱纳 (Euglena gracilis) 采用了一种协调的鞭毛节拍切换机制,用于光照.
- 这种机制可以在相应的低光强度和高光强度下,从正光向负光转换.
- 这些发现提供了对微游泳器导航和合成微游泳器设计原则的见解.
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