相关实验视频

Updated: Jul 6, 2025

Preparation, Imaging, and Quantification of Bacterial Surface Motility Assays

Preparation, Imaging, and Quantification of Bacterial Surface Motility Assays

Published on: April 7, 2015

细菌表面游泳状态由TIRF显微镜揭示

Qiuqian Liu¹, Rui He¹, Chi Zhang¹

¹Hefei National Research Center for Physical Sciences at the Microscale and Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China. jhyuan@ustc.edu.cn.

|January 2, 2024

概括

研究人员开发了一种使用全内部反射光 (TIRF) 显微镜研究细菌表面运动性的新方法. 他们在Pseudomonas aeruginosa中发现了六种不同的游泳状态,揭示了细菌在表面附近的运动的洞察力.

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:

细菌在表面附近的移动性对于生物膜的形成,分散和毒性至关重要.
在表面游泳期间细胞体的对齐影响了细菌的表面传感.

研究的目的:

开发一种高通量方法,用于描述细菌细胞与表面相对的细胞体方向.
识别和分析不同的细菌表面游泳状态.

主要方法:

使用了全内部反射光显微镜 (TIRF).
开发了一种通过图像交叉相关性来确定细胞体表面角的方法.
在不同的游泳状态下分析水力动力学力.

主要成果:

根据身体对齐和鞭毛状位置,确定了六种不同的表面游泳状态在Pseudomonas aeruginosa.
与"推"状态相比,在"拉"状态下观察到更高的近地游泳速度.
通过水力动力学力分析,提供了细菌表面游泳机制的见解.

结论:

开发的TIRF显微镜技术为研究细菌表面运动提供了一种高通量方法.
鉴定到的游泳状态和水力动力学的洞察力有助于我们更好地了解细菌在表面附近的行为.
这种技术广泛适用于各种细菌物种.

更多相关视频

Quantifying Bacterial Surface Swarming Motility on Inducer Gradient Plates

Quantifying Bacterial Surface Swarming Motility on Inducer Gradient Plates

Published on: January 5, 2022

Monitoring Spatial Segregation in Surface Colonizing Microbial Populations

Monitoring Spatial Segregation in Surface Colonizing Microbial Populations

Published on: October 29, 2016

相关概念视频

Total Internal Reflection Fluorescence Microscopy

Total Internal Reflection Fluorescence Microscopy

Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.