Quantification of Interbacterial Competition using Single-Cell Fluorescence Imaging.

Quantification of Interbacterial Competition using Single-Cell Fluorescence Imaging.
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DOI:
10.3791/62851
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发表时间:
2021-09-02
期刊:
Journal of visualized experiments : JoVE
影响因子:
--
通讯作者:
Septer AN
Septer AN
中科院分区:
其他
文献类型:
--
作者:
Smith S;Septer AN

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Interbacterial competition can directly impact the structure and function of microbiomes. This work describes a fluorescence microscopy approach that can be used to visualize and quantify competitive interactions between different bacterial strains at the single-cell level. The protocol described here provides methods for advanced approaches in slide preparation on both upright and inverted epifluorescence microscopes, live-cell and time-lapse imaging techniques, and quantitative image analysis using the open-source software FIJI. The approach in this manuscript outlines the quantification of competitive interactions between symbiotic Vibrio fischeri populations by measuring the change in area over time for two coincubated strains that are expressing different fluorescent proteins from stable plasmids. Alternative methods are described for optimizing this protocol in bacterial model systems that require different growth conditions. Although the assay described here uses conditions optimized for V. fischeri, this approach is highly reproducible and can easily be adapted to study competition among culturable isolates from diverse microbiomes.
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