Team:Heidelberg/Project/Visualization

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Killing - Colicin

Time series of killer and prey bacteria over 48 hours. Killer cells are marked with mCherry (red) and prey bacteria are marked with GFP (green). The intial ratio is 1:1, which can be recognized on the second and third frame (8h and 12h, respectively). Many prey and killer bacteria are grown after 36 hours (last three image frames). However, the faint green fluorescence (it is sharp!) indicates the weak prey metabolism due to the toxin. Toxin production and excretion is activated in killer bacteria by the signaling molecule autoinducer-1.

To see separate images click here


Microscopic Screening and Quantification of 2D bacterial landscapes

Screening of bacterial density in soft agar chamber. For a proof of principle the strain chemotactic strain HCB33 is applied to the middle of the chamber. On the left side of the chamber a 2% agar plug containing 10% of casamino acids. After ... hours the bacteria accumulate around the plug. Calculation of the mean of each image and subtraction of the background leads to a quantitative 2D representation of the bacterial density landscape. ??? This data can be compared to modeling results ???

Remark: The scans are taken from two different experiments due to the difficult adjustment of a constant focus.

Landscape1.jpg
Graph11.jpg
Graph12.jpg
Landscape2.jpg
Graph21.jpg
Graph22.jpg

Sensing test of Fusion Receptor with 2D Microscopy

Sensing test with Swarm Plates