The first of many articles (we are optimists!) coming out of collaboration with my colleague Jean-Philippe Bellenger (chemistry department, Université de Sherbrooke) was recently accepted in Applied and Environmental Microbiology. Our PhD student Adrien Rizzi used an elegant combination of analytical chemistry (ICP-MS - inductively coupled plasma mass spectrometry) and microbiology techniques to follow in parallel intracellular iron, biofilm formation and cell growth of B. subtilis within a biofilm. This approach allowed us to demonstrate that in a liquid non-shaking medium, siderophore production and biofilm formation are both required for the cells to acquire extracellular iron. These findings open very interesting and important perspectives on the role of biofilm formation in iron acquisition in natural environment. You can read more about this here.
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