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+33 02 98 29 23 38
Ann Andersen
Professor of Sorbonne

I am studying the adaptations of invertebrates to constraint environments, such as deep-sea hydrothermal vents and cold seeps, which are extreme environments. Indeed, they periodically put sedentary fauna up to lacking oxygen in their close environment, and to be flooded with sulphides or methane emissions, which are respectively inhibiting the respiratory chain and an asphyxiating gas  To understand the mechanisms enabling their adaptation to hypoxia, I analyse their gills and the diversity of their respiratory pigments. To resist to sulphides and/or methane, some species house in their gills, bacteria able to transform these gasses, as carbon sources into sugar, for the benefit of their host. My aim is to understand how the host-symbiont relationship works, by studying cellular mechanisms (recognition, multiplication, apoptosis…), that may regulate symbiont densities. I use cell markers and diverse microscopy techniques.