KATHERINA PETROU
Algal physiology in a changing world
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Emperor penguin, Antarctica (2014)
Heron Island, Australia (2015)
Iceberg Alley, Antarctica (2015)
Acropora sp., Heron Island, Australia.
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Research areas...
Microalgal stress physiology and sulphur metabolism
T his research area involves understanding microalgal physiology and their responses to environmental perturbations. It also aims to understand the link between cell physiology and sulphur production with respect to oxidative stress and antioxidant function in photoautotrophs, including phytoplankton, corals and foraminifera.

Current projects: Acidification of the Southern Ocean: Effects on marine microbes | The role of DMSP in coral stress physiology | Primary production and macromolecular composition of Southern Ocean microalgae

Phytoplankton-bacteria interactions
I n collaboration with microbial ecologists, this work aims to determine how phytoplankton physiological condition influences bacterial associations at different spatial scales (micro - oceanographic). Specifically, it investigates how changes in the production and sensing of chemical cues (like DMSP) regulate marine microbial interactions.

Current projects: Social Networking in a Changing Ocean: Microbial-Scale Ecological Interactions Control Ocean-Scale Chemistry | Characterising microbial interactions that drive organic sulphur cycling in Antarctic waters

Marine microalgal symbioses (host-symbiont interactions)
U tilising single cell methods such as epifluorescence confocal microscopy, microscope fluorometry and infra-red microspectroscopy, this work examines the physiological and biochemical responses that occur at the cellular scale in corals and foraminifera.

Current projects: Coral bleaching from a single cell perspective | Macromolecular profiling of coral symbionts under bleaching stress conditions | Host mediated symbiont regulation in the foraminifera Marginopora vertebralis | Coral explants: A model organism for coral studies.