Ingrid Obernosterer

This study examines how marine prokaryotes respond transcriptionally to Fe-rich colloids from glacial and non-glacial sources, revealing contrasting growth and metabolic responses.

The paper identifies two TBDTs in Marinobacter nauticus that mediate Fe-petrobactin uptake, showing distinct regulatory mechanisms and evolutionary trajectories, and demonstrates Fe-petrobactin's role in stimulating prokaryotic growth in Southern Ocean communities.

The paper compares BONCAT-pic and microautoradiography to measure prokaryotic activity in the deep ocean, finding BONCAT-pic more sensitive and reliable.