Molecular and cellular insights into the parasitic infection of bloom-forming marine diatoms by Pirsonia diadema.

Pirsonia diadema infects bloom-forming Coscinodiscus diatoms through a rapid life cycle involving specialized cytoskeletal mechanisms, revealing unique genetic adaptations.

• Why it matters: Understanding microbial host-parasite interactions is crucial for grasping their influence on global biogeochemical cycles, yet their cellular and evolutionary details are largely unknown.
• What they did: Researchers developed a model system using culture conditions, live-cell imaging, genome sequencing, and dual RNA sequencing to analyze infection dynamics and genetic innovations in Pirsonia.
• The result: Findings highlight stage-specific roles of Pirsonia's cytoskeleton in host attachment and feeding structure formation, offering insights into parasitic strategies shaping marine trophic networks.