Vesicle-associated exudates from Alteromonas enhance growth and survival of Prochlorococcus in batch culture.

Alteromonas macleodii EZ55 exudates, including vesicles, significantly enhance Prochlorococcus MIT9312 growth and survival, with effects observed across all growth phases.

• Why it matters: Understanding microbial interactions is crucial for comprehending oceanic nutrient cycles and phytoplankton ecology, yet the mechanisms behind bacterial support of cyanobacteria remain unclear.
• What they did: Researchers analyzed the secreted products of Alteromonas, including heat-labile high-molecular-weight exudates and extracellular vesicles, over 500 generations of experimental evolution.
• The result: Vesicle-associated exudates improved Prochlorococcus growth, survival, and resource utilization, highlighting vesicle-mediated services as key factors in microbial community interdependencies.