Pan-proteome regulation of marine Synechococcus nutrient stress plasticity.

Genomic diversity in marine Synechococcus explains most variation in nutrient stress plasticity, with non-core protein expression predicting deviations in elemental regulation.

• Why it matters: Understanding how phytoplankton buffer productivity against climate-driven nutrient declines is crucial for predicting oceanic nutrient cycling, but the mechanistic links between genomic adaptation and physiological regulation are unclear.
• What they did: Researchers combined continuous culture experiments with proteomics and elemental analyses on six Synechococcus strains, maintaining fixed growth rates under nitrogen- or phosphorus-limiting conditions to isolate lineage-specific responses.
• The result: Genomic diversity influences proteomic adjustments and broadens C:P and N:P ranges, suggesting that pan-proteome regulation enhances phytoplankton nutrient stress buffering capacity under future climate scenarios.