Genome mining and metabolomics reveal context-dependent biosynthetic potential in a core poplar dark septate endophyte.

Comparative genomics and metabolomics reveal context-dependent biosynthetic potential in Hyaloscypha finlandica, a Populus-associated dark septate endophyte, with 41 biosynthetic gene clusters identified.

• Why it matters: Understanding the metabolic capacity of DSEs like H. finlandica is crucial because they influence plant stress resilience, yet their specialized metabolism remains largely uncharacterized, limiting insights into their symbiotic mechanisms.
• What they did: The study combined genome mining across 41 ascomycete genomes with untargeted LC-MS/MS metabolomics of H. finlandica grown in different media, identifying conserved biosynthetic pathways and medium-associated shifts in chemical features.
• The result: Results support a framework for interpreting fungal multi-omics, with 7-oxodehydroabietic acid likely identified, and provide a resource for prioritizing candidate metabolites and gene clusters for future validation.