Functional divergence within mulberry-associated Pantoea ananatis: Insights from comparative genomics and host-contact metabolomics.

Pa-6 and YSFJ mulberry-associated Pantoea ananatis show contrasting host-contact phenotypes despite ~98.9% average nucleotide identity, with Pa-6 linked to later-stage disease reduction.

• Why it matters: Functional divergence among closely related Pantoea ananatis strains is poorly explained, limiting understanding of which genomic and metabolic features align with beneficial versus pathogenic outcomes.
• What they did: The study phenotyped 18 mulberry-associated isolates and used Pa-6 and YSFJ for comparative genomics and host-contact extracellular metabolomics, including pathway mapping of metabolite profiles.
• The result: Pa-6’s GH19-associated locus and YSFJ’s wbpZ- and feoB-associated loci, alongside distinct metabolomic pathway patterns, provide genomic and metabolic context for further testing of strain-specific contributions.

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