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The psyI and psyR Genes of Pseudomonas syringae pv. tomato DC3000 Contribute to Bacterial Virulence on Tomato.

Phytopathology - 1 Apr 2026

Yeemin Jirachaya, Rossidivito Gabrielle, Bridges David F, Panchal Shweta, Rodrigues Jorge L Mazza, Melotto Maeli

Abstract excerpt

The LuxI/LuxR system, which produces and perceives N-acyl homoserine lactones (AHLs), plays a significant role in regulating pathogenesis and communication in gram-negative bacteria. A homologous system exists in Pseudomonas syringae pv. tomato (Pst) DC3000, which is encoded by the single-copy genes psyI/psyR. We created a double-knockout mutant of the AHL synthase (psyI) and the AHL receptor (psyR) genes in Pst...

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PMID: 41364743
DOI: 10.1094/PHYTO-05-25-0192-R

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