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Poster

Session: Session 2 Presenting Authors at Posters (Evens)

P-244 - Evolution of resistance proteins in plant-associated bacteria

Thursday, July 17, 2025
13:30 - 15:15  
Location: Confex Hall 3
Nutrient exchange & role of metabolites in plant-microbe interactions

    Presenting Author(s)

  • LR

    Liza Rouyer

    Ludwig-Maximilians University (LMU) Munich
    Munich, GERMANY

    • Author(s)

  • YZ

    Yifan Zhu

    University of Munich, LMU
    Munich, Bayern, Germany

  • CB

    Claude Becker

    University of Munich
    Martinsried, Bayern, Germany

  • MP

    Martin Parniske

    Prof. Dr.
    University of Munich
    Munich, Bayern, Germany

  • NS

    Niklas Schandry

    Ludwig-Maximilians University (LMU) Munich
    Planegg / Martinsried, Bayern, Germany

Plants secrete an array of specialized metabolites, that can have antagonistic effects on surrounding microorganisms. To colonize plant roots, soil bacteria have evolved various mechanisms to escape the toxicity of plant secreted antibiotics. Rhizosphere bacteria contain more homologues of certain resistance proteins than bacteria from any other environment, suggesting that the coevolution with plants has favored the diversification of these proteins to detoxify diverse plant-secreted compounds. In this work, we investigated the prevalence of one type of resistance protein in bacteria isolated from the Arabidopsis rhizosphere and phyllosphere. We found that these bacteria harbor a high genetic diversity of homologues, with conserved operon organization and protein structures, despite an overall low sequence conservation. Using evolutionary genetics analysis, we found highly conserved motifs and regions of diversification, pointing towards a constrained evolution of resistance proteins and paving the way for understanding the mechanisms behind detoxification of plant-specialized metabolites by soil bacteria and consequent host-adaptation.