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Poster

Session: Session 2 Presenting Authors at Posters (Evens)

P-322 - Efficiency of AHL-induced resistance (AHL-priming) depends on the interplay between barley genotype and environment

Thursday, July 17, 2025
13:30 - 15:15  
Location: Confex Hall 3
Plant microbiota functions and intermicrobial interactions

    Presenting Author(s)

  • MC

    Matthias Cambeis

    Julius Kuehn Institute (JKI)
    Braunschweig, Niedersachsen, Germany

    • Author(s)

  • NB

    Nina Bziuk

    Postdoctoral Researcher
    Katholieke Universiteit Leuven, Department of Biosystems, Division of Crop Biotechnics
    Leuven,, Vlaams-Brabant, Belgium

  • BS

    Benjamin Straube

    KWS Lochow GmbH
    Bergen,, Niedersachsen, Germany

  • DL

    Desirée Lauterbach

    Technical University Braunschweig
    Braunschweig, Niedersachsen, Germany

  • KS

    Kornelia Smalla

    Julius Kuehn Institute (JKI)
    Braunschweig, Niedersachsen, Germany

  • AS

    Adam Schikora

    Prof
    Julius Kühn Institute (JKI)
    Braunschweig, Niedersachsen, Germany

N-Acyl homoserine lactones (AHLs) are typically produced by various Gram-negative bacteria for population monitoring. These signalling molecules can be recognized by plants, leading to various beneficial effects. One of them is AHL-induced resistance (AHL-priming). AHL-primability was defined here as the effectiveness of increased resistance to various pathogens after perception of AHLs. Importantly, while parts of the involved pathways are known, the entire signalling cascade remains elusive. Many factors influencing AHL-primability may be easily controlled in vitro or in greenhouse experiments, these include AHL concentration, length of the side chain and combination of AHLs with different chain length. However, a crucial step is to bring these findings to agronomic conditions. Unfortunately, field-scale applications were largely absent. To close this gap, we conducted a four-years field experiment with barley as the host plant and the AHL-producing Ensifer meliloti. The performance of barley, with a particular focus on the impact on susceptibility to naturally occurring leaf diseases and pathogens, was monitored. Another key factor often overlooked in plant-microorganism interaction, is the plant genotype. Therefore, we used seven different barley lines, which represent barley’s genetic diversity. As a result, we identified plant genotype and the environment - particularly the air temperature and humidity - as the influencing factors to the AHL-primability.