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Poster

Session: Session 2 Presenting Authors at Posters (Evens)

P-354 - Investigating the role of sulfur metabolism in the beneficial interaction between SA190 and Arabidopsis under drought stress

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

    Presenting Author(s)

  • BE

    Büsra Elkatmis

    University of Cologne
    Köln

    • Author(s)

  • CM

    Cathérine Mannes

    Bachelor Student
    University of Cologne
    Köln, Nordrhein-Westfalen, Germany

  • MS

    Maged M. Saad

    Senior Research Scientist
    King Abdullah University of Science and Technology (KAUST)
    Thuwal, Makkah, Saudi Arabia

  • SK

    Stanislav Kopriva

    Group Leader/Prof. Dr.
    Botanical Institute, Cluster of Excellence on Plant Sciences (CEPLAS), University of Cologne, Cologne, Germany
    Köln, Nordrhein-Westfalen, Germany

  • HH

    Heribert Hirt

    Group Leader
    King Abdullah University of Science and Technology (KAUST)
    Thuwal, Makkah, Saudi Arabia

Drought is one of the most obvious consequences of climate change and significantly affects the biomass of crops. Finding a sustainable approach to mitigating the consequences of drought stress will help increase crop yields in agriculture. Plant growth-promoting bacteria are a sustainable option in agriculture to enhance crop yields, particularly in arid and semi-arid regions. Pseudomonas argentinensis SA190, discovered in Saudi Arabia, has been shown to improve plant performance under drought stress. However, more information is needed about the genes and mechanisms underlying the beneficial effects of SA190. Since sulfur and sulfur-containing compounds play a key role in abiotic stress responses, several Arabidopsis sulfur mutants were used to investigate SA190’s impact on sulfur metabolism under 25% PEG-induced drought stress. The findings revealed that SA190 enhanced sulfate uptake under 25% PEG stress. A buthionine sulfoximine (BSO) inhibition experiment further demonstrated that SA190 enhanced GSH accumulation in shoots under 25% PEG stress. Additionally, GSH/GSSG measurements indicated that SA190 improved the redox balance in Arabidopsis under non-stress and 25% PEG stress conditions. These findings suggest that SA190 may enhance plant drought tolerance by modulating sulfur metabolism and redox homeostasis.