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Poster

Session: Session 2 Presenting Authors at Posters (Odds)

P-327 - Enterobacter sp. SA187 promotes Arabidopsis thaliana growth at elevated temperature via the histone H3K27 demethylase

Wednesday, July 16, 2025
13:30 - 15:15  
Location: Confex Hall 3
Plant microbiota functions and intermicrobial interactions

    Presenting Author(s)

  • AF

    ANAM Fatima

    PhD student
    King Abdullah University Of Science and Technology
    Thuwal, Makkah, Saudi Arabia

    • Author(s)

  • KS

    Kirt Shekhawat

    Research Scientist
    King abdullah university of science and technology
    Makkah, Makkah, Saudi Arabia

  • LA

    Louai Alidrissi

    PhD student
    KAUST
    Thuwal, Makkah, Saudi Arabia

  • WA

    Waad Alzaed

    PhD student
    KAUST
    Thuwal, Makkah, Saudi Arabia

  • HF

    Hafiz Farooq

    PhD student
    KAUST
    Thuwal, Makkah, Saudi Arabia

  • HH

    Heribert Hirt

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

Global warming poses a substantial threat to plant survival and productivity, demanding novel ways for conferring thermotolerance. Plants adapt to high elevated temperatures by undergoing a series of morphological and developmental changes. This study explores the pivotal role of the beneficial microbe Enterobacter sp. SA187 in enhancing plant adaptation and development to high elevated temperature. SA187 establishes a symbiotic relationship with Arabidopsis thaliana, activating key genetic elements such as histone demethylases and ethylene transcription factors EIN2 / EIN3. Our findings indicate that SA187 enhances thermotolerance by regulating the expression of heat-responsive genes. Specifically, SA187 uses epigenetic mechanism by reducing H3K27me3 levels, thus facilitating the activation of genes involved in heat stress adaptation. In the mutant line, these beneficial effects were lost, highlighting the critical role of histone demethylases. Furthermore, histone demethylases mutant cooperates with the ethylene signaling pathway, synergistically activating heat-responsive marker genes under warm ambient temperature. SA187 enhances reproductive fitness by increasing pollen viability and germination, with ethylene signaling regulating this process through H3K27me3 modulation, ultimately contributing to higher crop yields.