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Poster

Session: Session 1 Presenting Authors at Posters (Evens)

P-352 - Arabidopsis SHRKs emerge as novel class of receptor kinases selectively involved in microbe accommodation

Tuesday, July 15, 2025
09:55 - 11:30  
Location: Confex Hall 3
Subcellular dynamics and signaling in host-microbe interactions

    Presenting Author(s)

  • AM

    Athanasios Makris

    Leibniz Institute of Plant Biochemistry
    Halle (Saale), Sachsen-Anhalt, Germany

    • Author(s)

  • MS

    Maja Schmidt

    Leibniz Institute of Plant Biochemistry
    Halle (Saale), Sachsen-Anhalt, Germany

  • TF

    Tora Fougner-Økland

    Ludwig-Maximilians-Universität
    Munich, Bayern, Germany

  • KP

    Katarzyna Parys

    LMU München
    München, Bayern, Germany

  • MR

    Martina Ried-Lasi

    Leibniz Institute of Plant Biochemistry
    Halle (Saale), Sachsen-Anhalt, Germany

Plants constantly encounter diverse microorganisms, engaging in both beneficial and detrimental interactions. The malectin-like domain leucine-rich repeat receptor-like kinase (MLD-LRR-RLK) SymRK is essential for establishing arbuscular mycorrhiza (AM) and nitrogen-fixing root nodule symbiosis. Previously, we identified two SymRK homologs in Arabidopsis thaliana, SHRK1 and SHRK2, which significantly influence the reproductive success of the downy mildew oomycete pathogen Hyaloperonospora arabidopsidis (Hpa). Through a comprehensive phylogenomic analysis of this protein family across land plants, we uncovered a sister clade of SymRK, designated SHRK3. Here, we demonstrate that Arabidopsis SHRK3, like SHRK1 and SHRK2, affects Hpa spore production. Moreover, shrk mutants displayed selective involvement in responses to a diverse range of pathogens. Finally, we provide evidence that SymRK and SHRKs interact with the ER-localized cell death suppressor Bax Inhibitor-1 (BI-1), suggesting a broader role in plant immunity.