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Poster

Session: Session 1 Presenting Authors at Posters (Evens)

P-108 - Application of using multifunctional citrus-derived antimicrobial peptide to manage diverse bacterial and fungal pathogens

Tuesday, July 15, 2025
09:55 - 11:30  
Location: Confex Hall 3
Management of diseases and emerging diseases

    Presenting Author(s)

  • CH

    Chien Yu Huang

    Louisiana State University
    Baton Rouge, Louisiana, United States

    • Author(s)

  • MG

    Marco Gebiola

    Department of Agricultural Sciences, University of Naples Federico II
    Napoli, Sardegna, Italy

  • KM

    Kerry Mauck

    Department of Entomology, UC Riverside, Riverside
    Riverside, California, United States

  • YW

    Yali Wei

    Department of Plant Pathology and Microbiology, UC Riverside
    Riverside, California, United States

  • LD

    Luis De Luna Valdez

    Department of Plant Pathology and Microbiology, UC Riverside
    Riverside, California, United States

  • HJ

    Hailing Jin, PhD (she/her/hers)

    University of California
    Riverside, California, United States

The novel stable antimicrobial peptide (SAMP) from finger lime can suppress bacterial pathogen, Candidatus Liberibacter species, and induce host defense response. It has been developed as an innovative, environmentally friendly solution for citrus greening. Due to its natural properties, SAMP can be used for external application or internal synthesis by plants to generate disease-resistant varieties as a cost-effective approach. Here, we tested the efficacy of SAMP in suppressing important crop diseases and evaluated the potential of using SAMP to generate disease-resistant crops. We found externally treating SAMP could suppress bacterial diseases, including potato zebra chip (ZC) and grape Pierce’s disease, as well as fungal diseases such as gray mold on tomato and soybean diseases caused by Cercospora species. To evaluate the feasibility of internal synthesizing SAMP in host plant tissue, we expressed SAMP in Arabidopsis with different promoters and challenged with bacteria, Pseudomonas syringae pv. tomato DC3000 and Xanthomonas campestris pv. campestris. The result indicates that SAMP-expressed plants are more resistant to the infection, which supports the idea that SAMP-expressed plants confer disease resistance. Indeed, SAMP-expressed potato plants become more resistant to ZC. To sum up, we proved SAMP can be used to treat different diseases with feasible practices for integrated pest management and generate disease-resistant crops for disease management.