Inhibition of the type III secretion system of Pseudomonas syringae pv. tomato DC3000 by resveratrol oligomers identified in Vitis vinifera L

Ji Eun Kang, Byeong Jun Jeon, Min Young Park, Hye Ji Yang, Jaeyoung Kwon, Dong Ho Lee, Beom Seok Kim

    Research output: Contribution to journalArticlepeer-review

    22 Citations (Scopus)

    Abstract

    BACKGROUND: The bacterial type III secretion system (T3SS) is one of the virulence determinants of Gram-negative bacteria through which various effector and virulence proteins are translocated into host cells. RESULTS: We constructed an assay system to screen inhibitors of hrpA gene expression (a structural gene of Hrp pili) in Pseudomonas syringae pv. tomato DC3000. In a plant extract library screening, the root extract of Vitis vinifera L. displayed the most prominent activity. Three resveratrol oligomers, hopeaphenol, isohopeaphenol and ampelopsin A, were identified in grapevine root extract, which significantly reduced the transcription levels of the hrpA, hrpL and hopP1 genes without growth retardation. Additional resveratrol derivatives identified in other plant extracts were also examined for their inhibitory effect on hrpA expression. Another resveratrol oligomer, kobophenol A, also inhibited the transcription of the hrpA gene and other T3SS-related genes, while resveratrol monomers (resveratrol and piceatannol) were not effective. The severity of bacterial specks was reduced by each hopeaphenol, isohopeaphenol and ampelopsin A treatment. CONCLUSION: These results show the potential of resveratrol derivatives as anti-virulence agents for the control of plant diseases.

    Original languageEnglish
    Pages (from-to)2294-2303
    Number of pages10
    JournalPest Management Science
    Volume76
    Issue number7
    DOIs
    Publication statusPublished - 2020 Jul 1

    Bibliographical note

    Funding Information:
    This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (NRF‐2017R1D1A1B03027996). The authors appreciate the support of an internal grant of Korea University.

    Publisher Copyright:
    © 2020 Society of Chemical Industry

    Keywords

    • Pseudomonas syringae pv. tomato
    • bacterial speck
    • resveratrol oligomer
    • type III secretion system inhibitor

    ASJC Scopus subject areas

    • Agronomy and Crop Science
    • Insect Science

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