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Lipopolysaccharide O-antigen delays plant innate immune recognition of Xylella fastidiosa

Author

Listed:
  • Jeannette N. Rapicavoli

    (University of California)

  • Barbara Blanco-Ulate

    (University of California
    University of California)

  • Artur Muszyński

    (University of Georgia)

  • Rosa Figueroa-Balderas

    (University of California)

  • Abraham Morales-Cruz

    (University of California)

  • Parastoo Azadi

    (University of Georgia)

  • Justyna M. Dobruchowska

    (University of Georgia)

  • Claudia Castro

    (University of California)

  • Dario Cantu

    (University of California)

  • M. Caroline Roper

    (University of California)

Abstract

Lipopolysaccharides (LPS) are among the known pathogen-associated molecular patterns (PAMPs). LPSs are potent elicitors of PAMP-triggered immunity (PTI), and bacteria have evolved intricate mechanisms to dampen PTI. Here we demonstrate that Xylella fastidiosa (Xf), a hemibiotrophic plant pathogenic bacterium, possesses a long chain O-antigen that enables it to delay initial plant recognition, thereby allowing it to effectively skirt initial elicitation of innate immunity and establish itself in the host. Lack of the O-antigen modifies plant perception of Xf and enables elicitation of hallmarks of PTI, such as ROS production specifically in the plant xylem tissue compartment, a tissue not traditionally considered a spatial location of PTI. To explore translational applications of our findings, we demonstrate that pre-treatment of plants with Xf LPS primes grapevine defenses to confer tolerance to Xf challenge.

Suggested Citation

  • Jeannette N. Rapicavoli & Barbara Blanco-Ulate & Artur Muszyński & Rosa Figueroa-Balderas & Abraham Morales-Cruz & Parastoo Azadi & Justyna M. Dobruchowska & Claudia Castro & Dario Cantu & M. Caroline, 2018. "Lipopolysaccharide O-antigen delays plant innate immune recognition of Xylella fastidiosa," Nature Communications, Nature, vol. 9(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-02861-5
    DOI: 10.1038/s41467-018-02861-5
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