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Pierce's Disease
Research Updates

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What is Pierce's Disease?

Pierce's Disease is a bacterial infection, which is spread by bugs that feed on grapevines, particularly the "glassy winged sharpshooter." Grapevines that become infected with PD can quickly become sick and die.

glassy-winged sharpshooter

DETECTION OF SIDEROPHORES IN THE ENDOPHYTIC BACTERIA METHYLOBACTERIUM SPP. ASSOCIATED WITH XYLELLA FASTIDIOSA

  • Author(s): Lacava, Paulo; Pacheco, Fl?via; Stenico, Maria; Araujo, Welington; Azevedo, Jo?o; Carrilho, Emanuel; Simionato, Ana; Tsai, Siu;
  • Abstract: We analyzed the production of siderophores by endophytic bacteria Methylobacterium spp., which occupy the same niche as Xylella fastidiosa (Xf) in citrus plants. All strains of Methylobacterium spp. tested were CAS-positive for siderophore production. Methylobacterium spp. produced hydroxamate-type, but not catechol-type siderophores. Specific primers for pyoverdin, a hydroxamate type ferrisiderophore receptor gene were used to amplify this gene from Methylobacterium strains. The growth of Xf was stimulated by the presence of a supernatant-siderophore of endophytic Methylobacterium mesophilicum. If Xf is able to use heterologous siderophores during its establishment inside the host plant, it may benefit from production of siderophores by endophytic symbionts.
  • Publication Date: Nov 2006
  • Journal: 2006 Pierce's Disease Research Symposium

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