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Current Microbiology

, Volume 47, Issue 4, pp 0323–0326 | Cite as

Atypical Adaptive and Cross-Protective Responses Against Peroxide Killing in a Bacterial Plant Pathogen, Agrobacterium tumefaciens

  • Paiboon Vattanaviboon
  • Warawan Eiamphungporn
  • Skorn Mongkolsuk
Article

Abstract

Physiological adaptive and cross-protection responses to oxidants were investigated in Agrobacterium tumefaciens. Exposure of A. tumefaciens to sublethal concentrations of H2O2 induced adaptive protection to lethal concentrations of H2O2. Similar treatments with organic peroxide and menadione did not produce adaptive protection to subsequent exposure to lethal concentrations of these oxidants. Pretreatment of A. tumefaciens with an inducing concentration of menadione conferred cross-protection against H2O2, but not to tert-butyl hydroperoxide (tBOOH), killing. The menadione induced cross-protection to H2O2 was due to the compound’s ability to highly induce the peroxide scavenging enzyme, catalase. The levels of catalase directly correlated with the bacterium’s ability to survive H2O2 treatment. Some aspects of the oxidative stress response of A. tumefaciens differ from other bacteria, and these differences may be important in plant/microbe interactions.

Keywords

Catalase Hydroperoxide Agrobacterium Agrobacterium Tumefaciens Menadione 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag New York Inc. 2003

Authors and Affiliations

  • Paiboon Vattanaviboon
    • 1
  • Warawan Eiamphungporn
    • 2
  • Skorn Mongkolsuk
    • 1
  1. 1.Laboratory of Biotechnology, Chulabhorn Research Institute, Lak Si, Bangkok 10210, ThailandTH
  2. 2.Department of Biotechnology, Faculty of Science, Mahidol University, Bangkok 10400, ThailandTH

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