Publication: Atypical adaptive and cross-protective responses against peroxide killing in a bacterial plant pathogen, Agrobacterium tumefaciens
Issued Date
2003-10-01
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ISSN
03438651
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2-s2.0-0041360456
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Mahidol University
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SCOPUS
Bibliographic Citation
Current Microbiology. Vol.47, No.4 (2003), 323-326
Suggested Citation
Paiboon Vattanaviboon, Warawan Eiamphungporn, Skorn Mongkolsuk Atypical adaptive and cross-protective responses against peroxide killing in a bacterial plant pathogen, Agrobacterium tumefaciens. Current Microbiology. Vol.47, No.4 (2003), 323-326. doi:10.1007/s00284-002-4011-3 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/20878
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Title
Atypical adaptive and cross-protective responses against peroxide killing in a bacterial plant pathogen, Agrobacterium tumefaciens
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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 H 2O2 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.