Involvement of three pathogenicity factors of Erwinia amylovora in the oxidative stress associated with compatible interaction in pear

Erwinia amylovora, the causal agent of fire blight of Maloideae, induces in its susceptible host plants an oxidative burst as does an incompatible pathogen. In this paper we present evidence that the elicitation of this phenomenon is the result of the combined action of two Hrp effectors of the bact...

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Bibliographic Details
Published in:FEBS letters 2003-02, Vol.537 (1-3), p.198-202
Main Authors: Venisse, Jean-Stéphane, Barny, Marie-Anne, Paulin, Jean-Pierre, Brisset, Marie-Noëlle
Format: Article
Language:English
Subjects:
Capsule
Cellular Biology
Desferrioxamine
DspA protein
Erwinia - classification
Erwinia - growth & development
Erwinia - pathogenicity
Erwinia amylovora
Fruit - microbiology
Hrp effector
HrpN protein
hydrogen peroxide
Hydrogen Peroxide - metabolism
Life Sciences
Oxidative burst
oxidative stress
Oxidative Stress - physiology
pathogenicity
Plant Diseases - microbiology
Pyrus communis
Rosaceae - microbiology
Rosaceae - physiology
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Summary:Erwinia amylovora, the causal agent of fire blight of Maloideae, induces in its susceptible host plants an oxidative burst as does an incompatible pathogen. In this paper we present evidence that the elicitation of this phenomenon is the result of the combined action of two Hrp effectors of the bacteria, HrpN and DspA. We also confirmed that desferrioxamine, the siderophore of E. amylovora, is necessary for the bacteria to tolerate high levels of hydrogen peroxide. Two other pathogenicity factors of the bacteria, the HrpW effector and the capsule, do not seem to play any role in the elicitation of the oxidative burst nor in the protection of the bacteria.
ISSN:0014-5793
1873-3468
DOI:10.1016/S0014-5793(03)00123-6