Evidence Against a Direct Antimicrobial Role of H2O2 in the Infection of Plants by Erwinia chrysanthemi

Miguel, Eugenio and Poza Carrion, Cesar and Lopez Solanilla, Emilia and Aguilar, Isabel and Llama Palacios, María Aránzazu and García Olmedo, Francisco and Rodriguez Palenzuela, Pablo (2000). Evidence Against a Direct Antimicrobial Role of H2O2 in the Infection of Plants by Erwinia chrysanthemi. "Molecular Plant-Microbe Interactions", v. 13 (n. 4); pp. 421-429. ISSN 0894-0282.

Description

Title: Evidence Against a Direct Antimicrobial Role of H2O2 in the Infection of Plants by Erwinia chrysanthemi
Author/s:
  • Miguel, Eugenio
  • Poza Carrion, Cesar
  • Lopez Solanilla, Emilia
  • Aguilar, Isabel
  • Llama Palacios, María Aránzazu
  • García Olmedo, Francisco
  • Rodriguez Palenzuela, Pablo
Item Type: Article
Título de Revista/Publicación: Molecular Plant-Microbe Interactions
Date: April 2000
ISSN: 0894-0282
Volume: 13
Subjects:
Freetext Keywords: active oxygen species, phytopathogenic bacteria
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Biotecnologia [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

We have investigated the role of bacterial resistance to oxidative stress in pathogenesis. The oxyR gene from the pathogenic bacterium Erwinia chrysanthemi has been characterized. It is closely related to that found in Escherichia coli (88% overall amino acid identity). An E. chrysanthemi oxyR mutant strain was constructed by marker exchange. After induction with a sublethal dose of H2O2, this mutant was more sensitive to H2O2 and showed reduced levels of catalase and glutathione reductase activities, compared with the wild type. The oxyR mutant was unable to form individual colonies on agar plates unless catalase was added exogenously. However, it retained full virulence in potato tubers and tobacco leaves. These results suggest that the host-produced H2O2 has no direct antimicrobial effect on the interaction of E. chrysanthemi with the two plant species.

More information

Item ID: 5833
DC Identifier: http://oa.upm.es/5833/
OAI Identifier: oai:oa.upm.es:5833
Official URL: http://apsjournals.apsnet.org/loi/mpmi
Deposited by: Memoria Investigacion
Deposited on: 01 Feb 2011 09:21
Last Modified: 20 Apr 2016 14:32
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