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Title: Genes for hydrogen peroxide detoxification and adaptation contribute to protection against heat shock in Xanthomonas campestrispv. campestris
Authors: Sarinya Buranajitpakorn
Anong Piwkam
Nisanart Charoenlap
Paiboon Vattanaviboon
Skorn Mongkolsuk
Chulabhorn Research Institute
Chulabhorn Graduate Institute
Center of Excellence on Environmental Health
Mahidol University
Keywords: Biochemistry, Genetics and Molecular Biology;Immunology and Microbiology
Issue Date: 1-Apr-2011
Citation: FEMS Microbiology Letters. Vol.317, No.1 (2011), 60-66
Abstract: Xanthomonas campestris pv. campestris, a soil-borne plant-pathogenic bacterium, is exposed to multiple stresses in the environment and during interaction with a host plant. The roles of hydrogen peroxide (H 2 O 2 )-protective genes (katA, katG, and ahpC) and a peroxide sensor/transcription regulator (oxyR) in the viability of X. campestris pv. campestris at an elevated temperature were evaluated. The single katA and katG mutants showed moderate decreased survival after the heat treatment, while the double katA-katG and oxyR mutants were the most vulnerable to the heat treatment compared with a wild-type strain. However, ahpC provided no protective function against the heat treatment. Flow cytometric analysis revealed an increased accumulation of peroxide in cells treated with heat. Altogether, the data revealed a crucial role of genes in the H 2 O 2 detoxification system for protection against lethal heat shock in X. campestris pv. campestris. © 2011 Federation of European Microbiological Societies.
ISSN: 15746968
Appears in Collections:Scopus 2011-2015

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