Potential Role of Pathogen Signaling in Multitrophic Plant-Microbe Interactions Involved in Disease Protection / (Record no. 45877)

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fixed length control field 02594nma a2200265 4500
008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION
fixed length control field 2004 eng
022 ## - INTERNATIONAL STANDARD SERIAL NUMBER
ISSN 1098-5336
040 ## - CATALOGING SOURCE
Transcribing agency Sonoma County Wine Library
041 ## -
-- eng
100 0# - MAIN ENTRY--PERSONAL NAME
Personal name Brion Duffy.
245 10 - TITLE STATEMENT
Title Potential Role of Pathogen Signaling in Multitrophic Plant-Microbe Interactions Involved in Disease Protection /
Statement of responsibility, etc by Brion Duffy; Christoph Keel; Geneviève Défago.
260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT)
Name of publisher, distributor, etc American Society for Microbiology,
Date of publication, distribution, etc 2004.
300 ## - PHYSICAL DESCRIPTION
Type Journal article
490 0# - JOURNAL TITLE
Title of the journal Applied and Environmental Microbiology
520 ## - ABSTRACT
Abstract Multitrophic interactions mediate the ability of fungal pathogens to cause plant disease and the ability of bacterial antagonists to suppress disease. Antibiotic production by antagonists, which contributes to disease suppression, is known to be modulated by abiotic and host plant environmental conditions. Here, we demonstrate that a pathogen metabolite functions as a negative signal for bacterial antibiotic biosynthesis, which can determine the relative importance of biological control mechanisms available to antagonists and which may also influence fungus-bacterium ecological interactions. We found that production of the polyketide antibiotic 2,4-diacetylphloroglucinol (DAPG) was the primary biocontrol mechanism of Pseudomonas fluorescens strain Q2-87 against Fusarium oxysporum f. sp. radicis-lycopersici on the tomato as determined with mutational analysis. In contrast, DAPG was not important for the less-disease-suppressive strain CHA0. This was explained by differential sensitivity of the bacteria to fusaric acid, a pathogen phyto- and mycotoxin that specifically blocked DAPG biosynthesis in strain CHA0 but not in strain Q2-87. In CHA0, hydrogen cyanide, a biocide not repressed by fusaric acid, played a more important role in disease suppression.
700 0# - ADDED ENTRY-PERSONAL NAME
PERSONAL NAME Geneviève Défago.
700 0# - ADDED ENTRY-PERSONAL NAME
PERSONAL NAME Christoph Keel.
710 2# - ADDED ENTRY-CORPORATE NAME
CORPORATE NAME Laboratoire de Biologie Microbienne, Université de Lausanne, CH-1015 Lausanne.
710 2# - ADDED ENTRY-CORPORATE NAME
CORPORATE NAME Swiss Federal Research Institute for Fruit Production, Viticulture and Horticulture, CH-8820 Wädenswil.
710 2# - ADDED ENTRY-CORPORATE NAME
CORPORATE NAME Institut für Pflanzenwissenschaften, Phytomedizin/Phytopathologie, Eidgenössiche Technische Hochschule, CH-8092 Zürich, Switzerland.
773 0# - SOURCE JOURNAL
Journal title Applied and Environmental Microbiology.
Related parts (Vol.) 70. (No.) 3. 2004. (Pages.) 1836-1842.
Page numbers 1836-1842
Volume number 70
856 42 - ELECTRONIC LOCATION & ACCESS
URI http://aem.asm.org/content/70/3/1836.abstract
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OAI set code AEM
OAI set name Applied and Environmental Microbiology
100 0# - MAIN ENTRY--PERSONAL NAME
-- 331742
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-- 331743
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-- 331744
710 2# - ADDED ENTRY-CORPORATE NAME
-- 331745
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-- 331746
710 2# - ADDED ENTRY-CORPORATE NAME
-- 331747
856 42 - ELECTRONIC LOCATION & ACCESS
-- Link to original article.

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