Dialogues of root-colonizing biocontrol pseudomonads

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Serval ID
serval:BIB_4CAA1824972E
Type
Article: article from journal or magazin.
Publication sub-type
Review (review): journal as complete as possible of one specific subject, written based on exhaustive analyses from published work.
Collection
Publications
Institution
Title
Dialogues of root-colonizing biocontrol pseudomonads
Journal
European Journal of Plant Pathology
Author(s)
Dubuis C., Keel C., Haas D.
ISSN
0929-1873
Publication state
Published
Issued date
2007
Peer-reviewed
Oui
Volume
119
Number
3
Pages
311-328
Language
english
Abstract
Among biocontrol agents that are able to suppress root diseases caused by fungal pathogens, root-colonizing fluorescent pseudomonads have received particular attention because many strains of these bacteria trigger systemic resistance in host plants and produce antifungal compounds and exoenzymes. In general, the expression of these plant-beneficial traits is regulated by autoinduction mechanisms and may occur on roots when the pseudomonads form microcolonies. Three major classes of antibiotic compounds reviewed here in detail (2,4-diacetylphloroglucinol, pyoluteorin and various phenazine compounds) are all produced under cell population density-dependent autoinduction control acting at transcriptional and post-transcriptional levels. This regulation can either be reinforced or attenuated by a variety of chemical signals emanating from the pseudomonads themselves, other microorganisms or root exudates. Signals stimulating biocontrol factor expression via the Gac/Rsm signal transduction pathway in the biocontrol strain Pseudomonas fluorescens CHA0 are synthesized by many different plant-associated bacteria, warranting a more detailed investigation in the future.
Keywords
antibiotic compounds, biocontrol, GacS/GacA, quorum sensing, Pseudomonas, rhizosphere
Web of science
Open Access
Yes
Create date
17/02/2008 13:22
Last modification date
01/10/2019 7:17
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