Signal transduction in plant-beneficial rhizobacteria with biocontrol properties.

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Serval ID
serval:BIB_EBBA7D1227A1
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
Signal transduction in plant-beneficial rhizobacteria with biocontrol properties.
Journal
Antonie Van Leeuwenhoek
Author(s)
Haas D., Keel C., Reimmann C.
ISSN
0003-6072 (Print)
ISSN-L
0003-6072
Publication state
Published
Issued date
2002
Volume
81
Number
1-4
Pages
385-395
Language
english
Abstract
Biological control of root pathogens--mostly fungi--can be achieved by the introduction of selected bacterial inoculants acting as 'biopesticides'. Successful inoculants have been identified among Gram-negative and Gram-positive bacteria, often belonging to Pseudomonas spp. and Bacillus spp., respectively. Biocontrol activity of a model rhizobacterium, P. fluorescens CHAO, depends to a considerable extent on the synthesis of extracellular antimicrobial secondary metabolites and exoenzymes, thought to antagonize the pathogenicity of a variety of phytopathogenic fungi. The regulation of exoproduct formation in P. fluorescens (as well as in other bacteria) depends essentially on the GacS/GacA two-component system, which activates a largely unknown signal transduction pathway. However, recent evidence indicates that GacS/GacA control has a major impact on target gene expression at a post-transcriptional level, involving an mRNA target sequence (typically near the ribosome binding site), two RNA binding proteins (designated RsmA and RsmE), and a regulatory RNA (RsmZ) capable of binding RsmA. The expression and activity of the regulatory system is stimulated by at least one low-molecular-weight signal. The timing and specificity of this switch from primary to secondary metabolism are essential for effective biocontrol.
Keywords
Antibiosis, Bacterial Proteins/genetics, Bacterial Proteins/metabolism, Fungi/growth & development, Pest Control, Biological, Plant Diseases/microbiology, Plant Roots/microbiology, Pseudomonas fluorescens/growth & development, Pseudomonas fluorescens/metabolism, Signal Transduction
Pubmed
Web of science
Open Access
Yes
Create date
24/01/2008 13:51
Last modification date
01/10/2019 6:20
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