Identification of traits shared by rhizosphere-competent strains of fluorescent pseudomonads

Autor: Fabrice Dessaint, Jos M. Raaijmakers, Jean-Marie Meyer, Thérèse Corberand, Yves Dessaux, Sylvie Mazurier, Philippe Lemanceau, Sandrine Ghirardi
Přispěvatelé: Institut National de la Recherche Agronomique (INRA), Agroécologie [Dijon], Institut National de la Recherche Agronomique (INRA)-Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, Wageningen University and Research Centre (WUR), Université de Strasbourg (UNISTRA), Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2012
Předmět:
fusarium-wilt
Denitrification
[SDV]Life Sciences [q-bio]
Population
Soil Science
phenazine antibiotics
Pseudomonas fluorescens
Plant Roots
disease suppressiveness
Microbial ecology
4-Butyrolactone
Solanum lycopersicum
Pseudomonas
take-all
Botany
[SDV.BV]Life Sciences [q-bio]/Vegetal Biology
Colonization
education
Ecology
Evolution
Behavior and Systematics
Soil Microbiology
all decline soils
Rhizosphere
education.field_of_study
Ecology
biology
EPS-2
biological-control
rhizosphere-competent strains
Phenotypic trait
Take-all
biology.organism_classification
gene-expression
Fusarium wilt
Anti-Bacterial Agents
Laboratorium voor Phytopathologie
Phenotype
plant-growth
[SDE]Environmental Sciences
Laboratory of Phytopathology
identification
Phenazines
Fluorescent Pseudomonads
root colonization
nonpathogenic fusarium
Zdroj: Microbial Ecology, 64(3), 725-737
Microbial Ecology
Microbial Ecology, Springer Verlag, 2012, 64 (3), pp.725-737. ⟨10.1007/s00248-012-0065-3⟩
Microbial Ecology 64 (2012) 3
ISSN: 0095-3628
1432-184X
DOI: 10.1007/s00248-012-0065-3⟩
Popis: SPE EA Ecoldur CT3 Enjeu2 S. Ghirardi : ancienne thèsarde de l'UMR 1229 MSE, n'a jmas intégré l'UMR 1347 Agroécologie (mais sur PDF 1347 !) T. Corberand : ancien agent de l'UMR 1229 MSE, n'a jmas intégré l'UMR 1347 Agroécologie (mais sur PDF 1347 !); Rhizosphere competence of fluorescent pseudomonads is a prerequisite for the expression of their beneficial effects on plant growth and health. To date, knowledge on bacterial traits involved in rhizosphere competence is fragmented and derived mostly from studies with model strains. Here, a population approach was taken by investigating a representative collection of 23 Pseudomonas species and strains from different origins for their ability to colonize the rhizosphere of tomato plants grown in natural soil. Rhizosphere competence of these strains was related to phenotypic traits including: (1) their carbon and energetic metabolism represented by the ability to use a wide range of organic compounds, as electron donors, and iron and nitrogen oxides, as electron acceptors, and (2) their ability to produce antibiotic compounds and N-acylhomoserine lactones (N-AHSL). All these data including origin of the strains (soil/rhizosphere), taxonomic identification, phenotypic cluster based on catabolic profiles, nitrogen dissimilating ability, siderovars, susceptibility to iron starvation, antibiotic and N-AHSL production, and rhizosphere competence were submitted to multiple correspondence analyses. Colonization assays revealed a significant diversity in rhizosphere competence with survival rates ranging from approximately 0.1 % to 61 %. Multiple correspondence analyses indicated that rhizosphere competence was associated with siderophore-mediated iron acquisition, substrate utilization, and denitrification. However, the catabolic profile of one rhizosphere-competent strain differed from the others and its competence was associated with its ability to produce antibiotics phenazines and N-AHSL. Taken together, these data suggest that competitive strains have developed two types of strategies to survive in the rhizosphere.
Databáze: OpenAIRE
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