Pseudomonas and other Microbes in Disease-Suppressive Soils

Kyselková, Martina; Moënne‐Loccoz, Yvan

doi:10.1007/978-94-007-4113-3_5

Cited by 32 publications

(26 citation statements)

References 286 publications

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“…Phl+ pseudomonads are considered of particular importance for black root rot suppression (Kyselková and Moënne‐Loccoz, ). Here, real‐time PCR indicated that the abundance of phlD genes varied between approximately 10 3 and 10 6 gene copies per gram rhizosphere soil depending on individual plants.…”

Section: Resultsmentioning

confidence: 99%

“…Understanding and predicting disease‐suppressiveness status of soils is therefore of interest from the point of view of soil quality and crop production (Janvier et al ., ). The occurrence of soils specifically suppressive to a plant pathogen has been reported worldwide (Kyselková and Moënne‐Loccoz, ), and two types of disease suppressiveness have been recognized. In some pathosystems (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…The objective of this study was to determine whether 16S rRNA bacterial indicator probes identified in the greenhouse (Kyselková et al ., ) would be useful for in‐field prediction of black root rot suppressiveness status. Considering the importance of Phl+ pseudomonads for black root rot suppression (Kyselková and Moënne‐Loccoz, ), we also carried out a more detailed assessment of Phl+ Pseudomonas populations based on the abundance of phlD genes (rather than counts of Phl+ pseudomonads as done so far). To this end, tobacco and wheat were collected in 2004 and/or 2006 at Morens, in farmers' fields of contrasted black root rot suppressiveness status, and DNA was extracted from the rhizophere samples.…”

Section: Introductionmentioning

confidence: 99%

“…In disease-suppressive soils, plants may be protected from phytopathogen(s) by certain indigenous microorganisms (Raaijmakers and Weller, 1998;Kyselková and Moënne-Loccoz, 2012). Understanding and predicting disease-suppressiveness status of soils is therefore of interest from the point of view of soil quality and crop production (Janvier et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of rhizobacterial indicators of tobacco black root rot suppressiveness in farmers' fields

Kyselková

Almario

Kopecký

et al. 2014

Environ Microbiol Rep

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Very few soil quality indicators include disease-suppressiveness criteria. We assessed whether 64 16S rRNA microarray probes whose signals correlated with tobacco black root rot suppressiveness in greenhouse analysis could also discriminate suppressive from conducive soils under field conditions. Rhizobacterial communities of tobacco and wheat sampled in 2 years from four farmers' fields of contrasted suppressiveness status were compared. The 64 previously identified indicator probes correctly classified 72% of 29 field samples, with nine probes for Azospirillum, Gluconacetobacter, Sphingomonadaceae, Planctomycetes, Mycoplasma, Lactobacillus crispatus and Thermodesulforhabdus providing the best prediction. The whole probe set (1033 probes) revealed strong effects of plant, field location and year on rhizobacterial community composition, and a smaller (7% variance) but significant effect of soil suppressiveness status. Seventeen additional probes correlating with suppressiveness status in the field (noticeably for Agrobacterium, Methylobacterium, Ochrobactrum) were selected, and combined with the nine others, they improved correct sample classification from 72% to 79% (100% tobacco and 63% wheat samples). Pseudomonas probes were not informative in the field, even those targeting biocontrol pseudomonads producing 2,4-diacetylphloroglucinol, nor was quantitative polymerase chain reaction for 2,4-diacetylphloroglucinol-synthesis gene phlD. This study shows that a subset of 16S rRNA probes targeting diverse rhizobacteria can be useful as suppressiveness indicators under field conditions.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evaluation of rhizobacterial indicators of tobacco black root rot suppressiveness in farmers' fields

Kyselková

Almario

Kopecký

et al. 2014

Environ Microbiol Rep

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“…A third possibility is that some of the discriminant taxa could have positive effects directly on tobacco health. This is substantiated by the fact that many of the taxa more prevalent in Morens suppressive soil contain strains with biocontrol and/or plant growth promotion potential (Kyselková et al ., ; Kyselková and Moënne‐Loccoz, ). Indeed, microbial consortia consisting of representative strains from these taxa were effective at improving growth of rice (i.e.…”

Section: Rhizobacterial Community and Black Root Rot Suppressivenessmentioning

confidence: 99%

Rhizosphere ecology and phytoprotection in soils naturally suppressive to Thielaviopsis black root rot of tobacco

Almario

Müller

Défago

et al. 2014

Environmental Microbiology

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SummarySoil suppressiveness to disease is an intriguing emerging property in agroecosystems, with important implications because it enables significant protection of susceptible plants from soil-borne pathogens. Unlike many soils where disease suppressiveness requires crop monoculture to establish, certain soils are naturally suppressive to disease, and this type of specific disease suppressiveness is maintained despite crop rotation. Soils naturally suppressive to Thielaviopsis basicola-mediated black root rot of tobacco and other crops occur in Morens region (Switzerland) and have been studied for over 30 years. In Morens, vermiculite-rich suppressive soils formed on morainic deposits while illite-rich conducive soils developed on sandstone, but suppressiveness is of microbial origin. Antagonistic pseudomonads play a role in black root rot suppressiveness, including Pseudomonas protegens (formerly P. fluorescens) CHA0, a major model strain for research. However, other types of rhizobacterial taxa may differ in prevalence between suppressive and conducive soils, suggesting that the microbial basis of black root rot suppressiveness could be far more complex than solely a Pseudomonas property. This first review on black root rot suppressive soils covers early findings on these soils, the significance of recent results, and compares them with other types of suppressive soils in terms of rhizosphere ecology and plant protection mechanisms.

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Fungal Genes and Metabolites Associated with the Biocontrol of Soil-borne Plant Pathogenic Fungi

Daguerre¹,

Edel-Hermann²,

Steinberg³

2016

Fungal Metabolites

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Pseudomonas and other Microbes in Disease-Suppressive Soils

Cited by 32 publications

References 286 publications

Evaluation of rhizobacterial indicators of tobacco black root rot suppressiveness in farmers' fields

Evaluation of rhizobacterial indicators of tobacco black root rot suppressiveness in farmers' fields

Rhizosphere ecology and phytoprotection in soils naturally suppressive to Thielaviopsis black root rot of tobacco

Fungal Genes and Metabolites Associated with the Biocontrol of Soil-borne Plant Pathogenic Fungi

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