An Integrated Insight into the Relationship between Soil Microbial Community and Tobacco Bacterial Wilt Disease

Heng, Yang; Li, Juan; Xiao, Yunhua; Gu, Yanling; Liu, Hongwei; Liang, Yili; Liu, Xueduan; Hu, Jin; Meng, Delong; Yin, Huaqun

doi:10.3389/fmicb.2017.02179

Cited by 113 publications

(68 citation statements)

References 65 publications

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“…Shi et al 69 observed that microbial diversity decreased as network size and connectivity increased, which resulted in an increased community organisation. It has also been shown that more complex networks are able to cope with environmental changes 76 , increase crop productivity 73 or suppress soil borne pathogen infection on plants 77 . Indeed, semi-dwarf wheat cultivars carrying Rht alleles were previously shown to be more susceptible than wild cultivars to initial infection by some pathogens 78,79 .…”

Section: Resultsmentioning

confidence: 99%

Wheat dwarfing influences selection of the rhizosphere microbiome

Kavamura

Robinson

Hughes

et al. 2020

Sci Rep

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The development of dwarf wheat cultivars combined with high levels of agrochemical inputs during the green revolution resulted in high yielding cropping systems. However, changes in wheat cultivars were made without considering impacts on plant and soil microbe interactions. We studied the effect of these changes on root traits and on the assembly of rhizosphere bacterial communities by comparing eight wheat cultivars ranging from tall to semi-dwarf plants grown under field conditions. Wheat breeding influenced root diameter and specific root length (SRL). Rhizosphere bacterial communities from tall cultivars were distinct from those associated with semi-dwarf cultivars, with higher differential abundance of Actinobacteria, Bacteroidetes and Proteobacteria in tall cultivars, compared with a higher differential abundance of Verrucomicrobia, Planctomycetes and Acidobacteria in semi-dwarf cultivars. Predicted microbial functions were also impacted and network analysis revealed a greater level of connectedness between microbial communities in the tall cultivars relative to semi-dwarf cultivars. Taken together, results suggest that the development of semi-dwarf plants might have affected the ability of plants to recruit and sustain a complex bacterial community network in the rhizosphere.

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Section: Resultsmentioning

confidence: 99%

Wheat dwarfing influences selection of the rhizosphere microbiome

Kavamura

Robinson

Hughes

et al. 2020

Sci Rep

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“…Indeed, complex networks contribute to better cope with environmental changes or to suppress soilborne pathogens. For instance, tobacco plants associated with rhizosphere microbial communities exhibiting complex networks showed lower incidence of bacterial wilt disease compared to plants associated with communities displaying less connections in their networks [29]. Also, in Brassica napus L. seeds microbiome, tightly-knit and complex microbial networks have been observed and proposed as traits that make the invasion by newcomers (either beneficial or pathogenic) of these niches difficult [55].…”

Section: Discussionmentioning

confidence: 99%

“…3). Co-occurrence interaction studies have been mainly focused on rhizosphere and phyllosphere microhabitats [29,30]. To the best of our knowledge, we have implemented for the first time this approach to assess a root endosphere community and the topological modifications occurring in this microhabitat upon the introduction of a soilborne pathogen.…”

Section: Discussionmentioning

confidence: 99%

“…Within these communities, microorganisms can engage a large variety of relationships: positive (e.g., cooperating to build up a biofilm that confers antibiotic resistance to its members [26]), negative (e.g., antibiosis or competition for resources [27]), or neutral [26]. The in-depth analyses of associations established among microorganisms may help to identify their environmental niches, reveal their functional roles within communities [28,29] and determine the ecosystem functioning/stability [30].…”

Section: Introductionmentioning

confidence: 99%

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Linking belowground microbial network changes to different tolerance level towards Verticillium wilt of olive

et al. 2020

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Background: Verticillium wilt of olive (VWO) is caused by the soilborne fungal pathogen Verticillium dahliae. One of the best VWO management measures is the use of tolerant/resistant olive cultivars. Knowledge on the oliveassociated microbiome and its potential relationship with tolerance to biotic constraints is almost null. The aims of this work are (1) to describe the structure, functionality, and co-occurrence interactions of the belowground (root endosphere and rhizosphere) microbial communities of two olive cultivars qualified as tolerant (Frantoio) and susceptible (Picual) to VWO, and (2) to assess whether these communities contribute to their differential disease susceptibility level. Results: Minor differences in alpha and beta diversities of root-associated microbiota were detected between olive cultivars regardless of whether they were inoculated or not with the defoliating pathotype of V. dahliae. Nevertheless, significant differences were found in taxonomic composition of non-inoculated plants' communities, "Frantoio" showing a higher abundance of beneficial genera in contrast to "Picual" that exhibited major abundance of potential deleterious genera. Upon inoculation with V. dahliae, significant changes at taxonomic level were found mostly in Picual plants. Relevant topological alterations were observed in microbial communities' co-occurrence interactions after inoculation, both at structural and functional level, and in the positive/negative edges ratio. In the root endosphere, Frantoio communities switched to highly connected and low modularized networks, while Picual communities showed a sharply different behavior. In the rhizosphere, V. dahliae only irrupted in the microbial networks of Picual plants. Conclusions: The belowground microbial communities of the two olive cultivars are very similar and pathogen introduction did not provoke significant alterations in their structure and functionality. However, notable differences were found in their networks in response to the inoculation. This phenomenon was more evident in the root endosphere communities. Thus, a correlation between modifications in the microbial networks of this microhabitat and susceptibility/tolerance to a soilborne pathogen was found. Moreover, V. dahliae irruption in the Picual microbial networks suggests a stronger impact on the belowground microbial communities of this cultivar upon inoculation. Our results suggest that changes in the co-occurrence interactions may explain, at least partially, the differential VWO susceptibility of the tested olive cultivars.

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“…Actinobacteria phylum, which although were not abundant in the communities, had an important role 475 within co-occurence networks. Phylum Actinobacteria was found previoulsy as a key taxon on 476 bacterial soil networks, where it could reduce the chance of soil plant pathogen invasion for tobacco 477 bacterial wilt disease (Yang et al 2017b). The decrease of connectivity values has also been observed 478 on soil bacterial communities due to land use, where higher density of links were found in natural 479 forest soils than pasture or field and plantations soils (Lupatini et al 2014), so that maize addition 480 could be considered as a strong perturbaction of soil microbial co-occurrence networks.…”

Section: Discussion 397mentioning

confidence: 99%

Maize residues changes soil fungal composition and decrease soil microbial co-ocurrence networks complexity

Cobo‐Díaz

Legrand

Floch

et al. 2019

Preprint

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14Fusarium graminearum (Fg) can cause different diseases in cereals and maize crops worldwide, and a 15 correct management of previous crop residues could decrease disease incidence and/or severity. 16Bacterial, fungal and Fusarium communities were studied by metabarcoding approach in 8 agricultural 17 fields with wheat-maize rotation system in Brittany, France, during three years. Additionally, shift in 18 microbial communities were evaluated under mesocosm experiments in soils amended or not with 19 maize residues and/or Fg isolate. Bacterial communities composition were highly influenced by crop 20 soil origin in both environmental and mesocosm soils, while bacteria co-occurrence network 21 genera, previously reported as efficient biocontrol agents versus Fusarium spp. Moreover, a decrease of 31 complexity was observed for soil bacterial and bacterial-fungal networks due to maize addition in both 32 environmental and mesocoms communities. 33 34

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An Integrated Insight into the Relationship between Soil Microbial Community and Tobacco Bacterial Wilt Disease

Cited by 113 publications

References 65 publications

Wheat dwarfing influences selection of the rhizosphere microbiome

Wheat dwarfing influences selection of the rhizosphere microbiome

Linking belowground microbial network changes to different tolerance level towards Verticillium wilt of olive

Maize residues changes soil fungal composition and decrease soil microbial co-ocurrence networks complexity

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