Soil acidification amendments change the rhizosphere bacterial community of tobacco in a bacterial wilt affected field

Shen, Guihua; Zhang, Shuting; Liu, Xiaojiao; Jiang, Qipeng; Ding, Wei

doi:10.1007/s00253-018-9347-0

Cited by 88 publications

(56 citation statements)

References 59 publications

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“…At phylum level, Picual was always characterized by a higher relative abundance of Candidatus Saccharibacteria, both in the rhizosphere and the endosphere and in the structural (DNA) and the functional (RNA) communities, and in contrast to Frantoio plants that showed more abundance in Proteobacteria. Candidatus Saccharibacteria, formerly known as Candidate Division TM7, was recently suggested as a key biomarker in bacterial wilt disease suppression to indicate a state of malady and stress for the plant [34]. This study showed a negative correlation between the relative abundances of Candidatus Saccharibacteria and R. solanacearum in tobacco plants.…”

Section: Discussionmentioning

confidence: 62%

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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Section: Discussionmentioning

confidence: 62%

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

et al. 2020

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“…Previous studies have compared the microbial species abundance and diversity of bacterial wilt disease outbreak in soil samples [16][17][18]. Here, the microbial relative abundances and diversities of SS and CS were (Figs.…”

Section: Discussionmentioning

confidence: 99%

Comparison of bacterial communities in soil samples with and without tomato bacterial wilt caused by Ralstonia solanacearum species complex

Zhang

Zhou

et al. 2020

BMC Microbiol

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Background: Ralstonia solanacearum is one of the most notorious soil-borne phytopathogens. It causes a severe wilt disease with deadly effects on many economically important crops. The microbita of disease-suppressive soils are thought that they can contribute to the disease resistance of crop plants, thus, evaluation of the microbial community and their interaction characteristics between suppressive soil (SS) and conducive soil (CS) will help to understand resistance mechanism. To do this, the bacterial community structure, correlation analysis with soil chemical properties, interaction network of SS (nearly no disease in three years), and CS (suffered heavy bacterial wilt disease) were analyzed. Results: A higher bacterial community diversity index was found in SS, the relative abundance of Nocardioides, Gaiella and norank_f_Anaerolineaceae were significantly more than that of the CS. Moreover, the relative abundance of main genera Bacillus, norank_o_Gaiellales, Roseiflexus, and norank_o_Gemmatimonadaceae were significantly more than that of the CS. Redundancy analysis at the genus level indicated that the available phosphate played a key role in the bacterial community distribution, and its role was negatively correlated with soil pH, organic matter content, alkali-hydrolyzable nitrogen, and available potassium contents. Interaction network analysis further demonstrated that greater diversity at the genus level existed in the SS network and formed a stable network. Additionally, the species of Mycobacterium, Cyanobacteria, and Rhodobiaceae are the key components that sustain the network stability. Seven clusters of orthologous groups exhibited significant differences between SS and CS. Moreover, 55 bacterial strains with distinct antagonistic activities to R. solancearum were isolated and identified from the healthy tomato plant rhizosphere soil of the CS. Conclusions: Our findings indicate that the bacterial diversity and interaction network differed between the CS and SS samples, providing a good foundation in the study of bacterial wilt.

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“…Studies have reported that Pseudomonas also has a good inhibitory effect on RKNs (Siddiqui et al 2002). Notably, the analysis of soil microorganisms related to disease occurrence should target one or several specific types and be directed to the interaction among soil microbial communities (Shen et al 2018).…”

Section: Discussionmentioning

confidence: 99%

Exploring the key microbial changes in the rhizosphere that affect the occurrence of tobacco root-knot nematodes

et al. 2020

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Root-knot nematode (RKN) disease is a soil-borne disease. However, most studies on RKN have focused on the screening of agents and the cultivation of resistant varieties, and reports on the interaction of RKNs with soil microorganisms are few. In this study, we performed Illumina high-throughput sequencing to analyze diseased and healthy soil and the microbial-community changes in rhizosphere soil after microbial treatment (Pseudomonas flurescens, Bacillus subtilis, Paecolomyces lilacinus). Results showed significant differences in the bacterial community richness and diversity between diseased and healthy soil and the presence of different microbial species. After treatment, the richness and diversity of microbial communities in soil, as well as the number and incidence of second-stage juvenile of RKNs, decreased. Through linear discriminant analysis effect size, Pearson correlation, and Venn diagram analysis, we screened five genera that were closely related to disease occurrence, among which Pseudomonas was most related to disease inhibition. Our results suggested that the occurrence of tobacco RKN was related to changes in soil microbial communities, and that the interactions among Pseudomonas, Bryobacter, Variibacter, Coniochaeta, and Metarhizium affected the health of rhizosphere soil.

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Soil acidification amendments change the rhizosphere bacterial community of tobacco in a bacterial wilt affected field

Cited by 88 publications

References 59 publications

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

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

Comparison of bacterial communities in soil samples with and without tomato bacterial wilt caused by Ralstonia solanacearum species complex

Exploring the key microbial changes in the rhizosphere that affect the occurrence of tobacco root-knot nematodes

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