Plant and soil-associated microbiome dynamics determine the fate of bacterial wilt pathogen Ralstonia solanacearum

Kashyap, Sampurna; Sharma, Indrani; Dowarah, Bhaskar; Barman, R P; Gill, Sarvajeet Singh; Agarwala, Niraj

doi:10.1007/s00425-023-04209-w

Cited by 5 publications

(4 citation statements)

References 106 publications

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“…This suggests that changes in soil pH directly affect the spread of BW disease among tomatoes. A recent review [102] explores microbial and non-microbial strategies for BW management in crop plants.…”

Section: Bacterial Wilt (Bw)mentioning

confidence: 99%

Microbiome-Mediated Strategies to Manage Major Soil-Borne Diseases of Tomato

Meshram,

Adhikari

2024

Plants

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The tomato (Solanum lycopersicum L.) is consumed globally as a fresh vegetable due to its high nutritional value and antioxidant properties. However, soil-borne diseases can severely limit tomato production. These diseases, such as bacterial wilt (BW), Fusarium wilt (FW), Verticillium wilt (VW), and root-knot nematodes (RKN), can significantly reduce the yield and quality of tomatoes. Using agrochemicals to combat these diseases can lead to chemical residues, pesticide resistance, and environmental pollution. Unfortunately, resistant varieties are not yet available. Therefore, we must find alternative strategies to protect tomatoes from these soil-borne diseases. One of the most promising solutions is harnessing microbial communities that can suppress disease and promote plant growth and immunity. Recent omics technologies and next-generation sequencing advances can help us develop microbiome-based strategies to mitigate tomato soil-borne diseases. This review emphasizes the importance of interdisciplinary approaches to understanding the utilization of beneficial microbiomes to mitigate soil-borne diseases and improve crop productivity.

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Section: Bacterial Wilt (Bw)mentioning

confidence: 99%

Microbiome-Mediated Strategies to Manage Major Soil-Borne Diseases of Tomato

Meshram,

Adhikari

2024

Plants

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“…As a result, sap ow can be partially or totally blocked, preventing water and nutrients from reaching the aerial part of the plant in su cient quantities (Zulaga et al 2022). In addition, as a defense mechanism, the plant reacts by forming tyloses (excessive growth of the protoplast), making it even more di cult for water to pass through (Kashyap et al 2023).…”

Section: Introductionmentioning

confidence: 99%

Identification of tomato cultivars resistant to Ralstonia pseudosolanacearum

Costa,

Varjão,

Silva

et al. 2024

Preprint

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The bacterium Ralstonia pseudosolanacearum is responsible for one of the main tomato diseases, bacterial wilt. The only effective control measure for this disease is the use of resistant cultivars. The aim of this study was to identify tomato cultivars resistant to Ralstonia pseudosolanacearum. The experiment was conducted in a greenhouse at the Federal Institute of Alagoas - Piranhas Campus. The experimental design used was entirely randomized in a factorial scheme (10 x 2), containing 10 tomato cultivars and two isolates of the species Ralstonia pseudosolanacearum, totaling 20 treatments in three replications, resulting in 60 experimental plots, each containing four plants. Using the diagrammatic scale of bacterial wilt scores, phytopathometry of the disease was carried out using the following variables: Incidence (INC), Bacterial Wilt Index (BWI), Disease Index (DI), Latency Period (LP50), Area Under the Disease Progress Curve (AUDPC) and Infection Rate (IR). These variables were obtained for the 5th − 10th and 15th − 20th day of evaluation. There was a significant interaction between Cultivars x Isolates for the following variables: BWI, AUDPC, IR (5th − 10th day of evaluation) and for BWI, DI and IR (15th − 20th day of evaluation). The variables LP50, INC, IR and AUDPC characterized the start of the bacterial wilt epidemic from the first evaluation interval, regardless of the cultivars and isolates. The cultivar Havaí 7996 was classified as resistant to the isolate CRMRs108, and the cultivar Bartô was classified as moderately resistant to both isolates.

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“…R. solanacearum can exist in the soil for several years, posing a continuous threat to plant health [ 13 ]. In recent decades, the incidence of bacterial wilt has increased due to long-term continuous monoculture cropping [ 14 ]. Previous studies have reported distinct community compositions of microorganisms between healthy and diseased plants, although they share similar environmental conditions [ 11 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

“…In recent decades, the incidence of bacterial wilt has increased due to long-term continuous monoculture cropping [ 14 ]. Previous studies have reported distinct community compositions of microorganisms between healthy and diseased plants, although they share similar environmental conditions [ 11 , 14 , 15 ]. Additionally, bacterial wilt significantly decreased microbial community diversity, resulting in reduced complexity and robustness of microbial networks [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Bacterial wilt affects the structure and assembly of microbial communities along the soil-root continuum

Liang,

Wei,

Song

et al. 2024

Environmental Microbiome

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Background Beneficial root-associated microbiomes play crucial roles in enhancing plant growth and suppressing pathogenic threats, and their application for defending against pathogens has garnered increasing attention. Nonetheless, the dynamics of microbiome assembly and defense mechanisms during pathogen invasion remain largely unknown. In this study, we aimed to investigate the diversity and assembly of microbial communities within four niches (bulk soils, rhizosphere, rhizoplane, and endosphere) under the influence of the bacterial plant pathogen Ralstonia solanacearum. Results Our results revealed that healthy tobacco plants exhibited more diverse community compositions and more robust co-occurrence networks in root-associated niches compared to diseased tobacco plants. Stochastic processes (dispersal limitation and drift), rather than determinism, dominated the assembly processes, with a higher impact of drift observed in diseased plants than in healthy ones. Furthermore, during the invasion of R. solanacearum, the abundance of Fusarium genera, a known potential pathogen of Fusarium wilt, significantly increased in diseased plants. Moreover, the response strategies of the microbiomes to pathogens in diseased and healthy plants diverged. Diseased microbiomes recruited beneficial microbial taxa, such as Streptomyces and Bacilli, to mount defenses against pathogens, with an increased presence of microbial taxa negatively correlated with the pathogen. Conversely, the potential defense strategies varied across niches in healthy plants, with significant enrichments of functional genes related to biofilm formation in the rhizoplane and antibiotic biosynthesis in the endosphere. Conclusion Our study revealed the varied community composition and assembly mechanism of microbial communities between healthy and diseased tobacco plants along the soil-root continuum, providing new insights into niche-specific defense mechanisms against pathogen invasions. These findings may underscore the potential utilization of different functional prebiotics to enhance plants’ ability to fend off pathogens.

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Plant and soil-associated microbiome dynamics determine the fate of bacterial wilt pathogen Ralstonia solanacearum

Cited by 5 publications

References 106 publications

Microbiome-Mediated Strategies to Manage Major Soil-Borne Diseases of Tomato

Microbiome-Mediated Strategies to Manage Major Soil-Borne Diseases of Tomato

Identification of tomato cultivars resistant to Ralstonia pseudosolanacearum

Bacterial wilt affects the structure and assembly of microbial communities along the soil-root continuum

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