Diversity, detection and exploitation: linking soil fungi and plant disease

Bollmann-Giolai, Anita; Malone, Jacob G.; Arora, Sanu

doi:10.1016/j.mib.2022.102199

Cited by 27 publications

(13 citation statements)

References 51 publications

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Section: Discussionmentioning

confidence: 59%

“…Only the the relative abundance of potentially pathogenic OTUs did not changed with soil-origin richness. Despite this and the generally acknowledged positive effects of soil microbial diversity for plant health (Bollmann-Giolai et al, 2022; Garbeva et al, 2004), soil-origin richness did not significantly reduce foliar disease in the pot experiment. Focusing on symptoms specific to soilborne diseases might have revealed different patterns (Zhang et al, 2019), especially since we observed a lower proportion of potentially pathogenic OTUs at higher undersown richness.…”

Section: Discussionmentioning

confidence: 62%

“…The soil microbial community is an important driver of soil-mediated disease suppression. Diverse plant communities harbor diverse soil microbial communities, which can promote disease resistance in plants through the production of toxins and metabolites, by competitive exclusion of pathogens, by triggering systemic defenses in the hosts, or by improving plant health through increased stress resistance (Bollmann-Giolai et al, 2022; Garbeva et al, 2004). More diverse plant communities can host larger (Eisenhauer et al, 2010), more diverse (Maciá-Vicente et al, 2023) and more beneficial soil microbial communities (Stefan et al, 2021) than monocultures.…”

Section: Introductionmentioning

confidence: 99%

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The potential of undersown species identity vs. diversity to manage disease in crops

Cappelli,

Domeignoz Horta,

Gerin

et al. 2024

Preprint

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In the absence of chemical control with its negative side effects, fungal pathogens can cause large yield losses, requiring us to develop agroecosystems that are inherently disease resistant. Grassland biodiversity experiments often find plant species diversity to reduce pathogen pressure, but whether incorporating high biodiversity levels in agricultural fields have similar effects remains largely unknown.We tested if undersown plant species diversity could reduce barley disease, and whether the effect was mediated through above- or belowground mechanisms, by combining an agricultural field trial with a soil transplant experiment.As predicted, barley disease decreased in the presence of undersown plants. Undersown species richness had no effect, but their abundance led to early season disease reduction. Aboveground mechanisms underpinned this disease reduction. Barley yield slightly decreased with increasing undersown species richness, and undersown species varied in their impact on yield.We identified two undersown species with similar functional traits that contributed most to disease reduction and had the potential to increase barley yield. Furthermore, our results indicate that aboveground mechanisms caused this. We show that agroecosystem functioning can be improved without trade-offs on yield by targeted selection of undersown species.

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Section: Discussionmentioning

confidence: 59%

Section: Discussionmentioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

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The potential of undersown species identity vs. diversity to manage disease in crops

Cappelli,

Domeignoz Horta,

Gerin

et al. 2024

Preprint

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“…Bionectria spp. has been shown to decompose plant debris, improve rhizosphere soil health, and act as biological control agents against insect-pests [107], [112]. The volatile antimicrobial compounds produced by this fungus have been reported to suppress plant pathogens and could be used as an effective biofumigant [113], [114].…”

Section: Effect and Role Of Push-pull Cropping System On Soil And Mai...mentioning

confidence: 99%

Long-term Push-pull Cropping System Shifts Rhizosphere and Maize-root Microbiome Diversity Paving Way To Resilient Farming System

Jalloh,

Khamis,

Yusuf

et al. 2023

Preprint

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Background: The rhizosphere biota consists of a complex assembly of microbial communities and other organisms that vary significantly across farming systems and influence soil health and plant productivity. How different cropping systems manipulates soil and plant microbiomes is little understood. In this study, we investigated soil physicochemical properties, rhizosphere and maize-root microbiomes in an agroecological cereal-legume companion cropping system known as push-pull technology (PPT) which has been in use in farmer fields for over two decades for insect-pest management, soil health improvement, and weed control in sub-Saharan Africa. We compared this with the maize-monoculture (Mono) cropping system. Results: PPT cropping system positively impacted the abundance and diversity of soil and maize-root microbial communities and influenced soil physicochemical characteristics compared to Mono. Specific genera of both bacterial and fungal communities drove the variation in diversity of the microbial communities in these cropping systems. Soil and maize-root from the PPT cropping system had enriched Trichoderma, Mortierella, and Bionectria fungal genera while Streptomyces, RB41, and Nitrospira, among other bacterial genera linked to essential ecosystem services like plant protection, decomposition, carbon utilization, production of bioinsecticides, nitrogen fixation, nematode suppression, phytohormone production, and bioremediation. Bacterial from the genus Bryobacter linked to plant pathogenesis was more abundant in Mono-root. Similarly, fungal genera such as Gibberella, Neocosmospora, and Aspergillus, linked to plant pathogenesis and food contamination, were abundant in Mono. Notable differences were observed in the overall diversity of metabiome functional protein pathways, such as syringate degradation, L-methionine biosynthesis I, and inosine 5'-phosphate degradation. Conclusion: Push-pull cropping system improves soil physicochemical properties and shifts soil and maize-root microbiomes in farmer fields in favour of microbial communities involved in important ecological services. The current findings add to the diversification of ecosystem services provided by this cropping system where it is practiced and contributes to the system’s resilience and functional redundancy. Underpinning the mechanism through PPT affects the soil and maize-root microbial communities – whether it is through the influence of plant metabolites from the intercrop root exudates or is the alteration of the soil nutritional status which affects microbial enzymatic activities should be the future focus.

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“…In line with the concept of green and safe plant protection, probiotic microorganisms for plant disease control have the advantages of high efficacy, high ecological safety, and substantial economic benefits [15]. The utilization of biocontrol agents (BCAs) is one of the most effective alternatives for reducing chemical pesticides and improving sustainable agricultural production [16].…”

Section: Introductionmentioning

confidence: 99%

Effect of Rhizospheric Fungus on Biological Control of Root Rot (Fusarium equiseti) Disease of Saposhnikovia divaricata

Han

Cui²,

Wang³

et al. 2022

Agronomy

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Saposhnikovia divaricata is a high-demand medicinal plant containing various bioactive metabolites (e.g., chromone). However, root rot disease leads to a dramatic reduction in the yield and quality of S. divaricata. The use of rhizospheric microorganisms is one of the best strategies for biological control. In this study, a total of 104 fungi isolated from the rhizospheric soil of S. divaricata plants were examined for their different antifungal properties. Subsequently, strain MR-57 was selected as a potential stock for biocontrol due to its broad-spectrum antagonistic activity against pathogens, including F. equiseti. Based on the analysis of morphological properties and rDNA internal transcribed spacers (ITSs), strain MR-57 was identified as Acrophialophora jodhpurensis (GenBank No. OK287150.1), a newly recorded species for China. In an in vitro antifungal assay, the culture filtrate of strain MR-57 significantly reduced the conidial germination rate and induced alterations in the mycelia morphology of F. equiseti, such as deformation and degradation. To assess the antifungal efficacy of MR-57 against root rot disease and the properties promoting the growth of S. divaricata, pot experiments were performed under natural outdoor conditions. The results indicated that co-inoculation with MR-57 delayed the occurrence of S. divaricata root rot and showed a control efficacy of 65.41% (p < 0.05) based on the measurement of suppressed disease lesions. Additionally, MR-57 successfully colonized and formed a stable population in the soil in which S. divaricata was grown, and it exhibited a consistently positive effect on the promotion of the growth of S. divaricata plants. In short, Acr. jodhpurensis MR-57 could be considered for the development of a potential biocontrol agent for the management of S. divaricata root rot caused by F. equiseti.

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Diversity, detection and exploitation: linking soil fungi and plant disease

Cited by 27 publications

References 51 publications

The potential of undersown species identity vs. diversity to manage disease in crops

The potential of undersown species identity vs. diversity to manage disease in crops

Long-term Push-pull Cropping System Shifts Rhizosphere and Maize-root Microbiome Diversity Paving Way To Resilient Farming System

Effect of Rhizospheric Fungus on Biological Control of Root Rot (Fusarium equiseti) Disease of Saposhnikovia divaricata

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