Biocontrol Agents Reduce Progression and Mycotoxin Production of Fusarium graminearum in Spikelets and Straws of Wheat

Pellan, Lucile; Dieye, Cheikh Ahmeth Tidiane; Durand, Noël; Fontana, Angélique; Schorr‐Galindo, Sabine; Strub, Caroline

doi:10.3390/toxins13090597

Cited by 6 publications

(4 citation statements)

References 41 publications

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“…induction of resistance and growth promotion (Rey et al, 2008). Pellan et al (2021) performed in vitro bioassay comparisons between F. graminearum and some BCAs including formulated P. oligandrum with use of detached spikelets of wheat. P. oligandrum was able to settle and colonize the lemma awn base palea and quickly produced a large quantity of characteristic oogonia containing oospores with no apparent symptoms on the spikelets (no loss of chlorophyll, necrosis, or desiccation) compared to those inoculated with F. graminearum.…”

Section: The Research Highlights and Agricultural Practicementioning

confidence: 99%

Control of malting barley Fusarium head blight by bioagents

Gazdík,

Vymětal,

Koprna

et al. 2023

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The routine and prophylactic use of fungicides in cereals leads to increased aggressiveness of Fusarium infections. Cross-resistance to triazole compounds represents a significant health risk to both plants and humans. The application of some widely used fungicides causes increased production of DON. Residual concentrations of hydrophobic triazoles change chemical profile of malt and cause delayed fermentation with an impact on alcohol content. Increasing legislative restrictions of pesticide applications encourage the search for alternatives, starting with the overview of current state of knowledge on biological protection against Fusarium spp. Despite the fact that bioagents have been researched intensively, including field applications and several registrations, biological preparations for disease control against Fusarium head blight (FHB) of malting barley are not used on a mass scale. Generally, bioagents appear to be quite sensitive to environmental changes and soil variability, which causes problems with the evaluation of their effectiveness under field conditions. For efficient disease control of malting barley, the application based on biopreparations registered against FHB combined with weather prediction system can be recommended. With an emphasis on the occurrence of Fusarium graminearum as a key producer of deoxynivalenol (DON), the prediction system for malting barley should be employed from plant emerging to milk stage. When predicting a high incidence of the pathogen, chemical intervention must be considered. However, repeated application of bioagents in field conditions together with the implementation of bioagents directly into the malting process proved to be a promising way to decrease chemical interventions from the cultivation of malting barley.

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Section: The Research Highlights and Agricultural Practicementioning

confidence: 99%

Control of malting barley Fusarium head blight by bioagents

Gazdík,

Vymětal,

Koprna

et al. 2023

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“…In recent years, biological control techniques have been widely applied to control plant pathogens. There are many species of microorganism that can be applied in biological control, such as bacteria, fungi, and actinomycetes [ 20 , 152 ]. The main mechanisms of biocontrol microorganisms are antagonism, competition, and hyperparasitoidism.…”

Section: Biological and Chemical Controlmentioning

confidence: 99%

“…Therefore, FHB burst have seriously threatened the development of wheat production and have become the focus of scientists’ attention worldwide. Scientists have made extensive efforts in many aspects, such as selection and identification of FHB-resistant germplasm resources [ 4 , 5 ]; genetic breeding [ 6 , 7 , 8 , 9 , 10 ]; biological characteristics and pathogenesis of Fusarium species [ 11 , 12 , 13 , 14 , 15 ]; epidemic occurrence pattern and mechanism [ 16 , 17 ]; disease identification [ 18 ]; and integrated prevention and control technology [ 19 , 20 , 21 ]. Especially in the era of molecular biology, scientists have made significant progress in the localization, cloning, and function of FHB-resistance genes and molecular breeding to resist FHB [ 22 , 23 , 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

Arms Race between the Host and Pathogen Associated with Fusarium Head Blight of Wheat

Chen

Zhou

et al. 2022

Cells

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Fusarium head blight (FHB), or scab, caused by Fusarium species, is an extremely destructive fungal disease in wheat worldwide. In recent decades, researchers have made unremitting efforts in genetic breeding and control technology related to FHB and have made great progress, especially in the exploration of germplasm resources resistant to FHB; identification and pathogenesis of pathogenic strains; discovery and identification of disease-resistant genes; biochemical control, and so on. However, FHB burst have not been effectively controlled and thereby pose increasingly severe threats to wheat productivity. This review focuses on recent advances in pathogenesis, resistance quantitative trait loci (QTLs)/genes, resistance mechanism, and signaling pathways. We identify two primary pathogenetic patterns of Fusarium species and three significant signaling pathways mediated by UGT, WRKY, and SnRK1, respectively; many publicly approved superstar QTLs and genes are fully summarized to illustrate the pathogenetic patterns of Fusarium species, signaling behavior of the major genes, and their sophisticated and dexterous crosstalk. Besides the research status of FHB resistance, breeding bottlenecks in resistant germplasm resources are also analyzed deeply. Finally, this review proposes that the maintenance of intracellular ROS (reactive oxygen species) homeostasis, regulated by several TaCERK-mediated theoretical patterns, may play an important role in plant response to FHB and puts forward some suggestions on resistant QTL/gene mining and molecular breeding in order to provide a valuable reference to contain FHB outbreaks in agricultural production and promote the sustainable development of green agriculture.

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“…have favored active research for environmentally friendly biocontrol solutions. Among them, screening of biological control agents (BCAs) was done independently against these two pathogens in previous works ( 16 – 19 ). However, research and screening for efficient BCAs in controlling conjointly F. graminearum and Z. tritici were limited but could provide very efficient and valuable biopesticide.…”

Section: Introductionmentioning

confidence: 99%

Dimethylpolysulfides production as the major mechanism behind wheat fungal pathogen biocontrol, by Arthrobacter and Microbacterium actinomycetes

Ballot,

Dore,

Rey

et al. 2023

Microbiol Spectr

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Volatile organic compounds (VOCs) produced by plant-associated microorganisms could serve as natural biocontrol compounds. In this work, we investigate the potential of wheat rhizosphere Microbacterium and Arthrobacter actinomycetes to inhibit the growth of major wheat phytopathogenic fungi, Fusarium graminearum and Zymoseptoria tritici via production of antifungal VOCs. A correlative analysis between fungal-growth inhibition versus bacterial volatilomic profiles identified four dimethylpolysulfide (DMPS) VOCs as the main active compounds behind their biocontrol potential. Subsequent inhibition assays reveal that DMTriS (dimethyltrisulfide) exhibits the strongest inhibition effects, then dimethyldisulfide (DMDiS). Further investigation focuses on the mechanisms behind F. graminearum -growth inhibition by the most active strain Microbacterium JM188 in dual culture. Surprisingly, nine interaction-induced VOCs, including two fungal sesquiterpenes, were exclusively detected in dual cultures, suggesting a complex interplay between microbial VOC production and sensing. More importantly, all JM188 VOCs, including antifungal DMPS, were less abundant in dual cultures, suggesting an uptake of bacterial VOCs by the fungus. Quantification of pure DMPS after confrontation with F. graminearum confirmed complete and partial uptake by the fungus of DMTriS and DMDiS VOCs, respectively, suggesting a potential link between the fungal uptake level of bacterial VOCs and their toxicity. Finally, we demonstrated that F. graminearum growth inhibition leads to a complete depletion of DON (deoxynivalenol) carcinogenic mycotoxins, highlighting a significant modulation of fungal metabolism. Collectively, these results pinpoint DMPS as broad-range fungal-inhibiting VOCs produced by rhizosphere Microbacterium and Arthrobacter , and emphasize the extensive VOC-mediated interplay between bacterial biocontrol agents and fungal pathogens. IMPORTANCE As the management of wheat fungal diseases becomes increasingly challenging, the use of bacterial agents with biocontrol potential against the two major wheat phytopathogens, Fusarium graminearum and Zymoseptoria tritici , may prove to be an interesting alternative to conventional pest management. Here, we have shown that dimethylpolysulfide volatiles are ubiquitously and predominantly produced by wheat-associated Microbacterium and Arthrobacter actinomycetes, displaying antifungal activity against both pathogens. By limiting pathogen growth and DON virulence factor production, the use of such DMPS-producing strains as soil biocontrol inoculants could limit the supply of pathogen inocula in soil and plant residues, providing an attractive alternative to dimethyldisulfide fumigant, which has many non-targeted toxicities. Notably, this study demonstrates the importance of bacterial volatile organic compound uptake by inhibited F. graminearum , providing new insights for the study of volatiles-mediated toxicity mechanisms within bacteria-fungus signaling crosstalk.

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Biocontrol Agents Reduce Progression and Mycotoxin Production of Fusarium graminearum in Spikelets and Straws of Wheat

Cited by 6 publications

References 41 publications

Control of malting barley Fusarium head blight by bioagents

Control of malting barley Fusarium head blight by bioagents

Arms Race between the Host and Pathogen Associated with Fusarium Head Blight of Wheat

Dimethylpolysulfides production as the major mechanism behind wheat fungal pathogen biocontrol, by Arthrobacter and Microbacterium actinomycetes

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