Streptomyces toxytricini, a biocontrol plant growth-promoting bacterium against smut of broomcorn millet (Panicum miliaceum L.)

Biological Control, Journal Year: 2025, Volume and Issue: unknown, P. 105743 - 105743

Published: March 1, 2025

Language: Английский

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Evaluation of the Efficacy of Three Antagonistic Bacteria Strains in the Management of Fire Blight

International Journal of Molecular Sciences, Journal Year: 2025, Volume and Issue: 26(9), P. 4438 - 4438

Published: May 7, 2025

Fire blight, caused by Erwinia amylovora, poses a significant threat to the sustainable development of Korla Xiangli (Pyrus×sinkiangensis. Yu) industry. In this study, we used multiple experimental approaches comprehensively evaluate efficacy three antagonistic bacterial strains—namely, Mg-7 (Leuconostoc mesenteroides), Rt-10 (Alcaligenes faecalis), and Rt-11 (Bacillus siamensis)—in controlling fire blight. vitro plate inhibition assays revealed that exhibited largest zone diameter, exceeding in respect, suggesting its strong antifungal potential. therapeutic tests conducted on detached leaves, achieved highest control efficiency, 60.39%, while demonstrated greatest efficiency (76.96%) protective tests. Conversely, trials focusing branches, showed 45.90%, whereas 86.27%, trials. Furthermore, evaluations indicated treatment significantly reduced lesion spread area. Enzymatic analyses that, leaf protection assay, catalase activity (CAT) increases 65.56%, 85.46%, 45.55% under Mg-7, RT-10, RT-11 treatments, respectively, when compared with EA group day four. Correspondingly, branch polyphenol oxidase (PPO) displayed marked elevations 62.84%, 52.06%, 82.69% identical conditions at same time point. These treatments not only upregulated antioxidant enzyme activities but also malondialdehyde (MDA) content, effectively mitigating oxidative damage enhancing foliar resistance blight infection. Field outdoor orchards confirmed suspension provided more effective stable against than Rt-11. Overall, shows potential for use as biocontrol agent managing because high efficacy, stability, ability enhance plant defense responses.

Language: Английский

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A Herpetosiphon llansteffanensis Strain from Forest Soil Exhibits Biocontrol Activity Against Pear Fire Blight

Plants, Journal Year: 2025, Volume and Issue: 14(11), P. 1564 - 1564

Published: May 22, 2025

Fire blight, a devastating bacterial disease caused by Erwinia amylovora, has posed significant challenges to apple and pear production for over century. This study introduces gliding filamentous bacterium, the strain NSD29, isolated from natural forest soil in Xinjiang, China, as biological control agent managing this disease. Comprehensive characterization based on morphological, physiological, biochemical, 16S rRNA gene, whole-genome analyses identified NSD29 Herpetosiphon llansteffanensis. The train demonstrated potent predatory activity against E. amylovora vitro. Its biocontrol efficacy was subsequently evaluated detached leaves, inflorescences, young fruit, shoots of fragrant under controlled greenhouse conditions. Results indicated that applying H. llansteffanensis significantly inhibited lesion expansion leaves achieving protective efficacies 75.2% 72.0%, respectively. Furthermore, pre-treatment spraying with effectively reduced incidence blossom 61.2%. On shoots, application fermentation broth suppressed expansion, demonstrating substantial (86.8%) curative (75.6%) efficacies. research provides first evidence potential species plant diseases, highlighting promising candidate developing strategies combat fire blight.

Language: Английский

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A novel gliding filamentous bacterium Herpetosiphon tianshanensis sp. nov. NSE202 is a promising biocontrol agent for fire blight

Pest Management Science, Journal Year: 2025, Volume and Issue: unknown

Published: May 28, 2025

Abstract BACKGROUND Fire blight ( Erwinia amylovora ), a devastating bacterial disease, has posed significant challenges to apple and pear production for more than century. In recent years, the spread of fire China via Xinjiang heightened concerns among planters government authorities, particularly given region's distinct geography climate, underscoring urgent need innovative biocontrol strategies. RESULTS This study introduced predatory bacterium, Herpetosiphon tianshanensis sp. nov. NSE202, isolated from natural forest soil in Xinjiang, China, that could be new type promising biological control agent management blight. Strain NSE202 differs five other reported species terms its physiological characteristics genomic composition. Using morphological, 16S ribosomal RNA gene whole‐genome analysis, strain was assigned H. demonstrated strong capability against (Ea) vitro . The capacity assayed on inflorescences fragrant biennial potted seedlings under greenhouse conditions. protective efficacy 64.8% assay. Bacterial spraying significantly reduced incidence disease index with therapeutic efficacies 71.9% 61.5%, respectively. stable colonization blossoms twigs pathogen population suppressed planta treated as shown by colony counts plates, scanning electron microscopy, quantitative polymerase chain reaction analysis. Further investigation secondary metabolites collected macroporous resin, extracellular proteins, precipitated using ammonium sulfate, had pronounced lytic activity pathogen. addition, certain lipases, glycoside hydrolases, peptidases secreted may contribute predation process. These findings suggest such components serve factors. CONCLUSIONS discovery provides strategy combating isolates’ multiple capacities colonize exert antagonistic effects makes them highly candidates an integrated solution. © 2025 Society Chemical Industry.

Language: Английский

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Mechanisms and Impact of Rhizosphere Microbial Metabolites on Crop Health, Traits, Functional Components: A Comprehensive Review

Molecules, Journal Year: 2024, Volume and Issue: 29(24), P. 5922 - 5922

Published: Dec. 15, 2024

Current agricultural practices face numerous challenges, including declining soil fertility and heavy reliance on chemical inputs. Rhizosphere microbial metabolites have emerged as promising agents for enhancing crop health yield in a sustainable manner. These metabolites, phytohormones, antibiotics, volatile organic compounds, play critical roles promoting plant growth, boosting resistance to pathogens, improving resilience environmental stresses. This review comprehensively outlines the mechanisms through which rhizosphere influence health, traits, functional components, yield. It also discusses potential applications of secondary biofertilizers highlights challenges associated with their production practical use. Measures overcome these are proposed, alongside an exploration future development fertilizer industry. The findings presented here provide scientific basis utilizing enhance sustainability, offering new strategies management. Integrating could lead increased productivity, improved quality, reduced dependence synthetic inputs, thereby supporting more environmentally friendly resilient system.

Language: Английский

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Growth promotion on maize and whole-genome sequence analysis of Bacillus velezensis D103

Microbiology Spectrum, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 7, 2024

Root-associated microorganisms, particularly plant growth-promoting rhizobacteria (PGPR) from the

Language: Английский

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Hibiscus acid and hydroxycitric acid dimethyl esters from Hibiscus flowers induce production of dithiolopyrrolone antibiotics by Streptomyces Strain MBN2-2

Natural Products and Bioprospecting, Journal Year: 2024, Volume and Issue: 14(1)

Published: July 3, 2024

Plants and microbes are closely associated with each other in their ecological niches. Much has been studied about plant-microbe interactions, but little is known the effect of phytochemicals on at molecular level. To access products cryptic biosynthetic gene clusters bacteria, we incorporated an organic extract hibiscus flowers into culture media different Actinobacteria isolated from plant rhizospheres. This approach led to production broad-spectrum dithiolopyrrolone (DTP) antibiotics, thiolutin (1) aureothricin (2), by Streptomyces sp. MBN2-2. The compounds responsible for triggering these two DTPs were found be acid dimethyl ester (3) hydroxycitric 1,3-dimethyl (4). It was subsequently that addition either Fe2+ or Fe3+ induced 1 2. Chrome Azurol S (CAS) assay revealed 3 4 can chelate iron, therefore, mechanism leading appears related changes iron concentration levels. work supports idea used activate microbial further understand interactions.

Language: Английский

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Isolation, Antibacterial Activity and Molecular Identification of Avocado Rhizosphere Actinobacteria as Potential Biocontrol Agents of Xanthomonas sp.

Microorganisms, Journal Year: 2024, Volume and Issue: 12(11), P. 2199 - 2199

Published: Oct. 31, 2024

Actinobacteria, especially the genus

Language: Английский

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Two new strains of Streptomyces with metabolic potential for biological control of pear black spot disease

BMC Microbiology, Journal Year: 2024, Volume and Issue: 24(1)

Published: Dec. 31, 2024

Pear black spot is caused by Alternaria tenuissima. It one of the diseases concern limiting pear production worldwide. Existing cultivation methods and fungicides are not sufficient to control early blight. Therefore, aim this study was isolate characterize two strains Streptomyces evaluate their potential for biological crop tenuissima while promoting plant growth. enriches resources biocontrol strains.

Language: Английский

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