Biocontrol of toxinogenic Aspergillus flavus and Fusarium oxysporum f. sp. albedinis by two rare Saharan actinomycetes strains and LC-ESI/MS-MS profiling of their antimicrobial products

Meliani, Hayate; Makhloufi, Ahmed; Chérif, Ameur; Mahjoubi, Mouna; Makhloufi, Khadidja

doi:10.1016/j.sjbs.2022.103288

Cited by 6 publications

(2 citation statements)

References 45 publications

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“…In this context, the utilization of the fermentation products of actinomycetes is the predominant approach. For instance, actinomycetes have demonstrated the ability to produce antimicrobial compounds like the macrolide conjumycin (Xu et al., 2023 ), analogues of aflatoxin inhibitors (Azman et al., 2017 ), erythromycin (He et al., 2020 ) and pyrones (Meliani et al., 2022 ), all of which contribute to their inhibitory effects on pathogenic bacteria. However, it is worth noting that, despite these remarkable attributes, no actinomycetes with documented antagonistic effects against peach brown rot have been reported to date.…”

Section: Introductionmentioning

confidence: 99%

Inhibition of Monilinia fructicola sporulation and pathogenicity through eucalyptol‐mediated targeting of MfCat2 by Streptomyces lincolnensis strain JCP1‐7

Chen,

Yang,

Chen

et al. 2024

Molecular Plant Pathology

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Peach brown rot, attributed to Monilinia fructicola, presents a significant threat to postharvest peach cultivation, causing losses of up to 80%. With an increasing number of countries, spearheaded by the European Union, imposing bans on chemical agents in fruit production, there is a growing interest in mining highly active antibacterial compounds from biological control strains for postharvest disease management. In this study, we highlight the unique ability of Streptomyces lincolnensis strain JCP1‐7 to inhibit M. fructicola sporulation, despite its limited antimicrobial efficacy. Through GC–MS analysis, eucalyptol was identified as the key compound. Fumigation of diseased fruits with eucalyptol at a concentration of 0.0335 μg cm−3 demonstrated an in vivo inhibition rate against M. fructicola of 93.13%, completely suppressing spore formation. Transcriptome analysis revealed the impact of eucalyptol on multiple pathogenesis‐related pathways, particularly through the inhibition of catalase 2 (Cat2) expression. Experiments with a MfCat2 knockout strain (ΔMfCat2) showed reduced pathogenicity and sensitivity to JCP1‐7 and eucalyptol, suggesting MfCat2 as a potential target of JCP1‐7 and eucalyptol against M. fructicola. Our findings elucidate that eucalyptol produced by S. lincolnensis JCP1‐7 inhibits M. fructicola sporulation by regulating MfCat2, thereby effectively reducing postharvest peach brown rot occurrence. The use of fumigation of eucalyptol offers insights into peach brown rot management on a large scale, thus making a significant contribution to agricultural research.

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Section: Introductionmentioning

confidence: 99%

Inhibition of Monilinia fructicola sporulation and pathogenicity through eucalyptol‐mediated targeting of MfCat2 by Streptomyces lincolnensis strain JCP1‐7

Chen,

Yang,

Chen

et al. 2024

Molecular Plant Pathology

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“…These filamentous bacteria are widely distributed and can be isolated from various terrestrial and marine environments. One of the well-known marine environments recognized for its geo-biodiversity is the Mediterranean coastline, which hosts more than 7% of the world's marine biodiversity, encompassing marine sediments, sponges, and algae, all of which are notable for their richness in actinomycete strains [12][13][14]. This coastal expanse holds the Algerian coast which spans 1622 km, and represents a yet untapped ecosystem, teeming a potential diversity of Actinobacteria strains, waiting to be discovered and harnessed [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Silver Carbonate Nanoparticles Biosynthesized Using Marine Actinobacteria and Exploring of Their Antimicrobial and Antibiofilm Activity

Messaoudi,

Benamar,

Azizi

et al. 2023

Marine Drugs

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Bacterial resistance to different antimicrobial agents is growing with alarming speed, especially when bacterial cells are living in biofilm. Hybrid nanoparticles, synthesized through the green method, hold promise as a potential solution to this challenge. In this study, 66 actinomycete strains were isolated from three distinct marine sources: marine sediment, the algae Codium bursa, and the marine sponge Chondrosia reniformis. From the entirety of the isolated strains, one strain, S26, identified as Saccharopolyspora erythrea, was selected based on its taxonomic position and significant antimicrobial activity. Using the biomass of the selected marine Actinobacteria, the green synthesis of eco-friendly silver carbonate nanoparticles (BioAg2CO3NPs) is reported for the first time in this pioneering study. The BioAg2CO3NPs were characterized using different spectroscopic and microscopic analyses; the synthesized BioAg2CO3NPs primarily exhibit a triangular shape, with an approximate size of 100 nm. Biological activity evaluation indicated that the BioAg2CO3NPs exhibited good antimicrobial activity against all tested microorganisms and were able to remove 58% of the biofilm formed by the Klebsiella pneumoniae kp6 strain.

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Actinobacteria: an underestimated source of potential microbial biocontrol agents against fusarium-related diseases in cultivated crops

et al. 2023

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Biocontrol of toxinogenic Aspergillus flavus and Fusarium oxysporum f. sp. albedinis by two rare Saharan actinomycetes strains and LC-ESI/MS-MS profiling of their antimicrobial products

Cited by 6 publications

References 45 publications

Inhibition of Monilinia fructicola sporulation and pathogenicity through eucalyptol‐mediated targeting of MfCat2 by Streptomyces lincolnensis strain JCP1‐7

Inhibition of Monilinia fructicola sporulation and pathogenicity through eucalyptol‐mediated targeting of MfCat2 by Streptomyces lincolnensis strain JCP1‐7

Characterization of Silver Carbonate Nanoparticles Biosynthesized Using Marine Actinobacteria and Exploring of Their Antimicrobial and Antibiofilm Activity

Actinobacteria: an underestimated source of potential microbial biocontrol agents against fusarium-related diseases in cultivated crops

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