Bacillus cereus B8W8 an effective bacterial antagonist against major postharvest fungal pathogens of fruit

Khadiri, Mohammed; Boubaker, Hassan; Askarne, Latifa; Ezrari, Said; Radouane, Nabil; Farhaoui, Abdelaaziz; Hamss, Hajar El; Tahiri, Abdessalem; Barka, Essaid Aït; Lahlali, Rachid

doi:10.1016/j.postharvbio.2023.112315

Cited by 28 publications

(2 citation statements)

References 75 publications

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“…The authors showed the control of rubber tree disease by actinobacteria metabolites. Khadiri et al [47] showed the antagonistic effect of Bacillus cereus against several phytopathogenic fungi of citrus fruits. The authors used the same methodology used in this work to assess the ability of the bacteria to inhibit the germination of fungal spores.…”

Section: Discussionmentioning

confidence: 99%

Biocontrol Potential of Serratia Marcescens (B8) and Bacillus sp. (B13) Isolated from Urban Mangroves in Raposa, Brazil

Pereira,

Amorim,

Aragão

et al. 2023

Life

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This study analyzed the antifungal potential of 16 bacterial strains isolated from mangrove sediment. Bacterial selection was conducted in a solid medium. This was followed by the production and extraction of metabolites using ethyl acetate to evaluate chitinase production, antifungal activity, and toxicity toward Allium cepa and Tenebrio molitor. Bacterial strains B8, B11, and B13 produced the largest inhibition halos (>30 mm) toward Fusarium solani, Fusarium oxysporum, and Rhizoctonia solani fungi. Strains B1, B3, B6, B8, B11, B13, B14, and B16 produced chitinases. In assays using liquid media, B8 and B13 produced the largest inhibition halos. Exposing the fungal inocula to metabolic extracts of strains B6, B8, B11, B13, B14, B15, and B16 caused micromorphological alterations in the inocula, culminating in the inhibition of R. solani sporulation and spore germination. Toxicity tests using Allium cepa and Tenebrio molitor revealed that the metabolites showed low toxicity. Six of the bacterial strains were molecularly identified to species levels, and a further two to genus level. These included Serratia marcescens (B8), which exhibited activity in all tests. Mangroves provide a useful resource for the isolation of microorganisms for biocontrol. Among the isolates, Serratia marcescens and Bacillus spp. showed the greatest potential to produce metabolites for use as biocontrol agents in agriculture.

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Section: Discussionmentioning

confidence: 99%

Biocontrol Potential of Serratia Marcescens (B8) and Bacillus sp. (B13) Isolated from Urban Mangroves in Raposa, Brazil

Pereira,

Amorim,

Aragão

et al. 2023

Life

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“…They were wounded in the equatorial part in three equidistant sites (3 mm in diameter and 4 mm in depth) using a sterile stainless steel rod. Each wound was inoculated with 50 µL of each spore suspension (1 × 10 4 spores/mL Apples inoculated with sterile distilled water were used as controls [67]. The fruit was then placed in sterile plastic boxes and incubated in a culture chamber for 14 days at 25 • C. The diameter of each fruit was measured using a caliper, and a re-isolation on the PDA medium was performed according to Koch's postulate [47].…”

Section: Pathogenicity Testmentioning

confidence: 99%

Unlocking Nature’s Secrets: Molecular Insights into Postharvest Pathogens Impacting Moroccan Apples and Innovations in the Assessment of Storage Conditions

Khadiri,

Boubaker,

Laasli

et al. 2024

Plants

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Apple production holds a prominent position in Morocco’s Rosaceae family. However, annual production can fluctuate due to substantial losses caused by fungal diseases affecting stored apples. Our findings emphasize that the pre-storage treatment of apples, disinfection of storage facilities, box type, and fruit sorting are pivotal factors affecting apple losses during storage. Additionally, the adopted preservation technique was significantly correlated with the percentage of damage caused by fungal infections. Blue mold accounts for nearly three-quarters of the diseases detected, followed by gray rot with a relatively significant incidence. This study has revealed several fungal diseases affecting stored apples caused by pathogens such as Penicillium expansum, Botrytis cinerea, Alternaria alternata, Trichothecium roseum, Fusarium avenaceum, Cadophora malorum, and Neofabraea vagabunda. Notably, these last two fungal species have been reported for the first time in Morocco as pathogens of stored apples. These data affirm that the high losses of apples in Morocco, attributed primarily to P. expansum and B. cinerea, pose a significant threat in terms of reduced production and diminished fruit quality. Hence, adopting controlled atmosphere storage chambers and implementing good practices before apple storage is crucial.

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Natural Products Produced by the Species of Bacillus cereus Group: Recent Updates

Azizoglu,

Argentel‐Martínez,

Peñuelas‐Rubio

et al. 2024

Journal of Basic Microbiology

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Bacillus cereus group produces diverse antimicrobial compounds through different metabolic pathways, including amino acid‐based compounds, sugar derivatives, volatile and miscellaneous compounds. These antimicrobial compounds exhibit antibacterial and antifungal activities against various plant pathogens, promoting plant growth and enhancing tolerance to abiotic stresses. They also exhibit nematicidal activities against plant nematodes and antagonistic effects against pathogens in aquatic animals, promoting growth and inducing immune responses. Moreover, B. cereus group bacteria play a significant role in bioremediation by breaking down or neutralizing environmental pollutants, such as plastics, petroleum products, heavy metals, and insecticides. They produce enzymes like laccases, lipases, proteases, and various oxidases, contributing to the degradation of these pollutants. In the food industry, they can cause food poisoning due to their production of enterotoxins. However, they are also utilized in various industrial applications, such as producing environmentally friendly bio‐based materials, biofertilizers, and nanoparticles. Notably, B. cereus transforms selenite into selenium nanoparticles, which have health benefits, including cancer prevention. In summary, B. cereus group bacteria have diverse applications in agriculture, bioremediation, industry, and medicine, contributing to sustainable and eco‐friendly solutions across multiple fields. In this review, we have revised B. cereus group and the characteristics of every species; we have also highlighted the more important compounds secreted by the species of B. cereus group and the applications of these compounds. The aim is to explain the available secondary metabolites to classify the species from this group, increasing the knowledge about taxonomy of this group.

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Bacillus cereus B8W8 an effective bacterial antagonist against major postharvest fungal pathogens of fruit

Cited by 28 publications

References 75 publications

Biocontrol Potential of Serratia Marcescens (B8) and Bacillus sp. (B13) Isolated from Urban Mangroves in Raposa, Brazil

Biocontrol Potential of Serratia Marcescens (B8) and Bacillus sp. (B13) Isolated from Urban Mangroves in Raposa, Brazil

Unlocking Nature’s Secrets: Molecular Insights into Postharvest Pathogens Impacting Moroccan Apples and Innovations in the Assessment of Storage Conditions

Natural Products Produced by the Species of Bacillus cereus Group: Recent Updates

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