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  1. Article ; Online: Ensiling process and pomegranate peel extract as a natural additive in potential prevention of fungal and mycotoxin contamination in silage

    Sadhasivam, Sudharsan / Marshi, Rula / Barda, Omer / Zakin, Varda / Britzi, Malka / Gamliel, A. / Sionov, Edward

    Toxicology Reports. 2022, v. 9 p.1557-1565

    2022  

    Abstract: A study was conducted on six animal feed centers in Israel where fungal and mycotoxin presence was examined in maize and wheat silages. Fumonisin mycotoxins FB₁ and FB₂ were present in every maize silage sample analyzed. Interestingly, no correlation was ...

    Abstract A study was conducted on six animal feed centers in Israel where fungal and mycotoxin presence was examined in maize and wheat silages. Fumonisin mycotoxins FB₁ and FB₂ were present in every maize silage sample analyzed. Interestingly, no correlation was found between the occurrence of specific mycotoxins and the presence of the fungal species that might produce them in maize and wheat silages. We further investigated the effect of pomegranate peel extract (PPE) on Fusarium infection and fumonisin biosynthesis in laboratory-prepared maize silage. PPE had an inhibitory effect on FB₁ and FB₂ biosynthesis by Fusarium proliferatum, which resulted in up to 90 % reduction of fumonisin production in silage samples compared to untreated controls. This finding was supported by qRT-PCR analysis, showing downregulation of key genes involved in the fumonisin-biosynthesis pathway under PPE treatment. Our results present promising new options for the use of natural compounds that may help reduce fungal and mycotoxin contamination in agricultural foodstuff, and potentially replace traditionally used synthetic chemicals.
    Keywords Fusarium proliferatum ; biosynthesis ; corn ; corn silage ; foods ; fumonisins ; fungi ; pomegranates ; toxicology ; wheat ; Israel ; Silage ; Mycotoxin analysis ; Pomegranate peel extract
    Language English
    Size p. 1557-1565.
    Publishing place Elsevier B.V.
    Document type Article ; Online
    Note Use and reproduction
    ZDB-ID 2805786-7
    ISSN 2214-7500
    ISSN 2214-7500
    DOI 10.1016/j.toxrep.2022.07.011
    Database NAL-Catalogue (AGRICOLA)

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  2. Article ; Online: Rapid Detection and Quantification of Patulin and Citrinin Contamination in Fruits.

    Sadhasivam, Sudharsan / Barda, Omer / Zakin, Varda / Reifen, Ram / Sionov, Edward

    Molecules (Basel, Switzerland)

    2021  Volume 26, Issue 15

    Abstract: Patulin (PAT) and citrinin (CTN) are the most common mycotoxins produced ... ...

    Abstract Patulin (PAT) and citrinin (CTN) are the most common mycotoxins produced by
    MeSH term(s) Aspergillus/metabolism ; Chromatography, High Pressure Liquid/economics ; Chromatography, High Pressure Liquid/methods ; Citrinin/analysis ; Cost-Benefit Analysis ; Data Accuracy ; Food Contamination/analysis ; Food Quality ; Fruit/chemistry ; Limit of Detection ; Malus/chemistry ; Patulin/analysis ; Penicillium/metabolism ; Pyrus/chemistry ; Time Factors
    Chemical Substances Citrinin (3S697X6SNZ) ; Patulin (95X2BV4W8R)
    Language English
    Publishing date 2021-07-27
    Publishing country Switzerland
    Document type Journal Article ; Validation Study
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules26154545
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.MO 81: Show issues

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  3. Article ; Online: Ensiling process and pomegranate peel extract as a natural additive in potential prevention of fungal and mycotoxin contamination in silage.

    Sadhasivam, Sudharsan / Marshi, Rula / Barda, Omer / Zakin, Varda / Britzi, Malka / Gamliel, Abraham / Sionov, Edward

    Toxicology reports

    2022  Volume 9, Page(s) 1557–1565

    Abstract: A study was conducted on six animal feed centers in Israel where fungal and mycotoxin presence was examined in maize and wheat silages. Fumonisin mycotoxins ... ...

    Abstract A study was conducted on six animal feed centers in Israel where fungal and mycotoxin presence was examined in maize and wheat silages. Fumonisin mycotoxins FB
    Language English
    Publishing date 2022-07-25
    Publishing country Ireland
    Document type Journal Article
    ZDB-ID 2805786-7
    ISSN 2214-7500 ; 2214-7500
    ISSN (online) 2214-7500
    ISSN 2214-7500
    DOI 10.1016/j.toxrep.2022.07.011
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Aneuploidy Formation in the Filamentous Fungus Aspergillus flavus in Response to Azole Stress.

    Barda, Omer / Sadhasivam, Sudharsan / Gong, Di / Doron-Faigenboim, Adi / Zakin, Varda / Drott, Milton T / Sionov, Edward

    Microbiology spectrum

    2023  Volume 11, Issue 4, Page(s) e0433922

    Abstract: Aspergillus flavus is a mycotoxigenic fungus that contaminates many important agricultural crops with aflatoxin B1, the most toxic and carcinogenic natural compound. This fungus is also the second leading cause of human invasive aspergillosis, after ... ...

    Abstract Aspergillus flavus is a mycotoxigenic fungus that contaminates many important agricultural crops with aflatoxin B1, the most toxic and carcinogenic natural compound. This fungus is also the second leading cause of human invasive aspergillosis, after Aspergillus fumigatus, a disease that is particularly prevalent in immunocompromised individuals. Azole drugs are considered the most effective compounds in controlling Aspergillus infections both in clinical and agricultural settings. Emergence of azole resistance in Aspergillus spp. is typically associated with point mutations in
    MeSH term(s) Aspergillus flavus/drug effects ; Aspergillus flavus/genetics ; Voriconazole/pharmacology ; Aneuploidy ; Drug Resistance, Fungal ; Gene Dosage ; Chromosomes, Fungal ; Antifungal Agents/pharmacology
    Chemical Substances Voriconazole (JFU09I87TR) ; Antifungal Agents
    Language English
    Publishing date 2023-06-26
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2807133-5
    ISSN 2165-0497 ; 2165-0497
    ISSN (online) 2165-0497
    ISSN 2165-0497
    DOI 10.1128/spectrum.04339-22
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Low-Resolution Raman Spectroscopy for the detection of contaminant species in algal bioreactors

    Adejimi, Olubunmi E. / Ignat, Timea / Sadhasivam, Giji / Zakin, Varda / Schmilovitch, Ze'ev / Shapiro, Orr H.

    Science of the total environment. 2022 Feb. 25, v. 809

    2022  

    Abstract: Fouling of aquatic systems by harmful microalgal and cyanobacterial species is an environmental and public health concern. Microalgal bioreactors are engineered ecosystems for the cultivation of algal biomass to meet the increasing demand for alternative ...

    Abstract Fouling of aquatic systems by harmful microalgal and cyanobacterial species is an environmental and public health concern. Microalgal bioreactors are engineered ecosystems for the cultivation of algal biomass to meet the increasing demand for alternative protein sources and algae-derived products. Such bioreactors are often open or semi-open ponds or raceways that are prone to contamination by contaminant photosynthetic microorganisms, including harmful cyanobacterial species (HCBs). HCBs affect the quality of products through the accumulation of off-flavours, reducing their acceptance by consumers, and through the production of several different toxins collectively known as cyanotoxins. The density of cultured species within the bioreactor environment creates difficulty in detecting low concentrations of contaminant cells, and there is currently no technology enabling rapid monitoring of contaminations. The present study demonstrates the potential of Low-Resolution Raman Spectroscopy (LRRS) as a tool for rapid detection of low concentrations of HCBs within dense populations of the spirulina (Arthrospira platensis) cultures. An LRRS system adapted for the direct measurement of raw biomass samples was used to assemble a database of Raman spectral signatures, from eight algal and cyanobacterial strains. This dataset was used to develop both quantitative and discriminative chemometric models. The results obtained from the chemometric analyses demonstrate the ability of the LRRS to detect and quantify algal and cyanobacterial species at concentrations as low as 10³ cells/mL and to robustly discriminate between species at concentrations of 10⁴ cells/mL. The LRRS and chemometric analyses were further able to detect the presence of low concentrations (10³cells/mL) of contaminating species, including the toxic cyanobacterium Microcystis aeruginosa, within dense (>10⁷ cells/mL) spirulina cultures. The results presented provide a first demonstration of the potential of LRRS technology for real-time detection of contaminant species within microalgal bioreactors, and possibly for early detection of developing harmful algal blooms in other aquatic ecosystems.
    Keywords Arthrospira platensis ; Microcystis aeruginosa ; Raman spectroscopy ; biomass ; bioreactors ; chemometrics ; cyanobacterial toxins ; data collection ; databases ; environment ; microalgae ; off flavors ; photosynthesis ; poisonous algae ; public health ; rapid methods ; toxicity
    Language English
    Dates of publication 2022-0225
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2021.151138
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

    Z 74/341: Show issues

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  6. Article ; Online: Low-Resolution Raman Spectroscopy for the detection of contaminant species in algal bioreactors.

    Adejimi, Olubunmi E / Ignat, Timea / Sadhasivam, Giji / Zakin, Varda / Schmilovitch, Ze'ev / Shapiro, Orr H

    The Science of the total environment

    2021  Volume 809, Page(s) 151138

    Abstract: Fouling of aquatic systems by harmful microalgal and cyanobacterial species is an environmental and public health concern. Microalgal bioreactors are engineered ecosystems for the cultivation of algal biomass to meet the increasing demand for alternative ...

    Abstract Fouling of aquatic systems by harmful microalgal and cyanobacterial species is an environmental and public health concern. Microalgal bioreactors are engineered ecosystems for the cultivation of algal biomass to meet the increasing demand for alternative protein sources and algae-derived products. Such bioreactors are often open or semi-open ponds or raceways that are prone to contamination by contaminant photosynthetic microorganisms, including harmful cyanobacterial species (HCBs). HCBs affect the quality of products through the accumulation of off-flavours, reducing their acceptance by consumers, and through the production of several different toxins collectively known as cyanotoxins. The density of cultured species within the bioreactor environment creates difficulty in detecting low concentrations of contaminant cells, and there is currently no technology enabling rapid monitoring of contaminations. The present study demonstrates the potential of Low-Resolution Raman Spectroscopy (LRRS) as a tool for rapid detection of low concentrations of HCBs within dense populations of the spirulina (Arthrospira platensis) cultures. An LRRS system adapted for the direct measurement of raw biomass samples was used to assemble a database of Raman spectral signatures, from eight algal and cyanobacterial strains. This dataset was used to develop both quantitative and discriminative chemometric models. The results obtained from the chemometric analyses demonstrate the ability of the LRRS to detect and quantify algal and cyanobacterial species at concentrations as low as 10
    MeSH term(s) Bioreactors ; Chemometrics ; Cyanobacteria Toxins ; Ecosystem ; Harmful Algal Bloom ; Microcystis ; Spectrum Analysis, Raman
    Chemical Substances Cyanobacteria Toxins
    Language English
    Publishing date 2021-10-22
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2021.151138
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    In stock of ZB MED Cologne/Königswinter

    Zs.A 949: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

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  7. Article: The pH-Responsive Transcription Factor PacC Governs Pathogenicity and Ochratoxin A Biosynthesis in

    Barda, Omer / Maor, Uriel / Sadhasivam, Sudharsan / Bi, Yang / Zakin, Varda / Prusky, Dov / Sionov, Edward

    Frontiers in microbiology

    2020  Volume 11, Page(s) 210

    Abstract: Pathogenic fungi must respond effectively to changes in environmental pH for successful host colonization, virulence and toxin production. ...

    Abstract Pathogenic fungi must respond effectively to changes in environmental pH for successful host colonization, virulence and toxin production.
    Language English
    Publishing date 2020-02-13
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2587354-4
    ISSN 1664-302X
    ISSN 1664-302X
    DOI 10.3389/fmicb.2020.00210
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  8. Article ; Online: Analysis of Stored Wheat Grain-Associated Microbiota Reveals Biocontrol Activity among Microorganisms against Mycotoxigenic Fungi.

    Solanki, Manoj Kumar / Abdelfattah, Ahmed / Sadhasivam, Sudharsan / Zakin, Varda / Wisniewski, Michael / Droby, Samir / Sionov, Edward

    Journal of fungi (Basel, Switzerland)

    2021  Volume 7, Issue 9

    Abstract: Wheat grains are colonized by complex microbial communities that have the potential to affect seed quality and susceptibility to disease. Some of the beneficial microbes in these communities have been shown to protect plants against pathogens through ... ...

    Abstract Wheat grains are colonized by complex microbial communities that have the potential to affect seed quality and susceptibility to disease. Some of the beneficial microbes in these communities have been shown to protect plants against pathogens through antagonism. We evaluated the role of the microbiome in seed health: in particular, against mycotoxin-producing fungi. Amplicon sequencing was used to characterize the seed microbiome and determine if epiphytes and endophytes differ in their fungal and bacterial diversity and community composition. We then isolated culturable fungal and bacterial species and evaluated their antagonistic activity against mycotoxigenic fungi. The most prevalent taxa were found to be shared between the epiphytic and endophytic microbiota of stored wheat seeds. Among the isolated bacteria,
    Language English
    Publishing date 2021-09-20
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2784229-0
    ISSN 2309-608X ; 2309-608X
    ISSN (online) 2309-608X
    ISSN 2309-608X
    DOI 10.3390/jof7090781
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  9. Article: Synergistic Inhibition of Mycotoxigenic Fungi and Mycotoxin Production by Combination of Pomegranate Peel Extract and Azole Fungicide.

    Sadhasivam, Sudharsan / Shapiro, Orr H / Ziv, Carmit / Barda, Omer / Zakin, Varda / Sionov, Edward

    Frontiers in microbiology

    2019  Volume 10, Page(s) 1919

    Abstract: Fungal plant pathogens cause considerable losses in yield and quality of field crops worldwide. In addition, under specific environmental conditions, many fungi, including such as ... ...

    Abstract Fungal plant pathogens cause considerable losses in yield and quality of field crops worldwide. In addition, under specific environmental conditions, many fungi, including such as some
    Language English
    Publishing date 2019-08-20
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2587354-4
    ISSN 1664-302X
    ISSN 1664-302X
    DOI 10.3389/fmicb.2019.01919
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: N-Halamine Derivatized Nanoparticles with Selective Cyanocidal Activity: Potential for Targeted Elimination of Harmful Cyanobacterial Blooms.

    Sadhasivam, Giji / Gelber, Chen / Zakin, Varda / Margel, Shlomo / Shapiro, Orr H

    Environmental science & technology

    2019  Volume 53, Issue 15, Page(s) 9160–9170

    Abstract: Harmful cyanobacterial blooms (HCBs) are becoming a major challenge for the management of both natural and man-made freshwater lakes and reservoirs. Phytoplankton communities are an essential component of aquatic ecosystems, providing the basis for ... ...

    Abstract Harmful cyanobacterial blooms (HCBs) are becoming a major challenge for the management of both natural and man-made freshwater lakes and reservoirs. Phytoplankton communities are an essential component of aquatic ecosystems, providing the basis for natural food webs as well as important environmental services. HCBs, driven by a combination of environmental pollution and rising global temperatures, destabilize phytoplankton communities with major impacts on aquatic ecology and trophic interactions. Application of currently available algaecides generally results in unselective elimination of phytoplankton species, disrupting water ecology and environmental services provided by beneficial algae. There is thus a need for selective cyanocidal compounds that can eliminate cyanobacteria while preserving algal members of the phytoplankton community. Here, we demonstrate the efficacy of N-halamine derivatized nanoparticles (Cl NPs) in selectively eliminating cyanobacteria, including the universal bloom-forming species
    MeSH term(s) Cyanobacteria ; Ecosystem ; Eutrophication ; Harmful Algal Bloom ; Lakes ; Nanoparticles ; Phytoplankton
    Language English
    Publishing date 2019-07-22
    Publishing country United States
    Document type Journal Article
    ISSN 1520-5851
    ISSN (online) 1520-5851
    DOI 10.1021/acs.est.9b01368
    Database MEDical Literature Analysis and Retrieval System OnLINE

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