Growth Dynamics, Sporulation and Stability of Aflatoxin Production in Aspergillus flavus Strains From Preharvest Maize in Argentina
Non-aflatoxigenic Aspergillus flavus strains have emerged as promising biocontrol agents to reduce aflatoxin contamination in maize crops. This study aimed to evaluate the growth dynamics, sporulation capacity and phenotypic stability of local non-aflatoxigenic A. flavus strains from Argentina compa...
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| Format: | info:ar-repo/semantics/artículo |
| Language: | Inglés |
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Wiley
2025
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| Online Access: | http://hdl.handle.net/20.500.12123/23627 https://bsppjournals.onlinelibrary.wiley.com/doi/10.1111/ppa.70030 https://doi.org/10.1111/ppa.70030 |
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| author | Ruiz Posse, Agustina María Camiletti, Boris Xavier Gimenez, Maria De La Paz Torrico Ramallo, Ada Karina |
| author_browse | Camiletti, Boris Xavier Gimenez, Maria De La Paz Ruiz Posse, Agustina María Torrico Ramallo, Ada Karina |
| author_facet | Ruiz Posse, Agustina María Camiletti, Boris Xavier Gimenez, Maria De La Paz Torrico Ramallo, Ada Karina |
| author_sort | Ruiz Posse, Agustina María |
| collection | INTA Digital |
| description | Non-aflatoxigenic Aspergillus flavus strains have emerged as promising biocontrol agents to reduce aflatoxin contamination in maize crops. This study aimed to evaluate the growth dynamics, sporulation capacity and phenotypic stability of local non-aflatoxigenic A. flavus strains from Argentina compared to aflatoxigenic strains. Eighteen non-aflatoxigenic strains, isolated from maize ears grown in Argentina's central agricultural region, were assessed for growth and spore production at various temperatures, with the results indicating superior growth and sporulation under optimal conditions (30°C). The phenotypic stability of these strains was tested by conducting 20 consecutive subcultures, confirming the retention of their non-aflatoxigenic character. The local non-aflatoxigenic strains lack the nucleotide 591 polymorphism in the pksA gene, indicating that their inability to produce aflatoxins is not due to this mutation. These strains demonstrated the ability to survive and grow under high-temperature conditions, making them suitable candidates for biocontrol applications in regions with variable climates and significant thermal amplitudes. The findings support the potential of these local non-aflatoxigenic strains as effective biocontrol agents to mitigate aflatoxin contamination in maize production systems in Argentina. |
| format | info:ar-repo/semantics/artículo |
| id | INTA23627 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | INTA236272025-08-29T16:20:28Z Growth Dynamics, Sporulation and Stability of Aflatoxin Production in Aspergillus flavus Strains From Preharvest Maize in Argentina Ruiz Posse, Agustina María Camiletti, Boris Xavier Gimenez, Maria De La Paz Torrico Ramallo, Ada Karina Biological Control Aflatoxins Maize Control Biológico Argentina Aspergillus flavus Aflatoxinas Maíz Biocontrol Growth Curve Phenotypic Characterisation Sporulation Curve Non-aflatoxigenic Aspergillus flavus strains have emerged as promising biocontrol agents to reduce aflatoxin contamination in maize crops. This study aimed to evaluate the growth dynamics, sporulation capacity and phenotypic stability of local non-aflatoxigenic A. flavus strains from Argentina compared to aflatoxigenic strains. Eighteen non-aflatoxigenic strains, isolated from maize ears grown in Argentina's central agricultural region, were assessed for growth and spore production at various temperatures, with the results indicating superior growth and sporulation under optimal conditions (30°C). The phenotypic stability of these strains was tested by conducting 20 consecutive subcultures, confirming the retention of their non-aflatoxigenic character. The local non-aflatoxigenic strains lack the nucleotide 591 polymorphism in the pksA gene, indicating that their inability to produce aflatoxins is not due to this mutation. These strains demonstrated the ability to survive and grow under high-temperature conditions, making them suitable candidates for biocontrol applications in regions with variable climates and significant thermal amplitudes. The findings support the potential of these local non-aflatoxigenic strains as effective biocontrol agents to mitigate aflatoxin contamination in maize production systems in Argentina. Instituto de Patología Vegetal Fil: Ruiz Posse, Agustina María. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Fitopatología y Modelización Agrícola (UFyMA); Argentina Fil: Ruiz Posse, Agustina María. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patología Vegetal; Argentina Fil: Camiletti, Boris Xavier. University of Illinois Urbana-Champaign. Department of Crop Sciences; USA Fil: Gimenez, Maria De La Paz. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patología Vegetal; Argentina Fil: Torrico Ramallo, Ada Karina. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patología Vegetal; Argentina Fil: Torrico Ramallo, Ada Karina. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Fitopatología y Modelización Agrícola (UFyMA); Argentina 2025-08-29T16:12:06Z 2025-08-29T16:12:06Z 2025-07-31 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/23627 https://bsppjournals.onlinelibrary.wiley.com/doi/10.1111/ppa.70030 0032-0862 1365-3059 https://doi.org/10.1111/ppa.70030 eng info:eu-repograntAgreement/INTA/2023-PE-L04-I073, Desarrollo de bioinsumos y su integración en estrategias de manejo de adversidades bióticas y abióticas en cultivos agrícolas y forestales info:eu-repograntAgreement/INTA/2023-PE-L04-I120, Inocuidad física, química y biológica de los alimentos. Metodologías analíticas, tecnologías, estrategias de intervención innovadoras y análisis de riesgo info:eu-repo/semantics/restrictedAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf Wiley Plant pathology : 1-10. (First published: 31 July 2025) |
| spellingShingle | Biological Control Aflatoxins Maize Control Biológico Argentina Aspergillus flavus Aflatoxinas Maíz Biocontrol Growth Curve Phenotypic Characterisation Sporulation Curve Ruiz Posse, Agustina María Camiletti, Boris Xavier Gimenez, Maria De La Paz Torrico Ramallo, Ada Karina Growth Dynamics, Sporulation and Stability of Aflatoxin Production in Aspergillus flavus Strains From Preharvest Maize in Argentina |
| title | Growth Dynamics, Sporulation and Stability of Aflatoxin Production in Aspergillus flavus Strains From Preharvest Maize in Argentina |
| title_full | Growth Dynamics, Sporulation and Stability of Aflatoxin Production in Aspergillus flavus Strains From Preharvest Maize in Argentina |
| title_fullStr | Growth Dynamics, Sporulation and Stability of Aflatoxin Production in Aspergillus flavus Strains From Preharvest Maize in Argentina |
| title_full_unstemmed | Growth Dynamics, Sporulation and Stability of Aflatoxin Production in Aspergillus flavus Strains From Preharvest Maize in Argentina |
| title_short | Growth Dynamics, Sporulation and Stability of Aflatoxin Production in Aspergillus flavus Strains From Preharvest Maize in Argentina |
| title_sort | growth dynamics sporulation and stability of aflatoxin production in aspergillus flavus strains from preharvest maize in argentina |
| topic | Biological Control Aflatoxins Maize Control Biológico Argentina Aspergillus flavus Aflatoxinas Maíz Biocontrol Growth Curve Phenotypic Characterisation Sporulation Curve |
| url | http://hdl.handle.net/20.500.12123/23627 https://bsppjournals.onlinelibrary.wiley.com/doi/10.1111/ppa.70030 https://doi.org/10.1111/ppa.70030 |
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