Characterization of Argentinian Endemic Aspergillus flavus Isolates and Their Potential Use as Biocontrol Agents for Mycotoxins in Maize
- Autores
- Camiletti, Boris Xavier; Moral, Juan; Asensio, Claudia Mariana; Torrico Ramallo, Ada Karina; Lucini, Enrique Iván; Gimenez, Maria De La Paz; Michailides, Themis J.
- Año de publicación
- 2018
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Maize (Zea mays L.) is a highly valuable crop in Argentina, frequently contaminated with the mycotoxins produced by Aspergillus flavus. Biocontrol products formulated with atoxigenic (nontoxic) strains of this fungal species are well known as an effective method to reduce this contamination. In the present study, 83 A. flavus isolates from two maize regions of Argentina were characterized and evaluated for their ability to produce or lack of producing mycotoxins in order to select atoxigenic strains to be used as potential biocontrol agents (BCA). All of the isolates were tested for aflatoxin and cyclopiazonic acid (CPA) production in maize kernels and a liquid culture medium. Genetic diversity of the nonaflatoxigenic isolates was evaluated by analysis of vegetative compatibility groups (VCG) and confirmation of deletions in the aflatoxin biosynthesis cluster. Eight atoxigenic isolates were compared for their ability to reduce aflatoxin and CPA contamination in maize kernels in coinoculation tests. The A. flavus population was composed of 32% aflatoxin and CPA producers and 52% CPA producers, and 16% was determined as atoxigenic. All of the aflatoxin producer isolates also produced CPA. Aflatoxin and CPA production was significantly higher in maize kernels than in liquid medium. The 57 nonaflatoxigenic strains formed six VCG, with AM1 and AM5 being the dominant groups, with a frequency of 58 and 35%, respectively. In coinoculation experiments, all of the atoxigenic strains reduced aflatoxin from 54 to 83% and CPA from 60 to 97%. Members of group AM1 showed a greater aflatoxin reduction than members of AM5 (72 versus 66%) but no differences were detected in CPA production. Here, we described for the first time atoxigenic isolates of A. flavus that show promise to be used as BCA in maize crops in Argentina. This innovating biological control approach should be considered, developed further, and used by the maize industry to preserve the quality properties and food safety of maize kernels in Argentina.
Instituto de Patología Vegetal
Fil: Camiletti, B.X. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.
Fil: Camiletti, B.X. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias; Argentina
Fil: Moral, Juan. University of Córdoba. Campus de Rabanales. Departamento de Agronomía; España
Fil: Moral, Juan. University of California. Kearney Agricultural Research and Extension Center; Estados Unidos
Fil: Asensio, Claudia M. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Química Biológica; Argentina
Fil: Asensio, Claudia M. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Torrico Ramallo, Ada Karina. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patología Vegetal; Argentina
Fil: Lucini, Enrique I. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Microbiología Agrícola; Argentina
Fil: Gimenez, Maria De La Paz. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patología Vegetal; Argentina
Fil: Michailides, Themis J. University of California. Kearney Agricultural Research and Extension Center; Estados Unidos - Fuente
- Phytopathology 108 (7) : 818-828 (2018)
- Materia
-
Aspergillus Flavus
Zea Mays
Argentina
Aflatoxinas
Maíz
Micotoxinas
Maize
Mycotoxins - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Instituto Nacional de Tecnología Agropecuaria
- OAI Identificador
- oai:localhost:20.500.12123/12018
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Characterization of Argentinian Endemic Aspergillus flavus Isolates and Their Potential Use as Biocontrol Agents for Mycotoxins in MaizeCamiletti, Boris XavierMoral, JuanAsensio, Claudia MarianaTorrico Ramallo, Ada KarinaLucini, Enrique IvánGimenez, Maria De La PazMichailides, Themis J.Aspergillus FlavusZea MaysArgentinaAflatoxinasMaízMicotoxinasMaizeMycotoxinsMaize (Zea mays L.) is a highly valuable crop in Argentina, frequently contaminated with the mycotoxins produced by Aspergillus flavus. Biocontrol products formulated with atoxigenic (nontoxic) strains of this fungal species are well known as an effective method to reduce this contamination. In the present study, 83 A. flavus isolates from two maize regions of Argentina were characterized and evaluated for their ability to produce or lack of producing mycotoxins in order to select atoxigenic strains to be used as potential biocontrol agents (BCA). All of the isolates were tested for aflatoxin and cyclopiazonic acid (CPA) production in maize kernels and a liquid culture medium. Genetic diversity of the nonaflatoxigenic isolates was evaluated by analysis of vegetative compatibility groups (VCG) and confirmation of deletions in the aflatoxin biosynthesis cluster. Eight atoxigenic isolates were compared for their ability to reduce aflatoxin and CPA contamination in maize kernels in coinoculation tests. The A. flavus population was composed of 32% aflatoxin and CPA producers and 52% CPA producers, and 16% was determined as atoxigenic. All of the aflatoxin producer isolates also produced CPA. Aflatoxin and CPA production was significantly higher in maize kernels than in liquid medium. The 57 nonaflatoxigenic strains formed six VCG, with AM1 and AM5 being the dominant groups, with a frequency of 58 and 35%, respectively. In coinoculation experiments, all of the atoxigenic strains reduced aflatoxin from 54 to 83% and CPA from 60 to 97%. Members of group AM1 showed a greater aflatoxin reduction than members of AM5 (72 versus 66%) but no differences were detected in CPA production. Here, we described for the first time atoxigenic isolates of A. flavus that show promise to be used as BCA in maize crops in Argentina. This innovating biological control approach should be considered, developed further, and used by the maize industry to preserve the quality properties and food safety of maize kernels in Argentina.Instituto de Patología VegetalFil: Camiletti, B.X. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Camiletti, B.X. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias; ArgentinaFil: Moral, Juan. University of Córdoba. Campus de Rabanales. Departamento de Agronomía; EspañaFil: Moral, Juan. University of California. Kearney Agricultural Research and Extension Center; Estados UnidosFil: Asensio, Claudia M. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Química Biológica; ArgentinaFil: Asensio, Claudia M. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Torrico Ramallo, Ada Karina. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patología Vegetal; ArgentinaFil: Lucini, Enrique I. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Microbiología Agrícola; ArgentinaFil: Gimenez, Maria De La Paz. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patología Vegetal; ArgentinaFil: Michailides, Themis J. University of California. Kearney Agricultural Research and Extension Center; Estados UnidosAmerican Phytopathological Society2022-06-06T10:19:51Z2022-06-06T10:19:51Z2018-05-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12123/12018https://apsjournals.apsnet.org/doi/10.1094/PHYTO-07-17-0255-R0031-949Xhttps://doi.org/10.1094/PHYTO-07-17-0255-RPhytopathology 108 (7) : 818-828 (2018)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuariaenginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)2025-09-04T09:49:23Zoai:localhost:20.500.12123/12018instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2025-09-04 09:49:24.769INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse |
dc.title.none.fl_str_mv |
Characterization of Argentinian Endemic Aspergillus flavus Isolates and Their Potential Use as Biocontrol Agents for Mycotoxins in Maize |
title |
Characterization of Argentinian Endemic Aspergillus flavus Isolates and Their Potential Use as Biocontrol Agents for Mycotoxins in Maize |
spellingShingle |
Characterization of Argentinian Endemic Aspergillus flavus Isolates and Their Potential Use as Biocontrol Agents for Mycotoxins in Maize Camiletti, Boris Xavier Aspergillus Flavus Zea Mays Argentina Aflatoxinas Maíz Micotoxinas Maize Mycotoxins |
title_short |
Characterization of Argentinian Endemic Aspergillus flavus Isolates and Their Potential Use as Biocontrol Agents for Mycotoxins in Maize |
title_full |
Characterization of Argentinian Endemic Aspergillus flavus Isolates and Their Potential Use as Biocontrol Agents for Mycotoxins in Maize |
title_fullStr |
Characterization of Argentinian Endemic Aspergillus flavus Isolates and Their Potential Use as Biocontrol Agents for Mycotoxins in Maize |
title_full_unstemmed |
Characterization of Argentinian Endemic Aspergillus flavus Isolates and Their Potential Use as Biocontrol Agents for Mycotoxins in Maize |
title_sort |
Characterization of Argentinian Endemic Aspergillus flavus Isolates and Their Potential Use as Biocontrol Agents for Mycotoxins in Maize |
dc.creator.none.fl_str_mv |
Camiletti, Boris Xavier Moral, Juan Asensio, Claudia Mariana Torrico Ramallo, Ada Karina Lucini, Enrique Iván Gimenez, Maria De La Paz Michailides, Themis J. |
author |
Camiletti, Boris Xavier |
author_facet |
Camiletti, Boris Xavier Moral, Juan Asensio, Claudia Mariana Torrico Ramallo, Ada Karina Lucini, Enrique Iván Gimenez, Maria De La Paz Michailides, Themis J. |
author_role |
author |
author2 |
Moral, Juan Asensio, Claudia Mariana Torrico Ramallo, Ada Karina Lucini, Enrique Iván Gimenez, Maria De La Paz Michailides, Themis J. |
author2_role |
author author author author author author |
dc.subject.none.fl_str_mv |
Aspergillus Flavus Zea Mays Argentina Aflatoxinas Maíz Micotoxinas Maize Mycotoxins |
topic |
Aspergillus Flavus Zea Mays Argentina Aflatoxinas Maíz Micotoxinas Maize Mycotoxins |
dc.description.none.fl_txt_mv |
Maize (Zea mays L.) is a highly valuable crop in Argentina, frequently contaminated with the mycotoxins produced by Aspergillus flavus. Biocontrol products formulated with atoxigenic (nontoxic) strains of this fungal species are well known as an effective method to reduce this contamination. In the present study, 83 A. flavus isolates from two maize regions of Argentina were characterized and evaluated for their ability to produce or lack of producing mycotoxins in order to select atoxigenic strains to be used as potential biocontrol agents (BCA). All of the isolates were tested for aflatoxin and cyclopiazonic acid (CPA) production in maize kernels and a liquid culture medium. Genetic diversity of the nonaflatoxigenic isolates was evaluated by analysis of vegetative compatibility groups (VCG) and confirmation of deletions in the aflatoxin biosynthesis cluster. Eight atoxigenic isolates were compared for their ability to reduce aflatoxin and CPA contamination in maize kernels in coinoculation tests. The A. flavus population was composed of 32% aflatoxin and CPA producers and 52% CPA producers, and 16% was determined as atoxigenic. All of the aflatoxin producer isolates also produced CPA. Aflatoxin and CPA production was significantly higher in maize kernels than in liquid medium. The 57 nonaflatoxigenic strains formed six VCG, with AM1 and AM5 being the dominant groups, with a frequency of 58 and 35%, respectively. In coinoculation experiments, all of the atoxigenic strains reduced aflatoxin from 54 to 83% and CPA from 60 to 97%. Members of group AM1 showed a greater aflatoxin reduction than members of AM5 (72 versus 66%) but no differences were detected in CPA production. Here, we described for the first time atoxigenic isolates of A. flavus that show promise to be used as BCA in maize crops in Argentina. This innovating biological control approach should be considered, developed further, and used by the maize industry to preserve the quality properties and food safety of maize kernels in Argentina. Instituto de Patología Vegetal Fil: Camiletti, B.X. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina. Fil: Camiletti, B.X. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias; Argentina Fil: Moral, Juan. University of Córdoba. Campus de Rabanales. Departamento de Agronomía; España Fil: Moral, Juan. University of California. Kearney Agricultural Research and Extension Center; Estados Unidos Fil: Asensio, Claudia M. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Química Biológica; Argentina Fil: Asensio, Claudia M. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Torrico Ramallo, Ada Karina. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patología Vegetal; Argentina Fil: Lucini, Enrique I. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Microbiología Agrícola; Argentina Fil: Gimenez, Maria De La Paz. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patología Vegetal; Argentina Fil: Michailides, Themis J. University of California. Kearney Agricultural Research and Extension Center; Estados Unidos |
description |
Maize (Zea mays L.) is a highly valuable crop in Argentina, frequently contaminated with the mycotoxins produced by Aspergillus flavus. Biocontrol products formulated with atoxigenic (nontoxic) strains of this fungal species are well known as an effective method to reduce this contamination. In the present study, 83 A. flavus isolates from two maize regions of Argentina were characterized and evaluated for their ability to produce or lack of producing mycotoxins in order to select atoxigenic strains to be used as potential biocontrol agents (BCA). All of the isolates were tested for aflatoxin and cyclopiazonic acid (CPA) production in maize kernels and a liquid culture medium. Genetic diversity of the nonaflatoxigenic isolates was evaluated by analysis of vegetative compatibility groups (VCG) and confirmation of deletions in the aflatoxin biosynthesis cluster. Eight atoxigenic isolates were compared for their ability to reduce aflatoxin and CPA contamination in maize kernels in coinoculation tests. The A. flavus population was composed of 32% aflatoxin and CPA producers and 52% CPA producers, and 16% was determined as atoxigenic. All of the aflatoxin producer isolates also produced CPA. Aflatoxin and CPA production was significantly higher in maize kernels than in liquid medium. The 57 nonaflatoxigenic strains formed six VCG, with AM1 and AM5 being the dominant groups, with a frequency of 58 and 35%, respectively. In coinoculation experiments, all of the atoxigenic strains reduced aflatoxin from 54 to 83% and CPA from 60 to 97%. Members of group AM1 showed a greater aflatoxin reduction than members of AM5 (72 versus 66%) but no differences were detected in CPA production. Here, we described for the first time atoxigenic isolates of A. flavus that show promise to be used as BCA in maize crops in Argentina. This innovating biological control approach should be considered, developed further, and used by the maize industry to preserve the quality properties and food safety of maize kernels in Argentina. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-05-07 2022-06-06T10:19:51Z 2022-06-06T10:19:51Z |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/20.500.12123/12018 https://apsjournals.apsnet.org/doi/10.1094/PHYTO-07-17-0255-R 0031-949X https://doi.org/10.1094/PHYTO-07-17-0255-R |
url |
http://hdl.handle.net/20.500.12123/12018 https://apsjournals.apsnet.org/doi/10.1094/PHYTO-07-17-0255-R https://doi.org/10.1094/PHYTO-07-17-0255-R |
identifier_str_mv |
0031-949X |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
American Phytopathological Society |
publisher.none.fl_str_mv |
American Phytopathological Society |
dc.source.none.fl_str_mv |
Phytopathology 108 (7) : 818-828 (2018) reponame:INTA Digital (INTA) instname:Instituto Nacional de Tecnología Agropecuaria |
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INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuaria |
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tripaldi.nicolas@inta.gob.ar |
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