Water activity and temperature effects on growth of Alternaria arborescens on tomato medium

Autores
Vaquera, Sandra Lucrecia; Patriarca, Andrea Rosana; Fernández Pinto, Virginia
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Alternaria arborescens is the causal agent of tomato stem canker, a disease frequently responsible of substantial economic losses. A. arborescens can produce several mycotoxins, such as alternariol, alternariol monomethyl ether and tenuazonic acid and phytotoxins such as the AAL toxins. The objective of this study was to determine the effect of water activity (aw, 0.950, 0.975, 0.995) and temperature (6, 15, 20, 25 and 30 °C) on the germination and radial growth rate of A. arborescens on a synthetic tomato medium. Germination followed by growth was observed at all temperatures and aw levels analyzed. The shortest germination time (0.5 days) was observed at 0.995 aw, both at 25 °C and at 30 °C. The germination time increased with a reduction of aw and temperature. The highest growth rate was registered at 0.995 aw and 30 °C (7.21 mm/day) while the lowest occurred at 0.950 aw and 6 °C (0.52 mm/day), conditions at which the longest lag phase was observed (8 days). Growth rates increased with aw and temperature. Knowledge of the ecophysiology of the fungus in this substrate is necessary to formulate future strategies to prevent its development and evaluate the consumer health risk posed by potential exposure to the toxins.
Fil: Vaquera, Sandra Lucrecia. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Orgánica; Argentina
Fil: Patriarca, Andrea Rosana. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Orgánica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Micología y Botánica. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Micología y Botánica; Argentina
Fil: Fernández Pinto, Virginia. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Orgánica; Argentina
Materia
Ecofisiology
Alternaria
Arborescens
Growth
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/24022
Acceder
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network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Water activity and temperature effects on growth of Alternaria arborescens on tomato mediumVaquera, Sandra LucreciaPatriarca, Andrea RosanaFernández Pinto, VirginiaEcofisiologyAlternariaArborescensGrowthhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Alternaria arborescens is the causal agent of tomato stem canker, a disease frequently responsible of substantial economic losses. A. arborescens can produce several mycotoxins, such as alternariol, alternariol monomethyl ether and tenuazonic acid and phytotoxins such as the AAL toxins. The objective of this study was to determine the effect of water activity (aw, 0.950, 0.975, 0.995) and temperature (6, 15, 20, 25 and 30 °C) on the germination and radial growth rate of A. arborescens on a synthetic tomato medium. Germination followed by growth was observed at all temperatures and aw levels analyzed. The shortest germination time (0.5 days) was observed at 0.995 aw, both at 25 °C and at 30 °C. The germination time increased with a reduction of aw and temperature. The highest growth rate was registered at 0.995 aw and 30 °C (7.21 mm/day) while the lowest occurred at 0.950 aw and 6 °C (0.52 mm/day), conditions at which the longest lag phase was observed (8 days). Growth rates increased with aw and temperature. Knowledge of the ecophysiology of the fungus in this substrate is necessary to formulate future strategies to prevent its development and evaluate the consumer health risk posed by potential exposure to the toxins.Fil: Vaquera, Sandra Lucrecia. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Orgánica; ArgentinaFil: Patriarca, Andrea Rosana. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Orgánica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Micología y Botánica. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Micología y Botánica; ArgentinaFil: Fernández Pinto, Virginia. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Orgánica; ArgentinaElsevier Science2014-06-13info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/24022Vaquera, Sandra Lucrecia; Patriarca, Andrea Rosana; Fernández Pinto, Virginia; Water activity and temperature effects on growth of Alternaria arborescens on tomato medium; Elsevier Science; International Journal of Food Microbiology; 185; 13-6-2014; 136-1390168-16051879-3460CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0168160514002918info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ijfoodmicro.2014.06.007info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T13:18:36Zoai:ri.conicet.gov.ar:11336/24022instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-10 13:18:37.365CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Water activity and temperature effects on growth of Alternaria arborescens on tomato medium
title Water activity and temperature effects on growth of Alternaria arborescens on tomato medium
spellingShingle Water activity and temperature effects on growth of Alternaria arborescens on tomato medium
Vaquera, Sandra Lucrecia
Ecofisiology
Alternaria
Arborescens
Growth
title_short Water activity and temperature effects on growth of Alternaria arborescens on tomato medium
title_full Water activity and temperature effects on growth of Alternaria arborescens on tomato medium
title_fullStr Water activity and temperature effects on growth of Alternaria arborescens on tomato medium
title_full_unstemmed Water activity and temperature effects on growth of Alternaria arborescens on tomato medium
title_sort Water activity and temperature effects on growth of Alternaria arborescens on tomato medium
dc.creator.none.fl_str_mv Vaquera, Sandra Lucrecia
Patriarca, Andrea Rosana
Fernández Pinto, Virginia
author Vaquera, Sandra Lucrecia
author_facet Vaquera, Sandra Lucrecia
Patriarca, Andrea Rosana
Fernández Pinto, Virginia
author_role author
author2 Patriarca, Andrea Rosana
Fernández Pinto, Virginia
author2_role author
author
dc.subject.none.fl_str_mv Ecofisiology
Alternaria
Arborescens
Growth
topic Ecofisiology
Alternaria
Arborescens
Growth
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Alternaria arborescens is the causal agent of tomato stem canker, a disease frequently responsible of substantial economic losses. A. arborescens can produce several mycotoxins, such as alternariol, alternariol monomethyl ether and tenuazonic acid and phytotoxins such as the AAL toxins. The objective of this study was to determine the effect of water activity (aw, 0.950, 0.975, 0.995) and temperature (6, 15, 20, 25 and 30 °C) on the germination and radial growth rate of A. arborescens on a synthetic tomato medium. Germination followed by growth was observed at all temperatures and aw levels analyzed. The shortest germination time (0.5 days) was observed at 0.995 aw, both at 25 °C and at 30 °C. The germination time increased with a reduction of aw and temperature. The highest growth rate was registered at 0.995 aw and 30 °C (7.21 mm/day) while the lowest occurred at 0.950 aw and 6 °C (0.52 mm/day), conditions at which the longest lag phase was observed (8 days). Growth rates increased with aw and temperature. Knowledge of the ecophysiology of the fungus in this substrate is necessary to formulate future strategies to prevent its development and evaluate the consumer health risk posed by potential exposure to the toxins.
Fil: Vaquera, Sandra Lucrecia. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Orgánica; Argentina
Fil: Patriarca, Andrea Rosana. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Orgánica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Micología y Botánica. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Micología y Botánica; Argentina
Fil: Fernández Pinto, Virginia. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Orgánica; Argentina
description Alternaria arborescens is the causal agent of tomato stem canker, a disease frequently responsible of substantial economic losses. A. arborescens can produce several mycotoxins, such as alternariol, alternariol monomethyl ether and tenuazonic acid and phytotoxins such as the AAL toxins. The objective of this study was to determine the effect of water activity (aw, 0.950, 0.975, 0.995) and temperature (6, 15, 20, 25 and 30 °C) on the germination and radial growth rate of A. arborescens on a synthetic tomato medium. Germination followed by growth was observed at all temperatures and aw levels analyzed. The shortest germination time (0.5 days) was observed at 0.995 aw, both at 25 °C and at 30 °C. The germination time increased with a reduction of aw and temperature. The highest growth rate was registered at 0.995 aw and 30 °C (7.21 mm/day) while the lowest occurred at 0.950 aw and 6 °C (0.52 mm/day), conditions at which the longest lag phase was observed (8 days). Growth rates increased with aw and temperature. Knowledge of the ecophysiology of the fungus in this substrate is necessary to formulate future strategies to prevent its development and evaluate the consumer health risk posed by potential exposure to the toxins.
publishDate 2014
dc.date.none.fl_str_mv 2014-06-13
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/11336/24022
Vaquera, Sandra Lucrecia; Patriarca, Andrea Rosana; Fernández Pinto, Virginia; Water activity and temperature effects on growth of Alternaria arborescens on tomato medium; Elsevier Science; International Journal of Food Microbiology; 185; 13-6-2014; 136-139
0168-1605
1879-3460
CONICET Digital
CONICET
url http://hdl.handle.net/11336/24022
identifier_str_mv Vaquera, Sandra Lucrecia; Patriarca, Andrea Rosana; Fernández Pinto, Virginia; Water activity and temperature effects on growth of Alternaria arborescens on tomato medium; Elsevier Science; International Journal of Food Microbiology; 185; 13-6-2014; 136-139
0168-1605
1879-3460
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0168160514002918
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ijfoodmicro.2014.06.007
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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