Potential of Septoria araujiae (Capnodiales: Mycosphaerellaceae) as a classical biocontrol agent for moth plant, Araujia horto

Autores
Ramirez, Gustavo Hernán; Bianchinotti, Maria Virginia; Anderson, Freda Elizabeth
Año de publicación
2023
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Araujia hortorum (Apocynaceae) is native to Argentina where it is appreciated for its medicinal, nutritional, and ornamental value. In several countries where it has been introduced for the latter, it has become an invasive weed, and in the case of New Zealand it has been declared a target for classical biological control. The rust fungus Puccinia araujiae is, to date, the most studied of its fungal pathogens and shows very good prospects as a biocontrol agent. Nevertheless, little is known about the other pathogens that affect this plant in its native range. Studies are being conducted to build a body of knowledge on the fungal diseases affecting A. hortorum in Argentina. Surveys were carried out in the province of Buenos Aires in search of plants with symptoms of disease. In several populations across the province, plants were observed to be severely damaged by a foliar disease which was found to be associated to Septoria araujiae (Fungi, Ascomycota). Diseased plants exhibited extensive angular necrotic leaf spots, and in some cases, extensive necrotic areas on fruit surfaces. A detailed morphological description of the fungus was made, and its pathogenicity and specificity investigated, together with its penetration mode and the optimum incubation conditions for infection and disease to occur. To this end, artificial inoculations were performed on healthy plants of A. hortorum and nine other species within the Apocynaceae under controlled environmental conditions. All inoculated A. hortorum plants developed symptoms 14 days after inoculation at 20ºC. The fungus was re-isolated from affected leaves, thus fulfilling Koch´s postulates. Infection was shown to occur directly through the epidermis. Four other species belonging to the genera Araujia and Oxypetalum were found to be susceptible to the disease, indicating the fundamental host range of the pathogen is circumscribed to the subtribe Oxypetalinae. Septoria araujiae may be considered as a prospective biological control agent for A. hortorum due to its high virulence and its narrow host range. Furthermore, it was found to have quite a wider geographical distribution than P. araujiae in the province of Buenos Aires, indicating its ability to infect the host under a wider range of environmental conditions, and thus to impose a negative pressure on the host at locations where the rust may not. It is therefore suggested as an interesting potential complementary biocontrol agent.
Fil: Ramirez, Gustavo Hernán. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; Argentina
Fil: Bianchinotti, Maria Virginia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina
Fil: Anderson, Freda Elizabeth. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina
XVI International Symposium on Biological Control of Weeds
Puerto Iguazú
Argentina
Fundación para el estudio de especies invasivas
Centro de Recursos Naturales Renovables de la Zona Semiárida
Materia
SEPTORIA ARAUJIAE
BIOLOGICAL CONTROL AGENT
MOTH PLANT
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
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oai:ri.conicet.gov.ar:11336/257974
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network_name_str CONICET Digital (CONICET)
spelling Potential of Septoria araujiae (Capnodiales: Mycosphaerellaceae) as a classical biocontrol agent for moth plant, Araujia hortoRamirez, Gustavo HernánBianchinotti, Maria VirginiaAnderson, Freda ElizabethSEPTORIA ARAUJIAEBIOLOGICAL CONTROL AGENTMOTH PLANThttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Araujia hortorum (Apocynaceae) is native to Argentina where it is appreciated for its medicinal, nutritional, and ornamental value. In several countries where it has been introduced for the latter, it has become an invasive weed, and in the case of New Zealand it has been declared a target for classical biological control. The rust fungus Puccinia araujiae is, to date, the most studied of its fungal pathogens and shows very good prospects as a biocontrol agent. Nevertheless, little is known about the other pathogens that affect this plant in its native range. Studies are being conducted to build a body of knowledge on the fungal diseases affecting A. hortorum in Argentina. Surveys were carried out in the province of Buenos Aires in search of plants with symptoms of disease. In several populations across the province, plants were observed to be severely damaged by a foliar disease which was found to be associated to Septoria araujiae (Fungi, Ascomycota). Diseased plants exhibited extensive angular necrotic leaf spots, and in some cases, extensive necrotic areas on fruit surfaces. A detailed morphological description of the fungus was made, and its pathogenicity and specificity investigated, together with its penetration mode and the optimum incubation conditions for infection and disease to occur. To this end, artificial inoculations were performed on healthy plants of A. hortorum and nine other species within the Apocynaceae under controlled environmental conditions. All inoculated A. hortorum plants developed symptoms 14 days after inoculation at 20ºC. The fungus was re-isolated from affected leaves, thus fulfilling Koch´s postulates. Infection was shown to occur directly through the epidermis. Four other species belonging to the genera Araujia and Oxypetalum were found to be susceptible to the disease, indicating the fundamental host range of the pathogen is circumscribed to the subtribe Oxypetalinae. Septoria araujiae may be considered as a prospective biological control agent for A. hortorum due to its high virulence and its narrow host range. Furthermore, it was found to have quite a wider geographical distribution than P. araujiae in the province of Buenos Aires, indicating its ability to infect the host under a wider range of environmental conditions, and thus to impose a negative pressure on the host at locations where the rust may not. It is therefore suggested as an interesting potential complementary biocontrol agent.Fil: Ramirez, Gustavo Hernán. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; ArgentinaFil: Bianchinotti, Maria Virginia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; ArgentinaFil: Anderson, Freda Elizabeth. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; ArgentinaXVI International Symposium on Biological Control of WeedsPuerto IguazúArgentinaFundación para el estudio de especies invasivasCentro de Recursos Naturales Renovables de la Zona SemiáridaFundación para el Estudio de Especies Invasivas2023info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectSimposioBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/257974Potential of Septoria araujiae (Capnodiales: Mycosphaerellaceae) as a classical biocontrol agent for moth plant, Araujia horto; XVI International Symposium on Biological Control of Weeds; Puerto Iguazú; Argentina; 2023; 54-54978-631-90256-0-6CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.iobc-global.org/download/20230507-12_ISBCW_Iguazu_Proceedings.pdfInternacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:44:55Zoai:ri.conicet.gov.ar:11336/257974instacron: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:34982025-10-22 11:44:56.083CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Potential of Septoria araujiae (Capnodiales: Mycosphaerellaceae) as a classical biocontrol agent for moth plant, Araujia horto
title Potential of Septoria araujiae (Capnodiales: Mycosphaerellaceae) as a classical biocontrol agent for moth plant, Araujia horto
spellingShingle Potential of Septoria araujiae (Capnodiales: Mycosphaerellaceae) as a classical biocontrol agent for moth plant, Araujia horto
Ramirez, Gustavo Hernán
SEPTORIA ARAUJIAE
BIOLOGICAL CONTROL AGENT
MOTH PLANT
title_short Potential of Septoria araujiae (Capnodiales: Mycosphaerellaceae) as a classical biocontrol agent for moth plant, Araujia horto
title_full Potential of Septoria araujiae (Capnodiales: Mycosphaerellaceae) as a classical biocontrol agent for moth plant, Araujia horto
title_fullStr Potential of Septoria araujiae (Capnodiales: Mycosphaerellaceae) as a classical biocontrol agent for moth plant, Araujia horto
title_full_unstemmed Potential of Septoria araujiae (Capnodiales: Mycosphaerellaceae) as a classical biocontrol agent for moth plant, Araujia horto
title_sort Potential of Septoria araujiae (Capnodiales: Mycosphaerellaceae) as a classical biocontrol agent for moth plant, Araujia horto
dc.creator.none.fl_str_mv Ramirez, Gustavo Hernán
Bianchinotti, Maria Virginia
Anderson, Freda Elizabeth
author Ramirez, Gustavo Hernán
author_facet Ramirez, Gustavo Hernán
Bianchinotti, Maria Virginia
Anderson, Freda Elizabeth
author_role author
author2 Bianchinotti, Maria Virginia
Anderson, Freda Elizabeth
author2_role author
author
dc.subject.none.fl_str_mv SEPTORIA ARAUJIAE
BIOLOGICAL CONTROL AGENT
MOTH PLANT
topic SEPTORIA ARAUJIAE
BIOLOGICAL CONTROL AGENT
MOTH PLANT
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Araujia hortorum (Apocynaceae) is native to Argentina where it is appreciated for its medicinal, nutritional, and ornamental value. In several countries where it has been introduced for the latter, it has become an invasive weed, and in the case of New Zealand it has been declared a target for classical biological control. The rust fungus Puccinia araujiae is, to date, the most studied of its fungal pathogens and shows very good prospects as a biocontrol agent. Nevertheless, little is known about the other pathogens that affect this plant in its native range. Studies are being conducted to build a body of knowledge on the fungal diseases affecting A. hortorum in Argentina. Surveys were carried out in the province of Buenos Aires in search of plants with symptoms of disease. In several populations across the province, plants were observed to be severely damaged by a foliar disease which was found to be associated to Septoria araujiae (Fungi, Ascomycota). Diseased plants exhibited extensive angular necrotic leaf spots, and in some cases, extensive necrotic areas on fruit surfaces. A detailed morphological description of the fungus was made, and its pathogenicity and specificity investigated, together with its penetration mode and the optimum incubation conditions for infection and disease to occur. To this end, artificial inoculations were performed on healthy plants of A. hortorum and nine other species within the Apocynaceae under controlled environmental conditions. All inoculated A. hortorum plants developed symptoms 14 days after inoculation at 20ºC. The fungus was re-isolated from affected leaves, thus fulfilling Koch´s postulates. Infection was shown to occur directly through the epidermis. Four other species belonging to the genera Araujia and Oxypetalum were found to be susceptible to the disease, indicating the fundamental host range of the pathogen is circumscribed to the subtribe Oxypetalinae. Septoria araujiae may be considered as a prospective biological control agent for A. hortorum due to its high virulence and its narrow host range. Furthermore, it was found to have quite a wider geographical distribution than P. araujiae in the province of Buenos Aires, indicating its ability to infect the host under a wider range of environmental conditions, and thus to impose a negative pressure on the host at locations where the rust may not. It is therefore suggested as an interesting potential complementary biocontrol agent.
Fil: Ramirez, Gustavo Hernán. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; Argentina
Fil: Bianchinotti, Maria Virginia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina
Fil: Anderson, Freda Elizabeth. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina
XVI International Symposium on Biological Control of Weeds
Puerto Iguazú
Argentina
Fundación para el estudio de especies invasivas
Centro de Recursos Naturales Renovables de la Zona Semiárida
description Araujia hortorum (Apocynaceae) is native to Argentina where it is appreciated for its medicinal, nutritional, and ornamental value. In several countries where it has been introduced for the latter, it has become an invasive weed, and in the case of New Zealand it has been declared a target for classical biological control. The rust fungus Puccinia araujiae is, to date, the most studied of its fungal pathogens and shows very good prospects as a biocontrol agent. Nevertheless, little is known about the other pathogens that affect this plant in its native range. Studies are being conducted to build a body of knowledge on the fungal diseases affecting A. hortorum in Argentina. Surveys were carried out in the province of Buenos Aires in search of plants with symptoms of disease. In several populations across the province, plants were observed to be severely damaged by a foliar disease which was found to be associated to Septoria araujiae (Fungi, Ascomycota). Diseased plants exhibited extensive angular necrotic leaf spots, and in some cases, extensive necrotic areas on fruit surfaces. A detailed morphological description of the fungus was made, and its pathogenicity and specificity investigated, together with its penetration mode and the optimum incubation conditions for infection and disease to occur. To this end, artificial inoculations were performed on healthy plants of A. hortorum and nine other species within the Apocynaceae under controlled environmental conditions. All inoculated A. hortorum plants developed symptoms 14 days after inoculation at 20ºC. The fungus was re-isolated from affected leaves, thus fulfilling Koch´s postulates. Infection was shown to occur directly through the epidermis. Four other species belonging to the genera Araujia and Oxypetalum were found to be susceptible to the disease, indicating the fundamental host range of the pathogen is circumscribed to the subtribe Oxypetalinae. Septoria araujiae may be considered as a prospective biological control agent for A. hortorum due to its high virulence and its narrow host range. Furthermore, it was found to have quite a wider geographical distribution than P. araujiae in the province of Buenos Aires, indicating its ability to infect the host under a wider range of environmental conditions, and thus to impose a negative pressure on the host at locations where the rust may not. It is therefore suggested as an interesting potential complementary biocontrol agent.
publishDate 2023
dc.date.none.fl_str_mv 2023
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
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info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
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dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/257974
Potential of Septoria araujiae (Capnodiales: Mycosphaerellaceae) as a classical biocontrol agent for moth plant, Araujia horto; XVI International Symposium on Biological Control of Weeds; Puerto Iguazú; Argentina; 2023; 54-54
978-631-90256-0-6
CONICET Digital
CONICET
url http://hdl.handle.net/11336/257974
identifier_str_mv Potential of Septoria araujiae (Capnodiales: Mycosphaerellaceae) as a classical biocontrol agent for moth plant, Araujia horto; XVI International Symposium on Biological Control of Weeds; Puerto Iguazú; Argentina; 2023; 54-54
978-631-90256-0-6
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.iobc-global.org/download/20230507-12_ISBCW_Iguazu_Proceedings.pdf
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
dc.coverage.none.fl_str_mv Internacional
dc.publisher.none.fl_str_mv Fundación para el Estudio de Especies Invasivas
publisher.none.fl_str_mv Fundación para el Estudio de Especies Invasivas
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
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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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