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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/257974
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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 Técnicas2025-09-29T10:14:43Zoai: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:34982025-09-29 10:14:44.147CONICET 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 |
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2023 |
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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 |
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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 |
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eng |
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Internacional |
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Fundación para el Estudio de Especies Invasivas |
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Fundación para el Estudio de Especies Invasivas |
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