Phytophthora nicotianae causing root and stem rot on Dieffenbachia picta in Argentina

Autores
Palmucci, Hemilse; Grijalba, Pablo; Wolcan, Silvia María; Guillin, Eduardo; López, María; Herrera, Cecilia; Fantino, Elisa
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Dieffenbachia picta is a worldwide appreciated crop due to its ornamental value. In Argentina it is cultivated in warm provinces and in the outskirts of Buenos Aires city, where in spring 2007 a great amount of plants were lost in commercial greenhouses. Symptoms such as wilting and soaked lesions in the basal leaves began in four- to six-month-old plants causing plants to wilt due to basal stem and root rot processes. A Peronosporomycete was consistently isolated from diseased tissues. The pathogen was identified as Phytophthora nicotianae based on cultural characteristics, morphology of vegetative and reproductive structures, and on the analysis of the sequence of the nuclear ribosomal internal transcribed spacer (ITS) region. Pathogenicity tests were carried out and Koch’s postulates were fulfilled. In complementary studies, the dieffenbachia varieties Alex, Compact, Camilla and Marianne were susceptible to the infection caused by P. nicotianae, whereas Tropic snow (D. amonea) was resistant. This is the first report of P. nicotianae causing stem and root rot of D. picta in Argentina and in the Americas.
Dieffenbachia picta (“comigo-ninguém-pode”) é uma espécie difundida em todo o mundo devido ao seu valor ornamental. Na Argentina, é cultivada nas províncias de clima mais quente e nos arredores da cidade de Buenos Aires. Na primavera de 2007 um grande número de plantas apresentou sintomas de murcha e presença de lesões encharcadas (anasarca) nas folhas inferiores, principalmente em plantas de 4 a 6 meses de idade. Em seguida, constatou-se murcha da planta devido ao apodrecimento do caule e raiz. Um organismo peronosporomycete foi isolado de tecidos afetados. O patógeno foi identificado como Phytophthora nicotianae com base em características culturais, morfologia das estruturas vegetativas e reprodutivas, e testes moleculares baseados na sequência da região ITS do DNA ribossômico. Os testes de patogenicidade foram conduzidos e os postulados de Koch atendidos. Em estudos complementares, as variedades de D. picta Alex, Compact, Marianne e Camilla foram suscetíveis, enquanto a variedade Tropic snow (D. amoena) foi resistente. Este é o primeiro relato de P. nicotianae causando podridão radicular de Dieffenbachia picta na Argentina e nas Américas.
Materia
Ciencias de las Plantas, Botánica
Peronosporomycetes
plantas ornamentales
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc/4.0/
Repositorio
CIC Digital (CICBA)
Institución
Comisión de Investigaciones Científicas de la Provincia de Buenos Aires
OAI Identificador
oai:digital.cic.gba.gob.ar:11746/3999

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oai_identifier_str oai:digital.cic.gba.gob.ar:11746/3999
network_acronym_str CICBA
repository_id_str 9441
network_name_str CIC Digital (CICBA)
spelling Phytophthora nicotianae causing root and stem rot on Dieffenbachia picta in ArgentinaPalmucci, HemilseGrijalba, PabloWolcan, Silvia MaríaGuillin, EduardoLópez, MaríaHerrera, CeciliaFantino, ElisaCiencias de las Plantas, BotánicaPeronosporomycetesplantas ornamentalesDieffenbachia picta is a worldwide appreciated crop due to its ornamental value. In Argentina it is cultivated in warm provinces and in the outskirts of Buenos Aires city, where in spring 2007 a great amount of plants were lost in commercial greenhouses. Symptoms such as wilting and soaked lesions in the basal leaves began in four- to six-month-old plants causing plants to wilt due to basal stem and root rot processes. A Peronosporomycete was consistently isolated from diseased tissues. The pathogen was identified as Phytophthora nicotianae based on cultural characteristics, morphology of vegetative and reproductive structures, and on the analysis of the sequence of the nuclear ribosomal internal transcribed spacer (ITS) region. Pathogenicity tests were carried out and Koch’s postulates were fulfilled. In complementary studies, the dieffenbachia varieties Alex, Compact, Camilla and Marianne were susceptible to the infection caused by P. nicotianae, whereas Tropic snow (D. amonea) was resistant. This is the first report of P. nicotianae causing stem and root rot of D. picta in Argentina and in the Americas.Dieffenbachia picta (“comigo-ninguém-pode”) é uma espécie difundida em todo o mundo devido ao seu valor ornamental. Na Argentina, é cultivada nas províncias de clima mais quente e nos arredores da cidade de Buenos Aires. Na primavera de 2007 um grande número de plantas apresentou sintomas de murcha e presença de lesões encharcadas (anasarca) nas folhas inferiores, principalmente em plantas de 4 a 6 meses de idade. Em seguida, constatou-se murcha da planta devido ao apodrecimento do caule e raiz. Um organismo peronosporomycete foi isolado de tecidos afetados. O patógeno foi identificado como Phytophthora nicotianae com base em características culturais, morfologia das estruturas vegetativas e reprodutivas, e testes moleculares baseados na sequência da região ITS do DNA ribossômico. Os testes de patogenicidade foram conduzidos e os postulados de Koch atendidos. Em estudos complementares, as variedades de D. picta Alex, Compact, Marianne e Camilla foram suscetíveis, enquanto a variedade Tropic snow (D. amoena) foi resistente. Este é o primeiro relato de P. nicotianae causando podridão radicular de Dieffenbachia picta na Argentina e nas Américas.Brazilian Phytopathological Society2011info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttps://digital.cic.gba.gob.ar/handle/11746/3999enginfo:eu-repo/semantics/altIdentifier/issn/1983-2052info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc/4.0/reponame:CIC Digital (CICBA)instname:Comisión de Investigaciones Científicas de la Provincia de Buenos Airesinstacron:CICBA2025-09-29T13:39:58Zoai:digital.cic.gba.gob.ar:11746/3999Institucionalhttp://digital.cic.gba.gob.arOrganismo científico-tecnológicoNo correspondehttp://digital.cic.gba.gob.ar/oai/snrdmarisa.degiusti@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:94412025-09-29 13:39:59.129CIC Digital (CICBA) - Comisión de Investigaciones Científicas de la Provincia de Buenos Airesfalse
dc.title.none.fl_str_mv Phytophthora nicotianae causing root and stem rot on Dieffenbachia picta in Argentina
title Phytophthora nicotianae causing root and stem rot on Dieffenbachia picta in Argentina
spellingShingle Phytophthora nicotianae causing root and stem rot on Dieffenbachia picta in Argentina
Palmucci, Hemilse
Ciencias de las Plantas, Botánica
Peronosporomycetes
plantas ornamentales
title_short Phytophthora nicotianae causing root and stem rot on Dieffenbachia picta in Argentina
title_full Phytophthora nicotianae causing root and stem rot on Dieffenbachia picta in Argentina
title_fullStr Phytophthora nicotianae causing root and stem rot on Dieffenbachia picta in Argentina
title_full_unstemmed Phytophthora nicotianae causing root and stem rot on Dieffenbachia picta in Argentina
title_sort Phytophthora nicotianae causing root and stem rot on Dieffenbachia picta in Argentina
dc.creator.none.fl_str_mv Palmucci, Hemilse
Grijalba, Pablo
Wolcan, Silvia María
Guillin, Eduardo
López, María
Herrera, Cecilia
Fantino, Elisa
author Palmucci, Hemilse
author_facet Palmucci, Hemilse
Grijalba, Pablo
Wolcan, Silvia María
Guillin, Eduardo
López, María
Herrera, Cecilia
Fantino, Elisa
author_role author
author2 Grijalba, Pablo
Wolcan, Silvia María
Guillin, Eduardo
López, María
Herrera, Cecilia
Fantino, Elisa
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias de las Plantas, Botánica
Peronosporomycetes
plantas ornamentales
topic Ciencias de las Plantas, Botánica
Peronosporomycetes
plantas ornamentales
dc.description.none.fl_txt_mv Dieffenbachia picta is a worldwide appreciated crop due to its ornamental value. In Argentina it is cultivated in warm provinces and in the outskirts of Buenos Aires city, where in spring 2007 a great amount of plants were lost in commercial greenhouses. Symptoms such as wilting and soaked lesions in the basal leaves began in four- to six-month-old plants causing plants to wilt due to basal stem and root rot processes. A Peronosporomycete was consistently isolated from diseased tissues. The pathogen was identified as Phytophthora nicotianae based on cultural characteristics, morphology of vegetative and reproductive structures, and on the analysis of the sequence of the nuclear ribosomal internal transcribed spacer (ITS) region. Pathogenicity tests were carried out and Koch’s postulates were fulfilled. In complementary studies, the dieffenbachia varieties Alex, Compact, Camilla and Marianne were susceptible to the infection caused by P. nicotianae, whereas Tropic snow (D. amonea) was resistant. This is the first report of P. nicotianae causing stem and root rot of D. picta in Argentina and in the Americas.
Dieffenbachia picta (“comigo-ninguém-pode”) é uma espécie difundida em todo o mundo devido ao seu valor ornamental. Na Argentina, é cultivada nas províncias de clima mais quente e nos arredores da cidade de Buenos Aires. Na primavera de 2007 um grande número de plantas apresentou sintomas de murcha e presença de lesões encharcadas (anasarca) nas folhas inferiores, principalmente em plantas de 4 a 6 meses de idade. Em seguida, constatou-se murcha da planta devido ao apodrecimento do caule e raiz. Um organismo peronosporomycete foi isolado de tecidos afetados. O patógeno foi identificado como Phytophthora nicotianae com base em características culturais, morfologia das estruturas vegetativas e reprodutivas, e testes moleculares baseados na sequência da região ITS do DNA ribossômico. Os testes de patogenicidade foram conduzidos e os postulados de Koch atendidos. Em estudos complementares, as variedades de D. picta Alex, Compact, Marianne e Camilla foram suscetíveis, enquanto a variedade Tropic snow (D. amoena) foi resistente. Este é o primeiro relato de P. nicotianae causando podridão radicular de Dieffenbachia picta na Argentina e nas Américas.
description Dieffenbachia picta is a worldwide appreciated crop due to its ornamental value. In Argentina it is cultivated in warm provinces and in the outskirts of Buenos Aires city, where in spring 2007 a great amount of plants were lost in commercial greenhouses. Symptoms such as wilting and soaked lesions in the basal leaves began in four- to six-month-old plants causing plants to wilt due to basal stem and root rot processes. A Peronosporomycete was consistently isolated from diseased tissues. The pathogen was identified as Phytophthora nicotianae based on cultural characteristics, morphology of vegetative and reproductive structures, and on the analysis of the sequence of the nuclear ribosomal internal transcribed spacer (ITS) region. Pathogenicity tests were carried out and Koch’s postulates were fulfilled. In complementary studies, the dieffenbachia varieties Alex, Compact, Camilla and Marianne were susceptible to the infection caused by P. nicotianae, whereas Tropic snow (D. amonea) was resistant. This is the first report of P. nicotianae causing stem and root rot of D. picta in Argentina and in the Americas.
publishDate 2011
dc.date.none.fl_str_mv 2011
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 https://digital.cic.gba.gob.ar/handle/11746/3999
url https://digital.cic.gba.gob.ar/handle/11746/3999
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1983-2052
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc/4.0/
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc/4.0/
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Brazilian Phytopathological Society
publisher.none.fl_str_mv Brazilian Phytopathological Society
dc.source.none.fl_str_mv reponame:CIC Digital (CICBA)
instname:Comisión de Investigaciones Científicas de la Provincia de Buenos Aires
instacron:CICBA
reponame_str CIC Digital (CICBA)
collection CIC Digital (CICBA)
instname_str Comisión de Investigaciones Científicas de la Provincia de Buenos Aires
instacron_str CICBA
institution CICBA
repository.name.fl_str_mv CIC Digital (CICBA) - Comisión de Investigaciones Científicas de la Provincia de Buenos Aires
repository.mail.fl_str_mv marisa.degiusti@sedici.unlp.edu.ar
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