<i>Phytophthora nicotianae</i> causing root and stem rot on <i>Dieffenbachia picta</i> in Argentina

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 i...

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Autores principales: Palmucci, Hemilse Elena, Grijalba, Pablo Esteban, Wolcan, Silvia María, Guillin, Eduardo, López, María Virginia, Herrera, Cecilia, Fantino, Elisa
Formato: Articulo Comunicacion
Lenguaje:Inglés
Publicado: 2011
Materias:
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/29016
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1982-56762011000500008&lng=en&nrm=iso
Aporte de:
id I19-R120-10915-29016
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Agrarias
Biología
Plantas
Argentina
Parásitos
ornamentals
peronosporomycetes
susceptibility
spellingShingle Ciencias Agrarias
Biología
Plantas
Argentina
Parásitos
ornamentals
peronosporomycetes
susceptibility
Palmucci, Hemilse Elena
Grijalba, Pablo Esteban
Wolcan, Silvia María
Guillin, Eduardo
López, María Virginia
Herrera, Cecilia
Fantino, Elisa
<i>Phytophthora nicotianae</i> causing root and stem rot on <i>Dieffenbachia picta</i> in Argentina
topic_facet Ciencias Agrarias
Biología
Plantas
Argentina
Parásitos
ornamentals
peronosporomycetes
susceptibility
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.
format Articulo
Comunicacion
author Palmucci, Hemilse Elena
Grijalba, Pablo Esteban
Wolcan, Silvia María
Guillin, Eduardo
López, María Virginia
Herrera, Cecilia
Fantino, Elisa
author_facet Palmucci, Hemilse Elena
Grijalba, Pablo Esteban
Wolcan, Silvia María
Guillin, Eduardo
López, María Virginia
Herrera, Cecilia
Fantino, Elisa
author_sort Palmucci, Hemilse Elena
title <i>Phytophthora nicotianae</i> causing root and stem rot on <i>Dieffenbachia picta</i> in Argentina
title_short <i>Phytophthora nicotianae</i> causing root and stem rot on <i>Dieffenbachia picta</i> in Argentina
title_full <i>Phytophthora nicotianae</i> causing root and stem rot on <i>Dieffenbachia picta</i> in Argentina
title_fullStr <i>Phytophthora nicotianae</i> causing root and stem rot on <i>Dieffenbachia picta</i> in Argentina
title_full_unstemmed <i>Phytophthora nicotianae</i> causing root and stem rot on <i>Dieffenbachia picta</i> in Argentina
title_sort <i>phytophthora nicotianae</i> causing root and stem rot on <i>dieffenbachia picta</i> in argentina
publishDate 2011
url http://sedici.unlp.edu.ar/handle/10915/29016
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1982-56762011000500008&lng=en&nrm=iso
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