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Jung, T.; Pérez-Sierra, A.; Durán, A.; Horta Jung, M.; Balci, Y.; Scanu, B.. |
Most members of the oomycete genus Phytophthora are primary plant pathogens. Both soil- and airborne Phytophthora species are able to survive adverse environmental conditions with enduring resting structures, mainly sexual oospores, vegetative chlamydospores and hyphal aggregations. Soilborne Phytophthora species infect fine roots and the bark of suberized roots and the collar region with motile biflagellate zoospores released from sporangia during wet soil conditions. Airborne Phytophthora species infect leaves, shoots, fruits and bark of branches and stems with caducous sporangia produced during humid conditions on infected plant tissues and dispersed by rain and wind splash. During the past six decades, the number of previously unknown Phytophthora... |
Tipo: Article / Letter to the editor |
Palavras-chave: Disease management; Epidemic; Forest dieback; Invasive pathogens; Nursery infestation; Root rot. |
Ano: 2018 |
URL: http://www.repository.naturalis.nl/record/649734 |
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Jung, T.; Scanu, B.; Bakonyi, J.; Seress, D.; Kovács, G.M.; Durán, A.; Sanfuentes von Stowasser, E.; Schena, L.; Mosca, S.; Thu, P.Q.; Nguyen, C.M.; Fajardo, , S.; González, M.; Pérez-Sierra, A.; Rees, H.; Cravador, A.; Maia, C.; Horta Jung, M.. |
During various surveys of Phytophthora diversity in Europe, Chile and Vietnam slow growing oomycete isolates were obtained from rhizosphere soil samples and small streams in natural and planted forest stands. Phylogenetic analyses of sequences from the nuclear ITS, LSU, β-tubulin and HSP90 loci and the mitochondrial cox1 and NADH1 genes revealed they belong to six new species of a new genus, officially described here as Nothophytophthora gen. nov., which clustered as sister group to Phytophthora. Nothophytophthora species share numerous morphological characters with Phytophthora: persistent (all Nothophytophthora spp.) and caducous (N. caduca, N. chlamydospora, N. valdiviana, N. vietnamensis) sporangia with variable shapes, internal differentiation of... |
Tipo: Article / Letter to the editor |
Palavras-chave: Breeding system; Caducity; Evolution; Oomycetes; Peronosporaceae; Phylogeny. |
Ano: 2017 |
URL: http://www.repository.naturalis.nl/record/635416 |
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Carmenate, M.; Arriaza, L.; Busutil, L.; Durán, A.; García, C.; García, I.. |
Se efectuó una campaña de muestreo en un tramo costero perteneciente a Boca de Jaruco, provincia La Habana. El objetivo fue determinar la calidad de las aguas de este sitio, sujeto a un intenso desarrollo industrial. En las siete estaciones escogidas se analizaron los principales indicadores físicos y químicos de calidad del agua, incluyendo hidrocarburos, debido a la cercanía de instalaciones petroleras. También se realizó el análisis cualitativo y cuantitativo de la comunidad de fitoplancton, la concentración de clorofila y el estado sanitario de las aguas mediante estimación de coliformes fecales y totales. De forma general se concluyó que las aguas se clasificaban de dudosa calidad según las normas cubanas de calidad para uso pesquero y mesotróficas,... |
Tipo: Preprint |
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Ano: 2010 |
URL: http://hdl.handle.net/1834/3565 |
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