Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 65
Primeira ... 1234 ... Última
Imagem não selecionada

Imprime registro no formato completo
Two new Ophiostoma species from Protea caffra in Zambia Naturalis
Roets, F.; Wingfield, B.D.; Beer, Z.W. de; Wingfield, M.J.; Dreyer, L.L..
The genus Ophiostoma (Ophiostomatales) has a global distribution and species are best known for their association with bark beetles (Curculionidae: Scolytinae) on conifers. An unusual assemblage of these fungi is closely associated with the African endemic plant genus Protea (Proteaceae). Protea-associated Ophiostoma species are ecologically atypical as they colonise the fruiting structures of various serotinous Protea species. Seven species have been described from this niche in South Africa. It has been speculated that novel species may be present in other African countries where these host plants also occur. This view was corroborated by recent collections of two unknown species from Protea caffra trees in Zambia. In the present study we evaluate the...
Tipo: Article / Letter to the editor Palavras-chave: Β-tubulin; ITS; Ophiostoma; Phylogeny; Protea; Taxonomy.
Ano: 2010 URL: http://www.repository.naturalis.nl/record/532360
Imagem não selecionada

Imprime registro no formato completo
Two new species of Metrosideros (Myrtaceae) from New Caledonia: dual characterisation with morphology and nrDNA sequence variation Naturalis
Dawson, John W.; Whitaker, Anthony H.; Whitaker, Vivienne A.; Gardner, Richard C.; Wright, Shane D..
We have identified two new species of Metrosideros subg. Mearnsia (Myrtaceae) growing on, and apparently endemic to, the massif known as the Roches d’Ouaïème in New Caledonia. Of these two species, we include M. whitakeri in sect. Mearnsia and M. rotundifolia in sect. Calyptropelala. Both morphological assessments and phylogenetic analyses based on nrDNA sequence variation produced congruent interpretations of the novelty of the new species and of their classification.
Tipo: Article / Letter to the editor Palavras-chave: ITS; Metrosideros; Mearnsia; Myrtaceae; Nuclear rDNA.
Ano: 2000 URL: http://www.repository.naturalis.nl/record/526039
Imagem não selecionada

Imprime registro no formato completo
VARIABILIDAD MOLECULAR EN AISLAMIENTOS DE Phytophthora nicotianae VAN BREDA DE HAAN Rev. Protección Veg.
Peteira,Belkis; Toledo,Verónica; Martínez,B.
La pata prieta, causada por el patógeno Phytophthora nicotianae es una de las enfermedades fungosas importantes que atacan al cultivo del tabaco. Para apoyar de manera racional el programa de mejoramiento del cultivo para la obtención de variedades resistentes se hace necesario el conocimiento de la variabilidad de los aislamientos del patógeno. Las técnicas moleculares son una herramienta útil en tal sentido. Se caracterizaron a través ITS y corte de los fragmentos ITS amplificados y de RAPDs, un grupo de 50 aislamientos representativos de diferentes regiones del país, razas y características culturales. Los ITS rindieron un producto para todos los aislamientos de 850pb y la digestión de los mismos solo fue posible con la enzima MspI. A pesar de obtenerse...
Tipo: Journal article Palavras-chave: Phytophthora nicotianae; Caracterización molecular; RAPD; ITS.
Ano: 2008 URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S1010-27522008000300008
Imagem não selecionada

Imprime registro no formato completo
Why everlastings don’t last Naturalis
Crous, P.W.; Groenewald, J.Z..
The Cape Floral Region represents one of the world’s biodiversity hot spots, with a high level of plant, animal and insect endemism. The fungi occurring in this region, however, remain poorly studied. It is widely postulated that each plant species should harbour at least five to six unique fungal species, a number that we regard to be a huge underestimate. To test this hypothesis, we decided to study a single senescent flower of Phaenocoma prolifera (‘everlasting’; Asteraceae) collected in South Africa, and posed the question as to how many different species of fungi could be isolated and cultivated from 10 leaf bracts. Using a damp chamber technique, numerous microfungi could be induced to sporulate, enabling most of them to be successfully isolated on...
Tipo: Article / Letter to the editor Palavras-chave: Batcheloromyces; Catenulostroma; Cladosporium; Devriesia; Exophiala; ITS; LSU; Penicillium; Penidiella; Phaenocoma prolifera; Systematics; Teratosphaeria; Toxicocladosporium; Xenophacidiella.
Ano: 2011 URL: http://www.repository.naturalis.nl/record/531877
Imagem não selecionada

Imprime registro no formato completo
Zymoseptoria gen. nov.: a new genus to accommodate Septoria-like species occurring on graminicolous hosts Naturalis
Quaedvlieg, W.; Kema, G.H.J.; Groenewald, J.Z.; Verkley, G.J.M.; Seifbarghi, S.; Razavi, M.; Mirzadi Gohari, A.; Mehrabi, R.; Crous, P.W..
The Mycosphaerella complex is both poly- and paraphyletic, containing several different families and genera. The genus Mycosphaerella is restricted to species with Ramularia anamorphs, while Septoria is restricted to taxa that cluster with the type species of Septoria, S. cytisi, being closely related to Cercospora in the Mycosphaerellaceae. Species that occur on graminicolous hosts represent an as yet undescribed genus, for which the name Zymoseptoria is proposed. Based on the 28S nrDNA phylogeny derived in this study, Zymoseptoria is shown to cluster apart from Septoria. Morphologically species of Zymoseptoria can also be distinguished by their yeast-like growth in culture, and the formation of different conidial types that are absent in Septoria s.str....
Tipo: Article / Letter to the editor Palavras-chave: Hordeum vulgare; ITS; LSU; Multilocus sequence typing; Mycosphaerella; Septoria; Systematics; Triticum aestivum.
Ano: 2011 URL: http://www.repository.naturalis.nl/record/532144
Registros recuperados: 65
Primeira ... 1234 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional