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Cylindrocarpon root rot: multi-gene analysis reveals novel species within the I...
Cabral, Ana; Groenewald, Johannes; Rego, Cecília; Oliveira, Helena; Crous, Pedro W.Abstract Ilyonectria radicicola and its Cylindrocarpon-like anamorph represent a species complex that is commonly associated with root rot disease symptoms on a range of hosts. During the course of this study, several species could be distinguished from I. radicicola sensu stricto based on morphological and culture characteristics. DNA sequence analysis of the partial β-tubulin, histone H3, translation elongati...
Phaemoniella chlamydospora infection induces changes in phenolic compounds cont...
Oliveira, Helena; Martin, Nico; Vesentini, Damiano; Rego, Cecilia; Monteiro, Sara; Ferreira, Ricardo BoavidaThe effect of Phaeomoniella chlamydospora infection was evaluated in three grapevine cultivars, in relation to the variation in phenolic compounds within the host. Young plants of Vitis vinifera (cv. Chardonnay, Touriga Nacional and two clones of cv. Aragonez) were infected using two strains of Pa. chlamydospora and were harvested after fi ve months from inoculation. Overall, a localised increment in the amount...
Control of grapevine wood fungi in commercial nurseries
Oliveira, Helena; Rego, Cecilia; Nascimento, Teresa; Cabral, Ana; Silva, Maria JoséPrevious surveys conducted in commercial nurseries found that different wood fungi, namely Cylindrocarpon spp., Botryosphaeriaceae, Phomopsis viticola and Phaeomoniella chlamydospora infect grapevine cuttings. Two fi eld trials were carried out to evaluate the effectiveness of cyprodinil + fl udioxonil, pyraclostrobin + metiram, fl udioxonil and cyprodinil to prevent or reduce natural infections caused by such ...
Interactions among grapevine disease-causing fungi. The role of reactive oxygen...
Oliveira, Helena; Freitas, Regina; Rego, Cecilia; Ferreira, Ricardo BoavidaBotryosphaeria parva, Eutypa lata and Phomopsis viticola are ascomyceteous fungi responsible for severe canker and dieback in numerous woody plants. In grapevine, these pathogens colonise the wood mainly through pruning wounds, and the diseases gradually develop, leading to partial or total vine death. In the present study, the three fungal species were grown in Czapek Dox modifi ed medium. Under these conditio...
Neonectria liriodendri sp. nov., the main causal agent of black foot disease of...
Oliveira, Helena; Halleen, Francois; Schroers, Hans-Josef; Groenewald, Johannes Z.; Rego, Cecilia; Crous, Pedro W.Black foot disease is a serious disease of grapevine crops in most areas where vines are grown. Mainly two species of Cylindrocarpon, C. destructans and C. macrodidymum, are associated with this disease. Recent studies have revealed a tremendous molecular variation within the former but only slight molecular variation within the latter, indicating that C. destructans presents a complex of several species The pr...
Obtenção in vitro do teleomorfo de Cylindrocarpon destructans, Neonectria Radic...
Oliveira, Helena; Rego, Cecilia; Cabral, A.; Nascimento, TeresaBlack-foot is an important grapevine disease, caused by the fungus Cylindrocarpon destructans, which causes a darkening of the basal-end of the plant, leading to early decline and death of young grapevines. Both, C. destructans and C. obtusisporum are considered responsible for this disease, although only the former was isolated in Portugal. Neonectria radicicola (teleomorph of C. destructans) is an Ascomycota ...
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