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| Lombard, L.; Rodas, C.A.; Crous, P.W.; Wingfield, B.D.; Wingfield, M.J.. |
| Calonectria (Ca.) species and their Cylindrocladium (Cy.) anamorphs are well-known pathogens of forest nursery plants in subtropical and tropical areas of the world. An investigation of the mortality of rooted Pinus cuttings in a commercial forest nursery in Colombia led to the isolation of two Cylindrocladium anamorphs of Calonectria species. The aim of this study was to identify these species using DNA sequence data and morphological comparisons. Two species were identified, namely one undescribed species, and Cy. gracile, which is allocated to Calonectria as Ca. brassicae. The new species, Ca. brachiatica, resides in the Ca. brassicae species complex. Pathogenicity tests with Ca. brachiatica and Ca. brassicae showed that both are able to cause disease... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Β-tubulin; Calonectria; Cylindrocladium; Histone; Pinus; Root disease. |
| Ano: 2009 |
URL: http://www.repository.naturalis.nl/record/532052 |
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| Fischer,Ivan Herman; Sampaio,Aloísio Costa; Bertani,Rosemary Marques de Almeida; Gonçalves,Bruno Henrique Leite; Feichtenberger,Eduardo. |
| Abstract The present study evaluated the aggressiveness of Phytophthora cinnamomi isolates and the effect of pathogen inoculum concentration and periods of substrate flooding on root rot and plant development. Twelve pathogen isolates were inoculated on the collar region of avocado seedlings with or without wounding. Only 31.3% of the inoculated plants without wounding developed lesions, compared to 100% of the plants with wounding, while the isolates showed different aggressiveness levels. Avocado seedlings had their substrate inoculated with 0, 0.1% and 1.0% (m/v) wheat seeds colonized by the pathogen per pot, and four periods of 0, 12 and 24 h substrate flooding were produced at fortnightly intervals. The assessed parameters were number of leaves per... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Persea americana; Root disease; Soil flooding. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452020000600401 |
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