| Registro completo |
| Provedor de dados: |
Agronomy
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| País: |
Brazil
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| Título: |
Resistance to triazole fungicides in Pyricularia species associated with invasive plants from wheat fields in Brazil
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| Autores: |
Dorigan, Adriano Francis
Carvalho, Giselle de
Poloni, Nadia Maria
Negrisoli, Matheus Mereb
Maciel, João Leodato Nunes
Ceresini, Paulo Cezar
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| Data: |
2019-05-24
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| Ano: |
2019
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| Palavras-chave: |
5.01.02.01-0 blast disease
CYP51A gene
Sterol demethylation inhibitor (DMI) fungicides
Epoxiconazole
Tebuconazole Resistência a fungicidas na agricultura / Fungicide resistance in agriculture
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| Resumo: |
Triazole fungicides have not been effective for managing the wheat blast disease in Brazil. A broad analysis across six geographical populations of Pyricularia graminis-tritici in central-southern Brazil indicated a high level of resistance to triazole fungicides. Since P. graminis-tritici is also associated with others poaceous species, here, we analyzed whether triazole-resistant isolates of the blast pathogen could be recovered from other poaceous hosts that are invasive of sprayed wheat fields. In addition to P. graminis-tritici (Pygt), we also evaluated the levels of sensitivity of three other grass-associated blast pathogens, which included P. grisea (Pg), P. pennisetigena (Pp), and P. urashimae (Pu). Resistance to the triazole fungicides tebuconazole and epoxiconazole was assessed phenotypically based on EC50 values and molecularly by analysis of the presence of mutations in the CYP51A gene, which encodes for the target enzyme 14-alpha-demethylase. We detected triazole-resistant Pyricularia spp. (Pg, Pp, Pu and Pygt) that is associated with Avena sativa, Cenchrus echinatus, Chloris distichophylla, Cynodon sp., Digitaria horizontalis, D. sanguinalis, Panicum maximum or Urochloa spp. The major outcome from our study was the evidence that invasive poaceous species from wheat fields could be an important source of triazole resistant fungal inoculum for the initial phases of the wheat blast epidemics.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39332
10.4025/actasciagron.v41i1.39332
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| Editor: |
Universidade Estadual de Maringá
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| Relação: |
http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39332/pdf
http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/downloadSuppFile/39332/15914
http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/downloadSuppFile/39332/15915
http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/downloadSuppFile/39332/15917
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| Formato: |
application/pdf
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| Fonte: |
Acta Scientiarum. Agronomy; v. 41 (2019): Publicação Contínua; e39332
Acta Scientiarum. Agronomy; v. 41 (2019): Publicação Contínua; e39332
1807-8621
1679-9275
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| Direitos: |
Direitos autorais 2019 Acta Scientiarum. Agronomy
http://creativecommons.org/licenses/by/4.0
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