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 | Acesso ao texto completo restrito à biblioteca da Embrapa Arroz e Feijão. Para informações adicionais entre em contato com cnpaf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
04/11/2022 |
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Data da última atualização: |
04/11/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
D'ÁVILA, L. S.; FILIPPI, M. C. C. de; CAFÉ-FILHO, A. C. |
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Afiliação: |
LETICIA SILVEIRA D'ÁVILA, UNIVERSIDADE DE BRASÍLIA; MARTA CRISTINA CORSI DE FILIPPI, CNPAF; ADALBERTO C. CAFÉ-FILHO, UNIVERSIDADE DE BRASÍLIA. |
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Título: |
Fungicide resistance in Pyricularia oryzae populations from southern and northern Brazil and evidence of fitness costs for QoI-resistant isolates. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Crop Protection, v. 153, 105887, Mar. 2022. |
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ISSN: |
0261-2194 |
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DOI: |
https://doi.org/10.1016/j.cropro.2021.105887 |
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Idioma: |
Inglês |
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Conteúdo: |
Rice blast management is heavily reliant on chemical control, and the rise of fungicide resistance is contingent on fitness costs. This study contrasts the responses of 322 blast isolates from southern (n = 224) and northern Brazil (n = 98) to fungicides in the Quinone outside inhibitor (QoI), Sterol demethylation inhibitor (DMI), and Melanin biosynthesis inhibitor (MBI) groups, and associated epidemiological traits. Resistance was more prevalent in northern Brazil, where conditions are most conducive to blast. Northern populations displayed higher EC50 for spore germination, faster mycelial growth rates, and higher rates of appressorium formation for fungicides in all chemical groups. Results were most striking for the QoI fungicide azoxystrobin. We examined possible fitness penalties and related in planta competitive abilities associated with the gain of azoxystrobin resistance. QoI-resistant (QoI-R) genotypes, carrying the G143A cytochrome b gene mutation, were found in 90% of the northern isolates. The EC50 values of these QoI-R isolates exceeded 10 ug L-1. However, QoI-R isolates had a reduced number of conidia, longer latent period, reduced infection efficiency and aggressiveness, compared to the sensitive isolates. These impairments were reflected in a decrease of competitive ability in planta in the absence of azoxystrobin. Nevertheless, under continuous fungicide applications, the proportion of resistant and sensitive isolates in mixed cultures in planta remained constant after four generations. The results are valuable for managing strategies as the increase of resistance may hamper the competitive abilities of QoI-R mutants in the absence of the respective active ingredient. MenosRice blast management is heavily reliant on chemical control, and the rise of fungicide resistance is contingent on fitness costs. This study contrasts the responses of 322 blast isolates from southern (n = 224) and northern Brazil (n = 98) to fungicides in the Quinone outside inhibitor (QoI), Sterol demethylation inhibitor (DMI), and Melanin biosynthesis inhibitor (MBI) groups, and associated epidemiological traits. Resistance was more prevalent in northern Brazil, where conditions are most conducive to blast. Northern populations displayed higher EC50 for spore germination, faster mycelial growth rates, and higher rates of appressorium formation for fungicides in all chemical groups. Results were most striking for the QoI fungicide azoxystrobin. We examined possible fitness penalties and related in planta competitive abilities associated with the gain of azoxystrobin resistance. QoI-resistant (QoI-R) genotypes, carrying the G143A cytochrome b gene mutation, were found in 90% of the northern isolates. The EC50 values of these QoI-R isolates exceeded 10 ug L-1. However, QoI-R isolates had a reduced number of conidia, longer latent period, reduced infection efficiency and aggressiveness, compared to the sensitive isolates. These impairments were reflected in a decrease of competitive ability in planta in the absence of azoxystrobin. Nevertheless, under continuous fungicide applications, the proportion of resistant and sensitive isolates in mixed cultures in planta remained co... Mostrar Tudo |
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Palavras-Chave: |
Trycyclazole. |
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Thesagro: |
Arroz; Brusone; Fungicida; Oryza Sativa; Pyricularia Oryzae. |
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Thesaurus Nal: |
Azoxystrobin; Blast disease; Fungicides; Magnaporthe oryzae; Rice; Tebuconazole; Trifloxystrobin. |
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Categoria do assunto: |
H Saúde e Patologia |
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Marc: |
LEADER 02684naa a2200325 a 4500
001 2148024
005 2022-11-04
008 2022 bl uuuu u00u1 u #d
022 $a0261-2194
024 7 $ahttps://doi.org/10.1016/j.cropro.2021.105887$2DOI
100 1 $aD'ÁVILA, L. S.
245 $aFungicide resistance in Pyricularia oryzae populations from southern and northern Brazil and evidence of fitness costs for QoI-resistant isolates.$h[electronic resource]
260 $c2022
520 $aRice blast management is heavily reliant on chemical control, and the rise of fungicide resistance is contingent on fitness costs. This study contrasts the responses of 322 blast isolates from southern (n = 224) and northern Brazil (n = 98) to fungicides in the Quinone outside inhibitor (QoI), Sterol demethylation inhibitor (DMI), and Melanin biosynthesis inhibitor (MBI) groups, and associated epidemiological traits. Resistance was more prevalent in northern Brazil, where conditions are most conducive to blast. Northern populations displayed higher EC50 for spore germination, faster mycelial growth rates, and higher rates of appressorium formation for fungicides in all chemical groups. Results were most striking for the QoI fungicide azoxystrobin. We examined possible fitness penalties and related in planta competitive abilities associated with the gain of azoxystrobin resistance. QoI-resistant (QoI-R) genotypes, carrying the G143A cytochrome b gene mutation, were found in 90% of the northern isolates. The EC50 values of these QoI-R isolates exceeded 10 ug L-1. However, QoI-R isolates had a reduced number of conidia, longer latent period, reduced infection efficiency and aggressiveness, compared to the sensitive isolates. These impairments were reflected in a decrease of competitive ability in planta in the absence of azoxystrobin. Nevertheless, under continuous fungicide applications, the proportion of resistant and sensitive isolates in mixed cultures in planta remained constant after four generations. The results are valuable for managing strategies as the increase of resistance may hamper the competitive abilities of QoI-R mutants in the absence of the respective active ingredient.
650 $aAzoxystrobin
650 $aBlast disease
650 $aFungicides
650 $aMagnaporthe oryzae
650 $aRice
650 $aTebuconazole
650 $aTrifloxystrobin
650 $aArroz
650 $aBrusone
650 $aFungicida
650 $aOryza Sativa
650 $aPyricularia Oryzae
653 $aTrycyclazole
700 1 $aFILIPPI, M. C. C. de
700 1 $aCAFÉ-FILHO, A. C.
773 $tCrop Protection$gv. 153, 105887, Mar. 2022.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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Biblioteca |
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| Registros recuperados : 432 | |
| 101. |  | CARVALHO, S. R. de; BRUAND, A.; HARDY, M.; LEPRUN, J.-C.; JAMAGNE, M. Tassement des sols ferrallitiques podzolico vermelho amarelo sous culture de canne à sucre (Etat de Rio de Janeiro, Brésil): apport d'une analyse de la porosité associée à une connaissance détaillée de la phase minérale. Cahiers ORSTOM. Série Pédologie, v. 26, n. 3, p. 195-212, 1991.| Tipo: Artigo em Periódico Indexado |
| Biblioteca(s): Embrapa Solos. |
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| 102. | | SOARES, A. S.; NASCIMENTO, W. M.; FREITAS, R. A.; CARVALHO, S. I. C. Tratamentos para melhoria da germinação de sementes de pimenta cumari verdadeira. Horticultura Brasileira, Brasília, DF, v. 24, n. 1, jul. 2006. Suplemento 1. Resumo 637. Trabalho apresentado no 46. Congresso Brasileiro de Olericultura, Goiânia, 2006. Publicado também como resumo expandido na Horticultura Brasileira, Brasília, DF, v. 24, n. 2, p. 2545, jul. 2006. Suplemento 2. CD-ROM.| Biblioteca(s): Embrapa Hortaliças. |
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| 103. | | FARIA, P. F. L.; CARVALHO, E. M. R. de; LIMA, C. R.; CARVALHO, S. R. de. Uso da cama de frango e da silagem de milho na alimentação de novilhas leiteiras durante a estação seca. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 10, n. 4, p. 37-41, 1975. (Zootecnia). Título em inglês: Corn silage and poultry litter for dairy heifers during the dry season.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 104. | | MARTINS, E. S.; QUEIROZ, P. R.; CARVALHO, S. E. S.; MONNERAT, R. G. Uso do DNAmt para a análise molecular de populações de Spodoptera frugiperda (J.E. Smith, 1797) (Lepidoptera:Noctuidae) das Américas. In: ENCONTRO DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA, 13., 2008, Brasília, DF. Anais: resumos dos trabalhos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2008. Resumo 116. p.161.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 106. | | EIRAS, M.; SILVA, S. R.; STUCHI, E. S.; TARGON, M. L. P. N.; CARVALHO, S. A. Viroides em citros. Tropical Plant Pathology, Brasília, DF, v. 34, n. 5, p. 275-296, set./oct. 2009. Revisão| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 2 |
| Biblioteca(s): Embrapa Mandioca e Fruticultura. |
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| 110. | | ELOY, J.; WEBER, D.; ALVARIZA, P.; CARVALHO, S. F. de; PICOLOTTO, L.; ANTUNES, L. E. C. Enraizamento de estacas herbáceas de mirtileiros da cultivar powder blue: influência das diferentes concentrações de ácido indolbutirico e tamanhos de estacas. In: CONGRESSO BRASILEIRO DE FRUTICULTURA, 22., 2012, Bento Gonçalves. Anais... Bento Gonçalves: SBF, 2012.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Clima Temperado. |
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| 114. | | CARVALHO, S. J. P. de; DIAS, A. C. R.; DARMIN, V.; NICOLAI, M.; CHRISTOFFOLETI, P. J. Glifosato aplicado com diferentes concentrações de uréia ou sulfato de amônio para dessecação de plantas daninhas. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 43, n. 11, p. 1501-1508, nov. 2008. Título em inglês: Glyphosate applied with different concentrations of urea or ammonium sulfate for weed desiccation.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 115. | | AMARAJL, P. A.; CARVALHO, S. F. de; WEBER, D.; PICOLOTTO, L.; ANTUNES, L. E. C. Desempenho de mudas de morangueiro cv. Strawberry festival em substratos com diferentes quantidades de esterco de Peru. In:SIMPÓSIO NACIONAL DO MORANGO, 6.; ENCONTRO SOBRE PEQUENAS FRUTAS E FRUTAS NATIVAS DO MERCOSUL, 5., 2012, Pelotas. Palestras e resumos... Pelotas: Embrapa Clima Temperado, 2012. 231 p. Organizadores: Marcia Vizzotto, Carlos Reisser Júnior, Rosa Lia Barbieri, Rodrigo Cezar Franzon.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Clima Temperado. |
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| 117. | | VAZ, V.; CARVALHO, S.; BENDAHAN, A. B.; POCCARD-CHAPUIS, R.; DUARTE, L. G.; TOURRAND, J. F. Livestock policy in the Brazilian Amazonia colonization. In: TOURRAND, J. F.; DUARTE, L. G.; VALARIÉ, P.; WAQUIL, P. D. Livestock Policy. [S.l.]: CIRAD, 2020.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Roraima. |
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| 119. | | CARVALHO, S. I. C.; PORTES, T. A.; KLUTHCOUSKI, J.; OLIVEIRA, I. P.; BUSO, L. H. Interferências do arroz, milho, sorgo e milheto sobre o crescimento de Brachiaria brizantha cv. Marandu, consorciados no Sistema Barreirão. In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 32., 1995, Brasília, DF. Anais... Brasília, DF: SBZ, 1995. p. 50-52.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Arroz e Feijão. |
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| Registros recuperados : 432 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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