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Registro Completo |
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Biblioteca(s): |
Embrapa Trigo. |
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Data corrente: |
27/07/2023 |
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Data da última atualização: |
27/07/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ASCARI, J. P.; CAZÓN, L. I.; RAHNAMA, M.; LAMOUR, K.; FERNANDES, J. M. C.; FARMAN, M.; DEL PONTE, E. |
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Afiliação: |
JOÃO PAULO ASCARI, Universidade Federal de Viçosa; LUIS IGNACIO CAZÓN, Universidade Federal de Viçosa; MOSTAFA RAHNAMA, Tennessee Tech University; KURT LAMOUR, University of Tennessee; JOSE MAURICIO CUNHA FERNANDES, CNPT; MARK FARMAN, University of Kentucky; EMERSON DEL PONTE, Universidade Federal de Viçosa. |
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Título: |
Pyricularia are mostly host-specialized with limited reciprocal cross-infection between wheat and endemic grasses in Minas Gerais, Brazil. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Phytopathology, 3 jul. 2023. Online ahead of print. |
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DOI: |
https://doi.org/10.1094/PHYTO-01-23-0024-R |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Wheat blast, caused by Pyricularia oryzae Triticum (PoT), is an emerging threat to global wheat production. Current understanding of the population biology of the pathogen and epidemiology of the disease has been based on phylogenomic studies that compared the wheat blast pathogen with isolates collected from grasses that were invasive to Brazilian wheat fields. In this study, we performed a comprehensive sampling of blast lesions in wheat crops and endemic grasses found in and away from wheat fields in Minas Gerais. A total 1,368 diseased samples were collected (976 leaves of wheat and grasses and 392 wheat heads) which yielded a working collection of 564 Pyricularia isolates. We show that, contrary to earlier implications, PoT was rarely found on endemic grasses and, conversely, members of grass-adapted lineages were rarely found on wheat. Instead, most lineages were host-specialized with constituent isolates usually grouping according to their host-of-origin. With regard to the dominant role proposed for signalgrass in wheat blast epidemiology, we found only one PoT member in 67 isolates collected from signalgrass grown away from wheat fields, and only three members of Urochloa-adapted lineages among hundreds of isolates from wheat. Cross-inoculation assays on wheat and a signalgrass used in pastures (U. brizantha) suggested that the limited cross-infection observed in the field may be due to innate compatibility differences. Whether or not the observed level of cross-infection would be sufficient to provide an inoculum reservoir, or serve as a bridge between wheat growing regions, is questionable and, therefore, deserves further investigation. MenosAbstract: Wheat blast, caused by Pyricularia oryzae Triticum (PoT), is an emerging threat to global wheat production. Current understanding of the population biology of the pathogen and epidemiology of the disease has been based on phylogenomic studies that compared the wheat blast pathogen with isolates collected from grasses that were invasive to Brazilian wheat fields. In this study, we performed a comprehensive sampling of blast lesions in wheat crops and endemic grasses found in and away from wheat fields in Minas Gerais. A total 1,368 diseased samples were collected (976 leaves of wheat and grasses and 392 wheat heads) which yielded a working collection of 564 Pyricularia isolates. We show that, contrary to earlier implications, PoT was rarely found on endemic grasses and, conversely, members of grass-adapted lineages were rarely found on wheat. Instead, most lineages were host-specialized with constituent isolates usually grouping according to their host-of-origin. With regard to the dominant role proposed for signalgrass in wheat blast epidemiology, we found only one PoT member in 67 isolates collected from signalgrass grown away from wheat fields, and only three members of Urochloa-adapted lineages among hundreds of isolates from wheat. Cross-inoculation assays on wheat and a signalgrass used in pastures (U. brizantha) suggested that the limited cross-infection observed in the field may be due to innate compatibility differences. Whether or not the observed level of... Mostrar Tudo |
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Palavras-Chave: |
Biologia de Populações; Fungal Pathogens; Gramíneas endêmicas; Patógenos fúngicos; Population Biology. |
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Thesagro: |
Epidemiologia; Trigo. |
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Thesaurus Nal: |
Epidemiology; Pyricularia; Wheat. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1155321/1/PYRICULARIA-ARE-MOSTLY-HOST.pdf
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Marc: |
LEADER 02678naa a2200325 a 4500
001 2155321
005 2023-07-27
008 2023 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1094/PHYTO-01-23-0024-R$2DOI
100 1 $aASCARI, J. P.
245 $aPyricularia are mostly host-specialized with limited reciprocal cross-infection between wheat and endemic grasses in Minas Gerais, Brazil.$h[electronic resource]
260 $c2023
520 $aAbstract: Wheat blast, caused by Pyricularia oryzae Triticum (PoT), is an emerging threat to global wheat production. Current understanding of the population biology of the pathogen and epidemiology of the disease has been based on phylogenomic studies that compared the wheat blast pathogen with isolates collected from grasses that were invasive to Brazilian wheat fields. In this study, we performed a comprehensive sampling of blast lesions in wheat crops and endemic grasses found in and away from wheat fields in Minas Gerais. A total 1,368 diseased samples were collected (976 leaves of wheat and grasses and 392 wheat heads) which yielded a working collection of 564 Pyricularia isolates. We show that, contrary to earlier implications, PoT was rarely found on endemic grasses and, conversely, members of grass-adapted lineages were rarely found on wheat. Instead, most lineages were host-specialized with constituent isolates usually grouping according to their host-of-origin. With regard to the dominant role proposed for signalgrass in wheat blast epidemiology, we found only one PoT member in 67 isolates collected from signalgrass grown away from wheat fields, and only three members of Urochloa-adapted lineages among hundreds of isolates from wheat. Cross-inoculation assays on wheat and a signalgrass used in pastures (U. brizantha) suggested that the limited cross-infection observed in the field may be due to innate compatibility differences. Whether or not the observed level of cross-infection would be sufficient to provide an inoculum reservoir, or serve as a bridge between wheat growing regions, is questionable and, therefore, deserves further investigation.
650 $aEpidemiology
650 $aPyricularia
650 $aWheat
650 $aEpidemiologia
650 $aTrigo
653 $aBiologia de Populações
653 $aFungal Pathogens
653 $aGramíneas endêmicas
653 $aPatógenos fúngicos
653 $aPopulation Biology
700 1 $aCAZÓN, L. I.
700 1 $aRAHNAMA, M.
700 1 $aLAMOUR, K.
700 1 $aFERNANDES, J. M. C.
700 1 $aFARMAN, M.
700 1 $aDEL PONTE, E.
773 $tPhytopathology, 3 jul. 2023. Online ahead of print.
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Embrapa Trigo (CNPT) |
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| 1. |  | SILVA, V. T.; SILVA, G. T.; LUCAS, N. F.; SCIVITTARO, W. B.; SOUSA, R. O. DE. Potencial de aquecimento global de cultivares de arroz sob irrigação por inundação contínua e intermitente. In: SEMANA INTEGRADA UFPEL, 6.; CONGRESSO DE INICIAÇÃO CIENTÍFICA, 19., 2020, Pelotas. [Anais... Pelotas: UFPel, 2020.]. 4 p. CIC.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Clima Temperado. |
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| 5. | | SCIVITTARO, W. B.; VEÇOZZI, T. A.; JARDIM, T. M.; LUCAS, N. F.; SILVA, M. A. S. da; MARCARENHAS, Y. S.; CARVALHO, M. T. de M.; MADARI, B. E.; CONCENÇO, G. Emissões de gases de efeito estufa do cultivo de arroz irrigado em ecossistemas subtropical e tropical. Pelotas: Embrapa Clima Temperado, 2019. 22 p. Embrapa Clima Temperado. Boletim de Pesquisa e Desenvolvimento, 324.)| Tipo: Boletim de Pesquisa e Desenvolvimento |
| Biblioteca(s): Embrapa Arroz e Feijão; Embrapa Clima Temperado. |
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