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Registro Completo |
Biblioteca(s): |
Embrapa Trigo. |
Data corrente: |
27/07/2023 |
Data da última atualização: |
27/07/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
ASCARI, J. P.; CAZÓN, L. I.; RAHNAMA, M.; LAMOUR, K.; FERNANDES, J. M. C.; FARMAN, M.; DEL PONTE, E. |
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. |
Título: |
Pyricularia are mostly host-specialized with limited reciprocal cross-infection between wheat and endemic grasses in Minas Gerais, Brazil. |
Ano de publicação: |
2023 |
Fonte/Imprenta: |
Phytopathology, 3 jul. 2023. Online ahead of print. |
DOI: |
https://doi.org/10.1094/PHYTO-01-23-0024-R |
Idioma: |
Inglês |
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 |
Palavras-Chave: |
Biologia de Populações; Fungal Pathogens; Gramíneas endêmicas; Patógenos fúngicos; Population Biology. |
Thesagro: |
Epidemiologia; Trigo. |
Thesaurus Nal: |
Epidemiology; Pyricularia; Wheat. |
Categoria do assunto: |
-- |
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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Registros recuperados : 5 | |
1. | | ASCARI, J. P.; FARMAN, M.; FERNANDES, J. M. C.; PONTE, E. M. D. Unravelling species and pathotypes diversity of Pyricularia blast pathogens affecting wheat and grasses in Minas Gerais Cerrado, Brazil. In: CONGRESSO BRASILEIRO DE FITOPATOLOGIA, 51., 2019, Recife. Anais... Brasília, DF: Sociedade Brasileira de Fitopatologia, 2019. p. 417.Tipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Trigo. |
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3. | | FARMAN, M.; PETERSON, G.; CHEN, L.; STARNES, J.; VALENT, B.; BACHI, P.; MURDOCK, L.; HERSHMAN, D.; PEDLEY, K.; FERNANDES, J. M. C.; BAVARESCO, J. The Lolium pathotype of Magnaporthe oryzae recovered from a single blasted wheat plant in the United States. Plant Disease, St. Paul, v. 101, n. 5, p. 684-692, May 2017.Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
Biblioteca(s): Embrapa Trigo. |
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5. | | GLADIEUX, P.; CONDON, B.; RAVEL, S.; SOANES, D.; MACIEL, J. L. N.; NHANI JUNIOR, A.; CHEN, L.; TERAUCHI, R.; LEBRUN, M.-H.; THARREAU, D.; MITCHELL, T.; PEDLEY, K. F.; VALENT, B.; TALBOT, N. J.; FARMAN, M.; FOURNIER, E. Gene flow between divergent cereal- and grass-specific lineages of the rice blast fungus Magnaporthe oryzae. mBio, v. 9, n. 1, e01219-17, Jan./Feb. 2018.Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
Biblioteca(s): Embrapa Agricultura Digital; Embrapa Trigo. |
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Registros recuperados : 5 | |
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Nenhum registro encontrado para a expressão de busca informada. |
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