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| Registros recuperados : 1.989 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
27/02/2014 |
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Data da última atualização: |
27/02/2014 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
PEIXOTO, C. N.; OTTONI, G.; FILIPPI, M. C. C.; SILVA-LOBO, V. L.; PRABHU, A. S. |
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Afiliação: |
CECÍLIA N. PEIXOTO, UFG; GISELLE OTTONI, UFG; MARTA CRISTINA CORSI DE FILIPPI, CNPAF; VALACIA LEMES DA SILVA LOBO, CNPAF; ANNE SITARAMA PRABHU, CNPAF. |
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Título: |
Biology of Gaeumannomyces graminis var. graminis isolates from rice and grasses and epidemiological aspects of crown sheath rot of rice. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Tropical Plant Pathology, Brasília, DF, v. 38, n. 6, p. 495-504, nov./dez. 2013. |
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Idioma: |
Inglês |
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Conteúdo: |
A collection of Gaeumannomyces graminis var. graminis isolates obtained from symptomatic rice and grass plants in central and northern Brazil were studied in regard to pathogenicity on rice and cultural characteristics. For all isolates, only one type of lobed hyphopodia was observed both in the field and artificially inoculated plants. Perithecia were formed on artificial media and inoculated leaf sheaths. Hyphopodia were formed from ascosporic germ tubes. The hyphae under moist stress conditions produced dark brown chlamydospores that were initially hyaline. Large variation in the number of chlamydospores produced and duration of perithecia formation was observed among the isolates. Pathogenicity assays showed that 60-day old rice plants were more susceptible than 35-day old plants. The isolates from rice and grasses varied significantly in regard to disease severity on both rice seedlings and adult rice plants. In general, the isolates from rice were more aggressive than the isolates from grasses. Spontaneous infection of rice plants by ascosporic inoculum from perithecia on rice stubbles was observed in the greenhouse, suggesting their role as a source of primary inoculum in the field, which deserves further investigation. |
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Thesagro: |
Doença de planta; Fungo; Gaeumannomyces graminis; Oryza sativa. |
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Categoria do assunto: |
H Saúde e Patologia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/98356/1/tppv38.pdf
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Marc: |
LEADER 01938naa a2200217 a 4500
001 1981369
005 2014-02-27
008 2013 bl uuuu u00u1 u #d
100 1 $aPEIXOTO, C. N.
245 $aBiology of Gaeumannomyces graminis var. graminis isolates from rice and grasses and epidemiological aspects of crown sheath rot of rice.
260 $c2013
520 $aA collection of Gaeumannomyces graminis var. graminis isolates obtained from symptomatic rice and grass plants in central and northern Brazil were studied in regard to pathogenicity on rice and cultural characteristics. For all isolates, only one type of lobed hyphopodia was observed both in the field and artificially inoculated plants. Perithecia were formed on artificial media and inoculated leaf sheaths. Hyphopodia were formed from ascosporic germ tubes. The hyphae under moist stress conditions produced dark brown chlamydospores that were initially hyaline. Large variation in the number of chlamydospores produced and duration of perithecia formation was observed among the isolates. Pathogenicity assays showed that 60-day old rice plants were more susceptible than 35-day old plants. The isolates from rice and grasses varied significantly in regard to disease severity on both rice seedlings and adult rice plants. In general, the isolates from rice were more aggressive than the isolates from grasses. Spontaneous infection of rice plants by ascosporic inoculum from perithecia on rice stubbles was observed in the greenhouse, suggesting their role as a source of primary inoculum in the field, which deserves further investigation.
650 $aDoença de planta
650 $aFungo
650 $aGaeumannomyces graminis
650 $aOryza sativa
700 1 $aOTTONI, G.
700 1 $aFILIPPI, M. C. C.
700 1 $aSILVA-LOBO, V. L.
700 1 $aPRABHU, A. S.
773 $tTropical Plant Pathology, Brasília, DF$gv. 38, n. 6, p. 495-504, nov./dez. 2013.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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