Please use this identifier to cite or link to this item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/981369
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dc.contributor.authorPEIXOTO, C. N.pt_BR
dc.contributor.authorOTTONI, G.pt_BR
dc.contributor.authorFILIPPI, M. C. C.pt_BR
dc.contributor.authorSILVA-LOBO, V. L.pt_BR
dc.contributor.authorPRABHU, A. S.pt_BR
dc.date.accessioned2014-02-27T11:11:11Zpt_BR
dc.date.available2014-02-27T11:11:11Zpt_BR
dc.date.created2014-02-27pt_BR
dc.date.issued2013pt_BR
dc.identifier.citationTropical Plant Pathology, Brasília, DF, v. 38, n. 6, p. 495-504, nov./dez. 2013.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/981369pt_BR
dc.descriptionA 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.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.titleBiology of Gaeumannomyces graminis var. graminis isolates from rice and grasses and epidemiological aspects of crown sheath rot of rice.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2014-02-27T11:11:11Zpt_BR
dc.subject.thesagroDoença de plantapt_BR
dc.subject.thesagroOryza sativapt_BR
dc.subject.thesagroFungopt_BR
dc.subject.thesagroGaeumannomyces graminispt_BR
riaa.ainfo.id981369pt_BR
riaa.ainfo.lastupdate2014-02-27pt_BR
dc.contributor.institutionCECÍLIA N. PEIXOTO, UFG; GISELLE OTTONI, UFG; MARTA CRISTINA CORSI DE FILIPPI, CNPAF; VALACIA LEMES DA SILVA LOBO, CNPAF; ANNE SITARAMA PRABHU, CNPAF.pt_BR
Appears in Collections:Artigo em periódico indexado (CNPAF)

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