Rhizoctonia solani AG-1 IA infects both rice and signalgrass in the Colombian Llanos

Detalhes bibliográficos
Autor(a) principal: Ramos-molina, Lina Maria
Data de Publicação: 2016
Outros Autores: Chavarro-mesa, Edisson, Pereira, Danilo Augusto Dos Santos, Silva-herrera, María Del Rosario, Ceresini, Paulo Cezar
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1590/1983-40632016v4638696
http://hdl.handle.net/11449/157998
Resumo: ABSTRACT Foliar blight and death of signalgrass (Urochloa spp.) pastures are caused by the Rhizoctonia solani fungus. This study aimed at determining which pathogens from the Rhizoctonia species complex are associated with leaf and sheath blight in Urochloa and rice, in the Colombian Llanos. Sympatric areas of Urochloa pastures adjacent to rice cropping areas were sampled using a linear transect system. The pathogens were identified using morphological traits, molecular detection based on specific primers and sequencing of the ITS-5.8S rDNA region. R. solani AG-1 IA predominated as the pathogen associated with foliar blight in all samples from U. brizantha cv. 'Toledo' and hybrid Urochloa cv. 'Mulato'. Besides R. solani AG-1 IA (18 % of the samples), Rhizoctonia oryzae-sativae (71 %) and Sclerotium hydrophilum (11 %) were also detected. In the cross-pathogenicity test, the R. solani AG-1 IA fungus was the most aggressive to Urochloa, while R. oryzae-sativae produced very mild infection symptoms. This is the first report of R. oryzae-sativae and S. hydrophilum associated with the complex of rice sheath blight diseases in Colombia.
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spelling Rhizoctonia solani AG-1 IA infects both rice and signalgrass in the Colombian LlanosRhizoctonia solani AG-1 IA infecta arroz e braquiária nos Llanos ColombianosUrochloa spp.Rhizoctonia oryzae-sativaeSclerotium hydrophilumUrochloa spp.Rhizoctonia oryzaesativaeSclerotium hydrophilumABSTRACT Foliar blight and death of signalgrass (Urochloa spp.) pastures are caused by the Rhizoctonia solani fungus. This study aimed at determining which pathogens from the Rhizoctonia species complex are associated with leaf and sheath blight in Urochloa and rice, in the Colombian Llanos. Sympatric areas of Urochloa pastures adjacent to rice cropping areas were sampled using a linear transect system. The pathogens were identified using morphological traits, molecular detection based on specific primers and sequencing of the ITS-5.8S rDNA region. R. solani AG-1 IA predominated as the pathogen associated with foliar blight in all samples from U. brizantha cv. 'Toledo' and hybrid Urochloa cv. 'Mulato'. Besides R. solani AG-1 IA (18 % of the samples), Rhizoctonia oryzae-sativae (71 %) and Sclerotium hydrophilum (11 %) were also detected. In the cross-pathogenicity test, the R. solani AG-1 IA fungus was the most aggressive to Urochloa, while R. oryzae-sativae produced very mild infection symptoms. This is the first report of R. oryzae-sativae and S. hydrophilum associated with the complex of rice sheath blight diseases in Colombia.RESUMO A queima da folha e morte de pastagens do gênero Urochloa são causadas pelo fungo Rhizoctonia solani. Objetivou-se determinar que patógenos do complexo de espécies do gênero Rhizoctonia estão associados à queima da folha e bainha em Urochloa e arroz, nos Llanos Colombianos. Utilizando-se o sistema de transcetos lineares, foram amostradas áreas de pastagens de Urochloa simpátricas, adjacentes às de arroz. A identificação dos patógenos foi efetuada por caracterização morfológica, detecção molecular baseada em iniciadores específicos e sequenciamento da região ITS-5,8S do rDNA. R. solani AG-1 IA predominou como patógeno associado à queima da folha em todas as amostras de U. brizantha cv. 'Toledo' e híbrido Urochloa cv. 'Mulato'. Além de R. solani AG-1 IA (18 % das amostras), R. oryzae-sativae (71 %) e Sclerotium hydrophilum (11 %) também foram detectados. No teste de patogenicidade, o fungo R. solani AG-1 IA foi o mais agressivo a Urochloa, enquanto R. oryzae-sativae ocasionou sintomas muito leves de infecção. Este é o primeiro relato de que os fungos R. oryzae-sativae e S. hydrophilum estão associados ao complexo de doenças da bainha do arroz, na Colômbia.Universidade Estadual Paulista Departamento de Fitossanidade, Engenharia Rural e SolosETH Zurich Institute of Integrative Biology - Plant PathologyUniversidad de los LlanosUniversidade Estadual Paulista Departamento de Fitossanidade, Engenharia Rural e SolosEscola de Agronomia/UFGUniversidade Estadual Paulista (Unesp)ETH Zurich Institute of Integrative Biology - Plant PathologyUniversidad de los LlanosRamos-molina, Lina MariaChavarro-mesa, EdissonPereira, Danilo Augusto Dos SantosSilva-herrera, María Del RosarioCeresini, Paulo Cezar2018-11-12T17:27:53Z2018-11-12T17:27:53Z2016-03-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article65-71application/pdfhttp://dx.doi.org/10.1590/1983-40632016v4638696Pesquisa Agropecuária Tropical. Escola de Agronomia/UFG, v. 46, n. 1, p. 65-71, 2016.1983-4063http://hdl.handle.net/11449/15799810.1590/1983-40632016v4638696S1983-40632016000100065S1983-40632016000100065.pdf26350920583008540000-0003-2381-2792SciELOreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPesquisa Agropecuária Tropical0,346info:eu-repo/semantics/openAccess2023-10-24T06:13:21Zoai:repositorio.unesp.br:11449/157998Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:51:42.227254Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Rhizoctonia solani AG-1 IA infects both rice and signalgrass in the Colombian Llanos
Rhizoctonia solani AG-1 IA infecta arroz e braquiária nos Llanos Colombianos
title Rhizoctonia solani AG-1 IA infects both rice and signalgrass in the Colombian Llanos
spellingShingle Rhizoctonia solani AG-1 IA infects both rice and signalgrass in the Colombian Llanos
Ramos-molina, Lina Maria
Urochloa spp.
Rhizoctonia oryzae-sativae
Sclerotium hydrophilum
Urochloa spp.
Rhizoctonia oryzaesativae
Sclerotium hydrophilum
title_short Rhizoctonia solani AG-1 IA infects both rice and signalgrass in the Colombian Llanos
title_full Rhizoctonia solani AG-1 IA infects both rice and signalgrass in the Colombian Llanos
title_fullStr Rhizoctonia solani AG-1 IA infects both rice and signalgrass in the Colombian Llanos
title_full_unstemmed Rhizoctonia solani AG-1 IA infects both rice and signalgrass in the Colombian Llanos
title_sort Rhizoctonia solani AG-1 IA infects both rice and signalgrass in the Colombian Llanos
author Ramos-molina, Lina Maria
author_facet Ramos-molina, Lina Maria
Chavarro-mesa, Edisson
Pereira, Danilo Augusto Dos Santos
Silva-herrera, María Del Rosario
Ceresini, Paulo Cezar
author_role author
author2 Chavarro-mesa, Edisson
Pereira, Danilo Augusto Dos Santos
Silva-herrera, María Del Rosario
Ceresini, Paulo Cezar
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
ETH Zurich Institute of Integrative Biology - Plant Pathology
Universidad de los Llanos
dc.contributor.author.fl_str_mv Ramos-molina, Lina Maria
Chavarro-mesa, Edisson
Pereira, Danilo Augusto Dos Santos
Silva-herrera, María Del Rosario
Ceresini, Paulo Cezar
dc.subject.por.fl_str_mv Urochloa spp.
Rhizoctonia oryzae-sativae
Sclerotium hydrophilum
Urochloa spp.
Rhizoctonia oryzaesativae
Sclerotium hydrophilum
topic Urochloa spp.
Rhizoctonia oryzae-sativae
Sclerotium hydrophilum
Urochloa spp.
Rhizoctonia oryzaesativae
Sclerotium hydrophilum
description ABSTRACT Foliar blight and death of signalgrass (Urochloa spp.) pastures are caused by the Rhizoctonia solani fungus. This study aimed at determining which pathogens from the Rhizoctonia species complex are associated with leaf and sheath blight in Urochloa and rice, in the Colombian Llanos. Sympatric areas of Urochloa pastures adjacent to rice cropping areas were sampled using a linear transect system. The pathogens were identified using morphological traits, molecular detection based on specific primers and sequencing of the ITS-5.8S rDNA region. R. solani AG-1 IA predominated as the pathogen associated with foliar blight in all samples from U. brizantha cv. 'Toledo' and hybrid Urochloa cv. 'Mulato'. Besides R. solani AG-1 IA (18 % of the samples), Rhizoctonia oryzae-sativae (71 %) and Sclerotium hydrophilum (11 %) were also detected. In the cross-pathogenicity test, the R. solani AG-1 IA fungus was the most aggressive to Urochloa, while R. oryzae-sativae produced very mild infection symptoms. This is the first report of R. oryzae-sativae and S. hydrophilum associated with the complex of rice sheath blight diseases in Colombia.
publishDate 2016
dc.date.none.fl_str_mv 2016-03-01
2018-11-12T17:27:53Z
2018-11-12T17:27:53Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1590/1983-40632016v4638696
Pesquisa Agropecuária Tropical. Escola de Agronomia/UFG, v. 46, n. 1, p. 65-71, 2016.
1983-4063
http://hdl.handle.net/11449/157998
10.1590/1983-40632016v4638696
S1983-40632016000100065
S1983-40632016000100065.pdf
2635092058300854
0000-0003-2381-2792
url http://dx.doi.org/10.1590/1983-40632016v4638696
http://hdl.handle.net/11449/157998
identifier_str_mv Pesquisa Agropecuária Tropical. Escola de Agronomia/UFG, v. 46, n. 1, p. 65-71, 2016.
1983-4063
10.1590/1983-40632016v4638696
S1983-40632016000100065
S1983-40632016000100065.pdf
2635092058300854
0000-0003-2381-2792
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Pesquisa Agropecuária Tropical
0,346
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 65-71
application/pdf
dc.publisher.none.fl_str_mv Escola de Agronomia/UFG
publisher.none.fl_str_mv Escola de Agronomia/UFG
dc.source.none.fl_str_mv SciELO
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
_version_ 1808128574783225856

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