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Registro Completo |
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Biblioteca(s): |
Embrapa Acre; Embrapa Agrobiologia; Embrapa Agropecuária Oeste; Embrapa Amapá; Embrapa Florestas; Embrapa Meio-Norte; Embrapa Unidades Centrais. |
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Data corrente: |
13/11/1997 |
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Data da última atualização: |
13/03/2023 |
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Autoria: |
GOMES, T. C. de A.; LOPES, V. M. B. |
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Afiliação: |
TAMARA CLAUDIA DE ARAUJO GOMES, CPAF-AC; VILMA MARIA BESSA LOPES, UNIVVERSIDADE FEDERAL DO ACRE. |
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Título: |
Velocidade de decomposição e liberação de nutrientes da biomassa de diferentes espécies de leguminosas em um sistema agroflorestal no Acre. |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
Rio Branco, AC: Embrapa CPAF-AC, 1997. |
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Páginas: |
2 p. |
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Série: |
(Embrapa CPAF-AC. Pesquisa em andamento, 111). |
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ISSN: |
0101-6075 |
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Idioma: |
Português |
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Conteúdo: |
A presente pesquisa tem como objetivo estudar a velocidade de decomposição da biomassa de diferentes espécies de leguminosas na superfície do solo de um sistema agroflorestal, bem como estudar o padrão de liberação de seus nutrientes. |
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Palavras-Chave: |
Acre; Acumulación de materia seca; Agrofloresta; Agroflorestal; Agroforestería; Amazonia Occidental; Amazônia Ocidental; Brasil; Degradación; Disponibilidad de nutrientes; Legumbres; Nova Califórnia (RO); Planta leguminosa; Projeto Reca; Rondônia; Sistema agroflorestal; Sistema agroflorestal (SAF); Western Amazon. |
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Thesagro: |
Biomassa; Decomposição; Disponibilidade de Nutriente; Espécie; Fertilidade do Solo; Floresta; Leguminosa; Nutriente. |
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Thesaurus Nal: |
agroforestry; biomass; Brazil; degradation; Dry matter accumulation; forests; legumes; Nutrient availability; nutrients. |
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Categoria do assunto: |
--
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CPAF-AC/1228/1/pesquisa111.pdf
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Marc: |
LEADER 01860nam a2200577 a 4500
001 1492516
005 2023-03-13
008 1997 bl uuuu u0uu1 u #d
022 $a0101-6075
100 1 $aGOMES, T. C. de A.
245 $aVelocidade de decomposição e liberação de nutrientes da biomassa de diferentes espécies de leguminosas em um sistema agroflorestal no Acre.
260 $aRio Branco, AC: Embrapa CPAF-AC$c1997
300 $a2 p.
490 $a(Embrapa CPAF-AC. Pesquisa em andamento, 111).
520 $aA presente pesquisa tem como objetivo estudar a velocidade de decomposição da biomassa de diferentes espécies de leguminosas na superfície do solo de um sistema agroflorestal, bem como estudar o padrão de liberação de seus nutrientes.
650 $aagroforestry
650 $abiomass
650 $aBrazil
650 $adegradation
650 $aDry matter accumulation
650 $aforests
650 $alegumes
650 $aNutrient availability
650 $anutrients
650 $aBiomassa
650 $aDecomposição
650 $aDisponibilidade de Nutriente
650 $aEspécie
650 $aFertilidade do Solo
650 $aFloresta
650 $aLeguminosa
650 $aNutriente
653 $aAcre
653 $aAcumulación de materia seca
653 $aAgrofloresta
653 $aAgroflorestal
653 $aAgroforestería
653 $aAmazonia Occidental
653 $aAmazônia Ocidental
653 $aBrasil
653 $aDegradación
653 $aDisponibilidad de nutrientes
653 $aLegumbres
653 $aNova Califórnia (RO)
653 $aPlanta leguminosa
653 $aProjeto Reca
653 $aRondônia
653 $aSistema agroflorestal
653 $aSistema agroflorestal (SAF)
653 $aWestern Amazon
700 1 $aLOPES, V. M. B.
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Registro original: |
Embrapa Acre (CPAF-AC) |
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Origem |
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Cutter |
Registro |
Volume |
Status |
URL |
Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Rondônia. |
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Data corrente: |
15/03/2016 |
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Data da última atualização: |
10/11/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
MESA, E. C.; CERESINI, P. C.; MOLINA, L. M. R.; PEREIRA, D. A. S.; SCHURT, D. A.; VIEIRA JUNIOR, J. R.; POLONI, N. M.; MCDONALD, B. A. |
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Afiliação: |
JOSE ROBERTO VIEIRA JUNIOR, CPAF-RO. |
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Título: |
The Urochloa foliar blight and collar rot pathogen Rhizoctonia solani AG-1 IA emerged in South America via a host shift from rice. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Phytopathology, v. 105, n. 11, p. 1476 - 1486, 2015. |
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Idioma: |
Inglês |
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Conteúdo: |
The fungus Rhizoctonia solani anastomosis group (AG)-1 IA emerged in the early 1990s as an important pathogen causing foliar blight and collar rot on pastures of the genus Urochloa (signalgrass) in South America. We tested the hypothesis that this pathogen emerged following a host shift or jump as a result of geographical overlapping of host species. The genetic structure of host and regional populations of R. solani AG-1 IA infecting signalgrass, rice, and soybean in Colombia and Brazil was analyzed using nine microsatellite loci in 350 isolates to measure population differentiation and infer the pathogen reproductive system. Phylogeographical analyses based on the microsatellite loci and on three DNA sequence loci were used to infer historical migration patterns and test hypotheses about the origin of the current pathogen populations. Cross pathogenicity assays were conducted to measure the degree of host specialization in populations sampled from different hosts. The combined analyses indicate that the pathogen populations currently infecting Urochloa in Colombia and Brazil most likely originated from a population that originally infected rice. R. solani AG-1 IA populations infecting Urochloa exhibit a mixed reproductive system including both sexual reproduction and long-distance dispersal of adapted clones, most likely on infected seed. The pathogen population on Urochloa has a genetic structure consistent with a high evolutionary potential and showed evidence for host specialization. MenosThe fungus Rhizoctonia solani anastomosis group (AG)-1 IA emerged in the early 1990s as an important pathogen causing foliar blight and collar rot on pastures of the genus Urochloa (signalgrass) in South America. We tested the hypothesis that this pathogen emerged following a host shift or jump as a result of geographical overlapping of host species. The genetic structure of host and regional populations of R. solani AG-1 IA infecting signalgrass, rice, and soybean in Colombia and Brazil was analyzed using nine microsatellite loci in 350 isolates to measure population differentiation and infer the pathogen reproductive system. Phylogeographical analyses based on the microsatellite loci and on three DNA sequence loci were used to infer historical migration patterns and test hypotheses about the origin of the current pathogen populations. Cross pathogenicity assays were conducted to measure the degree of host specialization in populations sampled from different hosts. The combined analyses indicate that the pathogen populations currently infecting Urochloa in Colombia and Brazil most likely originated from a population that originally infected rice. R. solani AG-1 IA populations infecting Urochloa exhibit a mixed reproductive system including both sexual reproduction and long-distance dispersal of adapted clones, most likely on infected seed. The pathogen population on Urochloa has a genetic structure consistent with a high evolutionary potential and showed evidence for host s... Mostrar Tudo |
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Palavras-Chave: |
Pathogen emergence; Pathogen origins. |
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Thesaurus NAL: |
gene flow. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/141200/1/Theurochloa.pdf
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Marc: |
LEADER 02262naa a2200241 a 4500
001 2041022
005 2021-11-10
008 2015 bl uuuu u00u1 u #d
100 1 $aMESA, E. C.
245 $aThe Urochloa foliar blight and collar rot pathogen Rhizoctonia solani AG-1 IA emerged in South America via a host shift from rice.$h[electronic resource]
260 $c2015
520 $aThe fungus Rhizoctonia solani anastomosis group (AG)-1 IA emerged in the early 1990s as an important pathogen causing foliar blight and collar rot on pastures of the genus Urochloa (signalgrass) in South America. We tested the hypothesis that this pathogen emerged following a host shift or jump as a result of geographical overlapping of host species. The genetic structure of host and regional populations of R. solani AG-1 IA infecting signalgrass, rice, and soybean in Colombia and Brazil was analyzed using nine microsatellite loci in 350 isolates to measure population differentiation and infer the pathogen reproductive system. Phylogeographical analyses based on the microsatellite loci and on three DNA sequence loci were used to infer historical migration patterns and test hypotheses about the origin of the current pathogen populations. Cross pathogenicity assays were conducted to measure the degree of host specialization in populations sampled from different hosts. The combined analyses indicate that the pathogen populations currently infecting Urochloa in Colombia and Brazil most likely originated from a population that originally infected rice. R. solani AG-1 IA populations infecting Urochloa exhibit a mixed reproductive system including both sexual reproduction and long-distance dispersal of adapted clones, most likely on infected seed. The pathogen population on Urochloa has a genetic structure consistent with a high evolutionary potential and showed evidence for host specialization.
650 $agene flow
653 $aPathogen emergence
653 $aPathogen origins
700 1 $aCERESINI, P. C.
700 1 $aMOLINA, L. M. R.
700 1 $aPEREIRA, D. A. S.
700 1 $aSCHURT, D. A.
700 1 $aVIEIRA JUNIOR, J. R.
700 1 $aPOLONI, N. M.
700 1 $aMCDONALD, B. A.
773 $tPhytopathology$gv. 105, n. 11, p. 1476 - 1486, 2015.
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Registro original: |
Embrapa Rondônia (CPAF-RO) |
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