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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
04/10/2006 |
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Data da última atualização: |
12/04/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ARAÚJO, A. S. F.; MONTEIRO, R. T. R.; ABAKERLI, R. B. |
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Afiliação: |
A. S. F. ARAÚJO, aCentro de Energia Nuclear na Agricultura; R. T. R. MONTEIRO, Embrapa Meio Ambiente; R. B. ABAKERLI, Embrapa Meio Ambiente. |
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Título: |
Effect of glyphosate on the microbial activity of two Brazilian soils. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
Chemosphere, Oxford, v. 52, p. 799-804, 2003. |
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Idioma: |
Inglês |
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Conteúdo: |
Glyphosate [N-(phosphonomethyl)-glycine] is a broad-spectrum, non-selective, post-emergence herbicide that is widely used in agricultural. We studied, in vitro, changes in the microbial activity of typical Hapludult and Hapludox Brazilian soils, with and without applied glyphosate. Glyphosate was applied at a rate of 2.16 mg glyphosate kg[-1] of soil and microbial activity was measured by soil respiration (evolution of CO[2]) and fluorescein diacetate (FDA) hydrolysis over a period of 32 days. We found an increase of 10-15% in the CO[2] evolved and a 9-19% increase in FDA hydrolyses in the presence of glyphosate compared with the same type of soil which had never received glyphosate. Soil which had been exposed to glyphosate for several years had the strongest response in microbial activity. Most probable number (MPN) counts showed that after 32 days incubation the number of actinomycetes and fungi had increased while the number of bacteria showed a slight reduction. After the incubation period, high pressure liquid chromatography (HPLC) detected the glyphosate metabolite aminomethyl phosphonic acid (AMPA), indicating glyphosate degradation by soil microorganisms. |
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Thesagro: |
Biodegradação; Herbicida. |
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Categoria do assunto: |
H Saúde e Patologia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/163844/1/Araujo-Effect-6438.pdf
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Marc: |
LEADER 01673naa a2200169 a 4500
001 1015088
005 2018-04-12
008 2003 bl uuuu u00u1 u #d
100 1 $aARAÚJO, A. S. F.
245 $aEffect of glyphosate on the microbial activity of two Brazilian soils.$h[electronic resource]
260 $c2003
520 $aGlyphosate [N-(phosphonomethyl)-glycine] is a broad-spectrum, non-selective, post-emergence herbicide that is widely used in agricultural. We studied, in vitro, changes in the microbial activity of typical Hapludult and Hapludox Brazilian soils, with and without applied glyphosate. Glyphosate was applied at a rate of 2.16 mg glyphosate kg[-1] of soil and microbial activity was measured by soil respiration (evolution of CO[2]) and fluorescein diacetate (FDA) hydrolysis over a period of 32 days. We found an increase of 10-15% in the CO[2] evolved and a 9-19% increase in FDA hydrolyses in the presence of glyphosate compared with the same type of soil which had never received glyphosate. Soil which had been exposed to glyphosate for several years had the strongest response in microbial activity. Most probable number (MPN) counts showed that after 32 days incubation the number of actinomycetes and fungi had increased while the number of bacteria showed a slight reduction. After the incubation period, high pressure liquid chromatography (HPLC) detected the glyphosate metabolite aminomethyl phosphonic acid (AMPA), indicating glyphosate degradation by soil microorganisms.
650 $aBiodegradação
650 $aHerbicida
700 1 $aMONTEIRO, R. T. R.
700 1 $aABAKERLI, R. B.
773 $tChemosphere, Oxford$gv. 52, p. 799-804, 2003.
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Registro original: |
Embrapa Meio Ambiente (CNPMA) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Soja. Para informações adicionais entre em contato com valeria.cardoso@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
06/10/1992 |
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Data da última atualização: |
28/10/2004 |
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Autoria: |
HENNING, A. A.; FRANCA NETO, J. B. |
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Afiliação: |
EMBRAPA-CNPSo, Londrina, PR. |
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Título: |
Physiological race and sources of resistance to downy mildew (Plasmopara halstedii (Farl.) Berl. & de Toni) in Brazil. |
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Ano de publicação: |
1985 |
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Fonte/Imprenta: |
In: CONFERENCIA INTERNACIONAL DE GIRASOL, 11., 1985, Mar del Plata, Actas. Mar del Plata: ASAGIR/ISA, 1985. |
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Volume: |
t.2 |
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Páginas: |
p.407-409. |
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Idioma: |
Inglês |
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Conteúdo: |
The occurrence of the sunflower downy mildew in Brazil was observed in 1982. This study was carried out to determine the physiological race and to find out possible sources of resistance to P. halstedii. Identification of the race was made using the breeding lines AD 66, (resistant to European race I), RHA 271 and RHA 274, resistant to European race I and American race II, and cultivar Issanka, susceptible to both races Seeds were artificially inoculated with oospore suspension obtained from field infected leaves, and planted in the greenhouse in trays containing nonsterilized soil. The disease was observed only on plants of Issanka and AD 66, indicating that the race of P. halstedii occurring in Brazil is the American race II. Among the several lines, varieties and hybrids tested, Issanka, Cordobes, Contissol 112, Progress, PGIB, PIIDR, KLM, 3GR, 2GB x Nains and 6B x Ilnissei were susceptible. Only the hybrid DK 180 wasresistant to the disease. |
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Palavras-Chave: |
Brasil; Disease; Fitopatologia; Fungus; Phytopathology; Resistance; Sunflower. |
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Thesagro: |
Doença; Fungo; Girassol; Plasmopara Halstedii; Resistência. |
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Thesaurus NAL: |
Brazil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01840naa a2200313 a 4500
001 1453032
005 2004-10-28
008 1985 bl uuuu u00u1 u #d
100 1 $aHENNING, A. A.
245 $aPhysiological race and sources of resistance to downy mildew (Plasmopara halstedii (Farl.) Berl. & de Toni) in Brazil.
260 $c1985
300 $ap.407-409. t.2
490 $vt.2
520 $aThe occurrence of the sunflower downy mildew in Brazil was observed in 1982. This study was carried out to determine the physiological race and to find out possible sources of resistance to P. halstedii. Identification of the race was made using the breeding lines AD 66, (resistant to European race I), RHA 271 and RHA 274, resistant to European race I and American race II, and cultivar Issanka, susceptible to both races Seeds were artificially inoculated with oospore suspension obtained from field infected leaves, and planted in the greenhouse in trays containing nonsterilized soil. The disease was observed only on plants of Issanka and AD 66, indicating that the race of P. halstedii occurring in Brazil is the American race II. Among the several lines, varieties and hybrids tested, Issanka, Cordobes, Contissol 112, Progress, PGIB, PIIDR, KLM, 3GR, 2GB x Nains and 6B x Ilnissei were susceptible. Only the hybrid DK 180 wasresistant to the disease.
650 $aBrazil
650 $aDoença
650 $aFungo
650 $aGirassol
650 $aPlasmopara Halstedii
650 $aResistência
653 $aBrasil
653 $aDisease
653 $aFitopatologia
653 $aFungus
653 $aPhytopathology
653 $aResistance
653 $aSunflower
700 1 $aFRANCA NETO, J. B.
773 $tIn: CONFERENCIA INTERNACIONAL DE GIRASOL, 11., 1985, Mar del Plata, Actas. Mar del Plata: ASAGIR/ISA, 1985.
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Embrapa Soja (CNPSO) |
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