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 | Acesso ao texto completo restrito à biblioteca da Embrapa Arroz e Feijão. Para informações adicionais entre em contato com cnpaf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
05/08/2013 |
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Data da última atualização: |
31/10/2013 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SOBRAL, L. F.; SMYTH, J. T.; FAGERIA, N. K.; STONE, L. F. |
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Afiliação: |
LAFAYETTE FRANCO SOBRAL, CPATC; J. T. SMYTH, NORTH CAROLINA STATE UNIVERSITY; NAND KUMAR FAGERIA, CNPAF; LUIS FERNANDO STONE, CNPAF. |
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Título: |
Comparison of copper, manganese, and zinc extraction with Mehlich 1, Mehlich 3, and DTPA solutions for soils of the Brazilian Coastal Tablelands. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Communications in Soil Science and Plant Analysis, New York, v. 44, n. 17, p. 2507-2513, 2013. |
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ISSN: |
0010-3624 |
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DOI: |
10.1080/00103624.2013.812731 |
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Idioma: |
Inglês |
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Conteúdo: |
Deficiency of micronutrients is increasing in crop plants in recent years in Oxisols and Ultisols in the tropics. The predominant soils in the coastal tablelands of Brazil are Ultisols and Oxisols, with low cation exchange capacity and kaolinitic clay mineralogy. Soil copper (Cu), manganese (Mn), and zinc (Zn) extracted by the Mehlich 1 solution, currently used in the regional soil-testing laboratories, were compared with those extracted by the Mehlich 3 and diethylenetriaminepentaacetic acid (DTPA) solutions in a greenhouse experiment with 10 soil samples (0-20 cm deep) collected from representative Ultisols and Oxisols from various locations in the region. Corn was grown as a test crop, and its dry matter and micronutrient uptake was measured at 30 days of growth. Soil Cu, Mn, and Zn extracted with the three solutions were significantly correlated (0.65-0.95 range for r values), with the Mehlich 3 solution extracting greater quantities than the Mehlich 1 and DTPA solutions. Zinc and Cu taken up by corn plants were significantly related to their soil-extractable levels measured at harvest with all three of the solutions, except for Zn DTPA. However, similar relations between plant uptake and soil extractable Mn were poor, except for DTPA extracting solution. |
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Thesagro: |
Microelemento; Solo. |
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Thesaurus Nal: |
Plant micronutrients; Soil analysis. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02048naa a2200229 a 4500
001 1963380
005 2013-10-31
008 2013 bl uuuu u00u1 u #d
022 $a0010-3624
024 7 $a10.1080/00103624.2013.812731$2DOI
100 1 $aSOBRAL, L. F.
245 $aComparison of copper, manganese, and zinc extraction with Mehlich 1, Mehlich 3, and DTPA solutions for soils of the Brazilian Coastal Tablelands.$h[electronic resource]
260 $c2013
520 $aDeficiency of micronutrients is increasing in crop plants in recent years in Oxisols and Ultisols in the tropics. The predominant soils in the coastal tablelands of Brazil are Ultisols and Oxisols, with low cation exchange capacity and kaolinitic clay mineralogy. Soil copper (Cu), manganese (Mn), and zinc (Zn) extracted by the Mehlich 1 solution, currently used in the regional soil-testing laboratories, were compared with those extracted by the Mehlich 3 and diethylenetriaminepentaacetic acid (DTPA) solutions in a greenhouse experiment with 10 soil samples (0-20 cm deep) collected from representative Ultisols and Oxisols from various locations in the region. Corn was grown as a test crop, and its dry matter and micronutrient uptake was measured at 30 days of growth. Soil Cu, Mn, and Zn extracted with the three solutions were significantly correlated (0.65-0.95 range for r values), with the Mehlich 3 solution extracting greater quantities than the Mehlich 1 and DTPA solutions. Zinc and Cu taken up by corn plants were significantly related to their soil-extractable levels measured at harvest with all three of the solutions, except for Zn DTPA. However, similar relations between plant uptake and soil extractable Mn were poor, except for DTPA extracting solution.
650 $aPlant micronutrients
650 $aSoil analysis
650 $aMicroelemento
650 $aSolo
700 1 $aSMYTH, J. T.
700 1 $aFAGERIA, N. K.
700 1 $aSTONE, L. F.
773 $tCommunications in Soil Science and Plant Analysis, New York$gv. 44, n. 17, p. 2507-2513, 2013.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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Registro Completo
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Biblioteca(s): |
Embrapa Arroz e Feijão; Embrapa Solos; Embrapa Unidades Centrais. |
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Data corrente: |
14/05/1999 |
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Data da última atualização: |
14/10/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
LEE, K.; DOBEREINER, J. |
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Afiliação: |
KEUK-KI LEE, CNPAF; JOHANNA DOBEREINER, SNLCS. |
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Título: |
Effect of excessive temperatures on rhizobia growth nodulation and nitrogen fixing activity in symbiosis with siratro. |
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Ano de publicação: |
1982 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, v. 17, n. 2, p. 181-84, fev. 1982. |
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Idioma: |
Inglês |
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Conteúdo: |
ABSTRACT - The heat tolerance of 17 strains of Rhizobium sp. was studied on agar plates, in liquid culture medium and in symbiotic associations with Macroptilium atropurpureum. To test this the plants were exposed during six hours per day and during incubation with C2H2, to temperatures ranging from 28 to 40 Graus C. There were significant differences among strains in their tolerance to high temperatures, and five of them were to able grow well at 40 Graus C. Rhizobium growth on agar plates or in liquid medium however did not correlate with symbiotic performance. One strain which showed fastest growth in liquid medium at 40 Graus C. showed almost linear decreasing nitrogenase activity with increasing temperatures from 28 to 40 Graus C. Another strain which also showed good growth up to 40 Graus C. in culture medium showed unaffected nitrogenase up to this temperature. The temperature sensitive strains showed maximal nitrogenase activity at 32 Graus C. but all tested strains were able to nodulate and to fix some N2 (reduce C2H2) at 40 Graus C.
RESUMO- Foi estudada a tolerância, a temperaturas elevadas, de 17 estirpes deRh/zobium sp., em meio de cultura e na associação simbiótica com Macroptifium atropurpureum. Nestes experimentos, as plantas foram expostas a diferentes temperaturas (28 a 40°C), durante seis horas por dia e durante a incubação com C21-11. Observaram-se diferenças significativas entre estirpes, e cinco delas foram capazes de crescer à temperatura de 40°C. O crescimento do rizóbio em meio de cultura sólido (agar) ou liquido, entretanto, nao correspondeu ao comportamento das diferentes estirpes em associação com a planta. Uma estirpe que mostrou crescimento mais rápido em meio liquido a 40°C apresentou atividade de nitrogenase decrescente com o aumento da temperatura de 28 para 40°C. Uma outra estirpe, que também cresceu até 40°C em meio de cultura, não teve sua nitrogenase afetada por temperaturas crescentes de 28 a 40°C. As estirpes mais sensíveis a temperaturas elevadas mostraram atividades de nitrogenase máxima em 32°C.Todas as estirpes deRhizobium sp. testadas foram capazes de nodular e de fixar algum N 2 (reduzir C21-1 3 ) a 40°C. MenosABSTRACT - The heat tolerance of 17 strains of Rhizobium sp. was studied on agar plates, in liquid culture medium and in symbiotic associations with Macroptilium atropurpureum. To test this the plants were exposed during six hours per day and during incubation with C2H2, to temperatures ranging from 28 to 40 Graus C. There were significant differences among strains in their tolerance to high temperatures, and five of them were to able grow well at 40 Graus C. Rhizobium growth on agar plates or in liquid medium however did not correlate with symbiotic performance. One strain which showed fastest growth in liquid medium at 40 Graus C. showed almost linear decreasing nitrogenase activity with increasing temperatures from 28 to 40 Graus C. Another strain which also showed good growth up to 40 Graus C. in culture medium showed unaffected nitrogenase up to this temperature. The temperature sensitive strains showed maximal nitrogenase activity at 32 Graus C. but all tested strains were able to nodulate and to fix some N2 (reduce C2H2) at 40 Graus C.
RESUMO- Foi estudada a tolerância, a temperaturas elevadas, de 17 estirpes deRh/zobium sp., em meio de cultura e na associação simbiótica com Macroptifium atropurpureum. Nestes experimentos, as plantas foram expostas a diferentes temperaturas (28 a 40°C), durante seis horas por dia e durante a incubação com C21-11. Observaram-se diferenças significativas entre estirpes, e cinco delas foram capazes de crescer à temperatura de 40°C. O cr... Mostrar Tudo |
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Palavras-Chave: |
Associacao simbiotica; Heat tolerant rhizobia; Nodulacao em Siratro; Nodulation of Siratro; Symbiotic association. |
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Thesagro: |
Fixação de Nitrogênio; Macroptilium Atropurpureum; Nitrogênio; Siratro. |
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Thesaurus NAL: |
Heat tolerance; nitrogen fixation. |
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Categoria do assunto: |
--
P Recursos Naturais, Ciências Ambientais e da Terra
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/219921/1/Effect-excessive-temperatures-1982.pdf
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Marc: |
LEADER 03040naa a2200265 a 4500
001 1214361
005 2021-10-14
008 1982 bl uuuu u00u1 u #d
100 1 $aLEE, K.
245 $aEffect of excessive temperatures on rhizobia growth nodulation and nitrogen fixing activity in symbiosis with siratro.
260 $c1982
520 $aABSTRACT - The heat tolerance of 17 strains of Rhizobium sp. was studied on agar plates, in liquid culture medium and in symbiotic associations with Macroptilium atropurpureum. To test this the plants were exposed during six hours per day and during incubation with C2H2, to temperatures ranging from 28 to 40 Graus C. There were significant differences among strains in their tolerance to high temperatures, and five of them were to able grow well at 40 Graus C. Rhizobium growth on agar plates or in liquid medium however did not correlate with symbiotic performance. One strain which showed fastest growth in liquid medium at 40 Graus C. showed almost linear decreasing nitrogenase activity with increasing temperatures from 28 to 40 Graus C. Another strain which also showed good growth up to 40 Graus C. in culture medium showed unaffected nitrogenase up to this temperature. The temperature sensitive strains showed maximal nitrogenase activity at 32 Graus C. but all tested strains were able to nodulate and to fix some N2 (reduce C2H2) at 40 Graus C. RESUMO- Foi estudada a tolerância, a temperaturas elevadas, de 17 estirpes deRh/zobium sp., em meio de cultura e na associação simbiótica com Macroptifium atropurpureum. Nestes experimentos, as plantas foram expostas a diferentes temperaturas (28 a 40°C), durante seis horas por dia e durante a incubação com C21-11. Observaram-se diferenças significativas entre estirpes, e cinco delas foram capazes de crescer à temperatura de 40°C. O crescimento do rizóbio em meio de cultura sólido (agar) ou liquido, entretanto, nao correspondeu ao comportamento das diferentes estirpes em associação com a planta. Uma estirpe que mostrou crescimento mais rápido em meio liquido a 40°C apresentou atividade de nitrogenase decrescente com o aumento da temperatura de 28 para 40°C. Uma outra estirpe, que também cresceu até 40°C em meio de cultura, não teve sua nitrogenase afetada por temperaturas crescentes de 28 a 40°C. As estirpes mais sensíveis a temperaturas elevadas mostraram atividades de nitrogenase máxima em 32°C.Todas as estirpes deRhizobium sp. testadas foram capazes de nodular e de fixar algum N 2 (reduzir C21-1 3 ) a 40°C.
650 $aHeat tolerance
650 $anitrogen fixation
650 $aFixação de Nitrogênio
650 $aMacroptilium Atropurpureum
650 $aNitrogênio
650 $aSiratro
653 $aAssociacao simbiotica
653 $aHeat tolerant rhizobia
653 $aNodulacao em Siratro
653 $aNodulation of Siratro
653 $aSymbiotic association
700 1 $aDOBEREINER, J.
773 $tPesquisa Agropecuária Brasileira$gv. 17, n. 2, p. 181-84, fev. 1982.
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