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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
14/12/1995 |
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Data da última atualização: |
14/12/1995 |
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Autoria: |
DE-POLLI, H. |
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Título: |
Nitrogenase activity in roots and stems of corn (Zea mays L.) cultivars and its response to nitrogen fertilizer and lime amendments. |
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Ano de publicação: |
1983 |
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Fonte/Imprenta: |
New Brunswick: State University of New Jersey, Out., 1983. |
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Páginas: |
132p. |
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Série: |
Tese de Doutorado. |
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Idioma: |
Inglês |
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Notas: |
Orientada por: Carlos A. Neira |
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Conteúdo: |
Corn (Zea mays L.) plants were assayed for nitrogenase activity (C2H" reduction) during early ear development. Hybrid corn and inbred lines were grown separately at two experimental fields in New Jersey. Acetylene-dependent ethylene production was observed a few hours after harvest by intact plants, root-soil cores, lower stem segments, and excised roots, all assayed under air and not preincubated. Incubation of excised roots at 1% (v/v) of O2 resulted in lower rates of C2H2 reduction as compared to 20% (v/v) of O2. The time course of C2H2 reduction by excised roots, assayed in air, was similar for all genotypes studied (two hybrids, eight inbreds, and a cross of corn x teosinte) and indicated that a long preincubation at reduced O2 was not absoluted requiredfor early detection of nitrogenase activity. Isolation of N2-fixing bacteria from within the roots and stems, together with the diurnal fluctuation of nitrogenase activity in response to day/night cycles, were indicative of a close association of N2 fixation with plant function. The data provided evidence for the occurrence of nitrogenase activity which was dependent upon indigenous N2-fixing bacteria, associated with corn plants growing in a temperate climate. A field experiment was conducted to evaluate the effects of cultivar, liming and N level on the nitrogenase activity (C2H2 reduction) associated with corn roots and stems and dependent upon indigenous N2-fixing bacteria. A significant positive effect (P = 0,01) of liming (5000 kg lime/ha) and a ... MenosCorn (Zea mays L.) plants were assayed for nitrogenase activity (C2H" reduction) during early ear development. Hybrid corn and inbred lines were grown separately at two experimental fields in New Jersey. Acetylene-dependent ethylene production was observed a few hours after harvest by intact plants, root-soil cores, lower stem segments, and excised roots, all assayed under air and not preincubated. Incubation of excised roots at 1% (v/v) of O2 resulted in lower rates of C2H2 reduction as compared to 20% (v/v) of O2. The time course of C2H2 reduction by excised roots, assayed in air, was similar for all genotypes studied (two hybrids, eight inbreds, and a cross of corn x teosinte) and indicated that a long preincubation at reduced O2 was not absoluted requiredfor early detection of nitrogenase activity. Isolation of N2-fixing bacteria from within the roots and stems, together with the diurnal fluctuation of nitrogenase activity in response to day/night cycles, were indicative of a close association of N2 fixation with plant function. The data provided evidence for the occurrence of nitrogenase activity which was dependent upon indigenous N2-fixing bacteria, associated with corn plants growing in a temperate climate. A field experiment was conducted to evaluate the effects of cultivar, liming and N level on the nitrogenase activity (C2H2 reduction) associated with corn roots and stems and dependent upon indigenous N2-fixing bacteria. A significant positive effect (P = 0,01) of... Mostrar Tudo |
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Palavras-Chave: |
Maize; Ramos; Root. |
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Thesagro: |
Fertilizante; Milho; Nitrogenase; Nitrogênio; Raiz; Zea Mays. |
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Thesaurus Nal: |
fertilizers; nitrogen; stems. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02322nam a2200289 a 4500
001 1621510
005 1995-12-14
008 1983 bl uuuu m 00u1 u #d
100 1 $aDE-POLLI, H.
245 $aNitrogenase activity in roots and stems of corn (Zea mays L.) cultivars and its response to nitrogen fertilizer and lime amendments.
260 $aNew Brunswick: State University of New Jersey, Out.$c1983
300 $a132p.
490 $aTese de Doutorado.
500 $aOrientada por: Carlos A. Neira
520 $aCorn (Zea mays L.) plants were assayed for nitrogenase activity (C2H" reduction) during early ear development. Hybrid corn and inbred lines were grown separately at two experimental fields in New Jersey. Acetylene-dependent ethylene production was observed a few hours after harvest by intact plants, root-soil cores, lower stem segments, and excised roots, all assayed under air and not preincubated. Incubation of excised roots at 1% (v/v) of O2 resulted in lower rates of C2H2 reduction as compared to 20% (v/v) of O2. The time course of C2H2 reduction by excised roots, assayed in air, was similar for all genotypes studied (two hybrids, eight inbreds, and a cross of corn x teosinte) and indicated that a long preincubation at reduced O2 was not absoluted requiredfor early detection of nitrogenase activity. Isolation of N2-fixing bacteria from within the roots and stems, together with the diurnal fluctuation of nitrogenase activity in response to day/night cycles, were indicative of a close association of N2 fixation with plant function. The data provided evidence for the occurrence of nitrogenase activity which was dependent upon indigenous N2-fixing bacteria, associated with corn plants growing in a temperate climate. A field experiment was conducted to evaluate the effects of cultivar, liming and N level on the nitrogenase activity (C2H2 reduction) associated with corn roots and stems and dependent upon indigenous N2-fixing bacteria. A significant positive effect (P = 0,01) of liming (5000 kg lime/ha) and a ...
650 $afertilizers
650 $anitrogen
650 $astems
650 $aFertilizante
650 $aMilho
650 $aNitrogenase
650 $aNitrogênio
650 $aRaiz
650 $aZea Mays
653 $aMaize
653 $aRamos
653 $aRoot
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
30/01/2009 |
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Data da última atualização: |
30/01/2009 |
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Tipo da produção científica: |
Artigo em Anais de Congresso / Nota Técnica |
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Autoria: |
PEREIRA, L. G. R.; MAURÍCIO, R. M.; MENEZES, D. R.; ARAÚJO, G. G. L. de; SOUSA, L. F.; CARVALHO, W. T. V.; GUIMARÃES JÚNIOR, R. |
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Afiliação: |
Luiz Gustavo Ribeiro Pereira, CPATSA; Rogério Martins Maurício, Fundação Ezequiel Dias; Daniel Ribeiro Menezes, UFBA; Gherman Garcia Leal de Araújo, CPATSA; Luciano Fernandes Sousa, UFMG; Wellington Tadeu Vilela Carvalho, UFMG; Roberto Guimarães Júnior, CPAC. |
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Título: |
Influência da glicerina bruta na cinética de fermentação ruminal in vitro. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 45., 2008, Lavras. Anais... Lavras: UFLA: SBZ, 2008. 1 CD-ROM. |
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Idioma: |
Português |
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Palavras-Chave: |
Gliconeogênese. |
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Thesaurus NAL: |
biodiesel. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00670naa a2200205 a 4500
001 1571588
005 2009-01-30
008 2008 bl uuuu u00u1 u #d
100 1 $aPEREIRA, L. G. R.
245 $aInfluência da glicerina bruta na cinética de fermentação ruminal in vitro.
260 $c2008
650 $abiodiesel
653 $aGliconeogênese
700 1 $aMAURÍCIO, R. M.
700 1 $aMENEZES, D. R.
700 1 $aARAÚJO, G. G. L. de
700 1 $aSOUSA, L. F.
700 1 $aCARVALHO, W. T. V.
700 1 $aGUIMARÃES JÚNIOR, R.
773 $tIn: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 45., 2008, Lavras. Anais... Lavras: UFLA: SBZ, 2008. 1 CD-ROM.
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