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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia; Embrapa Milho e Sorgo. |
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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 (C2H2 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 02. 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 02 was not absolutely 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 nitrogensase activity which was dependent upon indigenous N2-fixing bacteria, associated with corn plants growing in a temperature dlimate. 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 + 0,001) of liming (5000 kg lime/ha) and (...) MenosCorn (Zea mays L.) plants were assayed for nitrogenase activity (C2H2 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 02. 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 02 was not absolutely 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 nitrogensase activity which was dependent upon indigenous N2-fixing bacteria, associated with corn plants growing in a temperature dlimate. 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 + 0,00... Mostrar Tudo |
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Palavras-Chave: |
Activity; Atividade; Fertilization; Lime; Maize; Nitrogense; Ramos; Root. |
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Thesagro: |
Adubação; 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 02483nam a2200361 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 (C2H2 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 02. 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 02 was not absolutely 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 nitrogensase activity which was dependent upon indigenous N2-fixing bacteria, associated with corn plants growing in a temperature dlimate. 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 + 0,001) of liming (5000 kg lime/ha) and (...)
650 $afertilizers
650 $anitrogen
650 $astems
650 $aAdubação
650 $aFertilizante
650 $aMilho
650 $aNitrogenase
650 $aNitrogênio
650 $aRaiz
650 $aZea Mays
653 $aActivity
653 $aAtividade
653 $aFertilization
653 $aLime
653 $aMaize
653 $aNitrogense
653 $aRamos
653 $aRoot
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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| Registros recuperados : 136 | |
| 5. |  | LEAL, M. A. A.; DE-POLLI, H. Aplicação de modelos ao estudo da matéria orgânica. 2. ed. rev. atual. ampl. In: SANTOS, G. de A.; SILVA, L. S. da; CANELLAS, L. P.; CAMARGO, F. A. O. (Ed.). Fundamentos da matéria orgânica do solo: ecossistemas tropicais & subtropicais. Porto Alegre: Metrópole, 2008. p. 171-182.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Agrobiologia. |
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| 13. | | DE-POLLI, H.; PIMENTEL, M. S. Indicadores de qualidade do solo. In: AQUINO, A. M. de; ASSIS, R. L. de (Ed.). Processos biológicos no sistema solo-planta: ferramentas para uma agricultura sustentável. Brasília, DF: Embrapa Informação Tecnológica; Seropédica: Embrapa Agrobiologia, 2005. cap. 1. p. 17-28.| Biblioteca(s): Embrapa Agrobiologia. |
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| 15. | | DE POLLI, H.; FRANCO, A. A. Inoculação de leguminosas. In: , eds. In: Manual de adubacao para o Estado do Rio de Janeiro. Itaguai, Universidae Rural. p. 64-68. (Colecao Universidade Rural. Ciencias Agrarias, 2).. , 1988.| Biblioteca(s): Embrapa Agrobiologia. |
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| 20. | | COSTANTINI, A. O.; DE-POLLI, H. Taxa de estratificação do carbono orgânico como indicador de qualidade de um solo argiudoll típico. In: REUNIÃO BRASILEIRA DE FERTILIDADE DO SOLO E NUTRIÇÃO DE PLANTAS, 28., REUNIÃO BRASILEIRA SOBRE MICORRIZAS, 12., SIMPÓSIO BRASILEIRO DE MICROBIOLOGIA DO SOLO, 10., REUNIÃO BRASILEIRA DE BIOLOGIA DO SOLO, 7., 2008, Londrina. FertBio 2008: desafios para o uso do solo com eficiência e qualidade ambiental: anais. Londrina: Embrapa Soja: SBCS: IAPAR, UEL, 2008. 4 p. 1 CD-ROM. Parceria: INTA.
Organizado por: Adilson de Oliveira Júnior, Regina Maria Villas Bôas de Campos Leite, César de Castro, Fábio Álvares de Oliveira; Odilon Ferreira Saraiva.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Agrobiologia. |
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| Registros recuperados : 136 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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