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1. | | FARIA, D. A. de; FERRARI, M.; PALLAORO, D. S.; RAMOS, J. B.; CARVALHO, C. G. P. de; CAMPOS, D. T. da S.; BORBA FILHO, A. B. Comportamento de genótipos de girassol em Mato Grosso, na safra de 2011. In: REUNIÃO NACIONAL DE PESQUISA DE GIRASSOL, 20.; SIMPÓSIO NACIONAL SOBRE A CULTURA DO GIRASSOL, 8., 2013, Cuiabá. Anais... Brasília, DF: Embrapa, 2013. p. 128-130. Biblioteca(s): Embrapa Soja. |
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Registros recuperados : 1 | |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Agrobiologia. Para informações adicionais entre em contato com cnpab.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Agrobiologia. |
Data corrente: |
14/12/1995 |
Data da última atualização: |
14/12/1995 |
Autoria: |
DE-POLLI, H. |
Título: |
Nitrogenase activity in roots and stems of corn (Zea mays L.) cultivars and its response to nitrogen fertilizer and lime amendments. |
Ano de publicação: |
1983 |
Fonte/Imprenta: |
New Brunswick: State University of New Jersey, Out., 1983. |
Páginas: |
132p. |
Série: |
Tese de Doutorado. |
Idioma: |
Inglês |
Notas: |
Orientada por: Carlos A. Neira |
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 |
Palavras-Chave: |
Maize; Ramos; Root. |
Thesagro: |
Fertilizante; Milho; Nitrogenase; Nitrogênio; Raiz; Zea Mays. |
Thesaurus NAL: |
fertilizers; nitrogen; stems. |
Categoria do assunto: |
-- |
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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Embrapa Agrobiologia (CNPAB) |
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