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Registro Completo |
Biblioteca(s): |
Embrapa Milho e Sorgo; Embrapa Trigo. |
Data corrente: |
06/05/1997 |
Data da última atualização: |
25/11/2019 |
Autoria: |
SOUZA, I. R. P. de. |
Afiliação: |
EMBRAPA/CNPMS. |
Título: |
Gibberellic acid and dwarfism effects on peroxidase activity and secretion of anionic isoenzymes into the cell wall of expanding maize (Zea mays L.) leaf blades. |
Ano de publicação: |
1997 |
Fonte/Imprenta: |
Logan: Utah State University, 1997. |
Páginas: |
89p. |
Idioma: |
Inglês |
Notas: |
Doctor Sc. Thesis. |
Conteúdo: |
Many studies have related changes in plant growth with peroxidase activity, but few of these have correlated changes in growth with changes in a specific isoenzyme, although many isoenzymes have been shown to be organ-specific with developmental expression. We used the developmental gradient presented by the maize (Zea mays L.) leaf blade to study the spatial distribution of growth and peroxidase activity. All experimentation used the second expanding true leaf blade in which the ligule ahd not been displaced from the leaf base by growth of the leaf sheath. Quantitative and qualitative analyses of total soluble (soluble plus ionically bound to the cell wall) and apoplastic peroxidase activity were conducted along the leaf blade of the B73 maize inbred line. For apoplastic fluid extraction, a vacuum-infiltration procedure was used followed by low-speed centrifugation. No cytoplasmic contamination occurred because no glucuose-6-phosphate dehydrogenase activity could be detected in apoplastic extracts. Total soluble peroxidase activity presented was high near the leaf base in the region of cell division, and relatively low through the rest of the elongation zone. In contrast, a transient peak in apoplastic peroxidase activity occurred in the middle of the elongation zone, ans poceded a arpid decrease in cell elongation rate. Zymograms of total and apoplastic extraction showed that two anionic peroxidase isoenzymes, pI 5.6 and 5.7 began to increase in activity where epidermal cell elongation stopped. (...) MenosMany studies have related changes in plant growth with peroxidase activity, but few of these have correlated changes in growth with changes in a specific isoenzyme, although many isoenzymes have been shown to be organ-specific with developmental expression. We used the developmental gradient presented by the maize (Zea mays L.) leaf blade to study the spatial distribution of growth and peroxidase activity. All experimentation used the second expanding true leaf blade in which the ligule ahd not been displaced from the leaf base by growth of the leaf sheath. Quantitative and qualitative analyses of total soluble (soluble plus ionically bound to the cell wall) and apoplastic peroxidase activity were conducted along the leaf blade of the B73 maize inbred line. For apoplastic fluid extraction, a vacuum-infiltration procedure was used followed by low-speed centrifugation. No cytoplasmic contamination occurred because no glucuose-6-phosphate dehydrogenase activity could be detected in apoplastic extracts. Total soluble peroxidase activity presented was high near the leaf base in the region of cell division, and relatively low through the rest of the elongation zone. In contrast, a transient peak in apoplastic peroxidase activity occurred in the middle of the elongation zone, ans poceded a arpid decrease in cell elongation rate. Zymograms of total and apoplastic extraction showed that two anionic peroxidase isoenzymes, pI 5.6 and 5.7 began to increase in activity where epidermal ce... Mostrar Tudo |
Palavras-Chave: |
Aluminium; Growth; Leaf; Maize; Tolerance; Tolerancia. |
Thesagro: |
Ácido Giberélico; Alumínio; Biologia Molecular; Crescimento; Eletroforese; Fisiologia; Folha; Isoenzima; Milho; Regulador de Crescimento; Zea Mays. |
Thesaurus Nal: |
molecular biology; plant physiology. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02514nam a2200361 a 4500 001 1474415 005 2019-11-25 008 1997 bl uuuu m 00u1 u #d 100 1 $aSOUZA, I. R. P. de 245 $aGibberellic acid and dwarfism effects on peroxidase activity and secretion of anionic isoenzymes into the cell wall of expanding maize (Zea mays L.) leaf blades. 260 $aLogan: Utah State University$c1997 300 $a89p. 500 $aDoctor Sc. Thesis. 520 $aMany studies have related changes in plant growth with peroxidase activity, but few of these have correlated changes in growth with changes in a specific isoenzyme, although many isoenzymes have been shown to be organ-specific with developmental expression. We used the developmental gradient presented by the maize (Zea mays L.) leaf blade to study the spatial distribution of growth and peroxidase activity. All experimentation used the second expanding true leaf blade in which the ligule ahd not been displaced from the leaf base by growth of the leaf sheath. Quantitative and qualitative analyses of total soluble (soluble plus ionically bound to the cell wall) and apoplastic peroxidase activity were conducted along the leaf blade of the B73 maize inbred line. For apoplastic fluid extraction, a vacuum-infiltration procedure was used followed by low-speed centrifugation. No cytoplasmic contamination occurred because no glucuose-6-phosphate dehydrogenase activity could be detected in apoplastic extracts. Total soluble peroxidase activity presented was high near the leaf base in the region of cell division, and relatively low through the rest of the elongation zone. In contrast, a transient peak in apoplastic peroxidase activity occurred in the middle of the elongation zone, ans poceded a arpid decrease in cell elongation rate. Zymograms of total and apoplastic extraction showed that two anionic peroxidase isoenzymes, pI 5.6 and 5.7 began to increase in activity where epidermal cell elongation stopped. (...) 650 $amolecular biology 650 $aplant physiology 650 $aÁcido Giberélico 650 $aAlumínio 650 $aBiologia Molecular 650 $aCrescimento 650 $aEletroforese 650 $aFisiologia 650 $aFolha 650 $aIsoenzima 650 $aMilho 650 $aRegulador de Crescimento 650 $aZea Mays 653 $aAluminium 653 $aGrowth 653 $aLeaf 653 $aMaize 653 $aTolerance 653 $aTolerancia
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Registro original: |
Embrapa Milho e Sorgo (CNPMS) |
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Registros recuperados : 148 | |
14. | | GOMES, E. A.; CASTANHEIRA, A. L.; SOUZA, I. R. P. de. Metabolismo, fisiologia e variabilidade genética de espiroplasmas, com ênfase em Spiroplasma kunkelii. In: OLIVEIRA, C. M. de; SABATO, E. de O. (Ed.). Doenças em milho: insetos-vetores, molicutes e vírus. Brasília, DF: Embrapa, 2017. cap. 4, p. 55-70. il. color. Texto em português e inglês. Título equivalente: Metabolism, physiology and genetic variability od spiroplasmas, with emphasis on Spiroplasma kunkelii.Tipo: Capítulo em Livro Técnico-Científico |
Biblioteca(s): Embrapa Milho e Sorgo. |
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15. | | OLIVEIRA, E. de; SOUZA, I. R. P. de; ALVES, E.; OLIVEIRA, C. M. Ocorrência de espécies de Potyvirus em milho, no Brasil. Summa Phytopathologica, Botucatu, n. 34, S. 96, Resumo 297, Feb. 2008. Edição do XXXI Congresso Paulista de Fitopatologia, Campinas, 2008.Tipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Milho e Sorgo. |
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16. | | ALVES, V. M. C.; SOUZA, I. R. P. de; CAMPOS, L. J. M.; MARRIEL, I. E. Marcador bioquímico para seleção de genótipos de milho tolerantes ao alumínio. Brazilian Journal of Plant Physiology, Campinas, v. 15, p. 387, 2003. Suplemento.
Edição dos resumos do IX Congresso Brasileiro de Fisiologia Vegetal, 2003, Atibaia, SP.Tipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Milho e Sorgo. |
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Registros recuperados : 148 | |
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Nenhum registro encontrado para a expressão de busca informada. |
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