Nitrogen Assimilation Enzymes
Mostrando 1-12 de 72 artigos, teses e dissertações.
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1. Evaluation of physiological effect of fungicides on soybean crop / Avaliação do efeito fisiológico do uso de fungicidas na cultura de soja
The use of products with tonic action in plants has stimulated research in different areas of agriculture, where the use of fungicides with physiological effect became important. One of the most promising is the strobilurin Pyraclostrobin, that in addition to the fungicidal action has caused an increase in productivity attributed to the physiological effects
Publicado em: 2009
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2. Efeito da fonte de carbono e nitrogênio na produção de β1,3glucanases por Trichoderma asperellum / Effect of source of carbon and nitrogen in the production of β-1 ,3-glucanase by Trichoderma asperellum
The β-1.3-glucanases have several functions in the cell as fungal metabolic in hydrolysis of polysaccharides for possible cellular assimilation; morphogenetic function in the hydrolysis or modifications of the cell wall, which includes growth and extension of the wall, altering the structure and composition of the wall and autolysis. In addition to pres
Publicado em: 2008
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3. Nitrogen assimilation in Citrus based on CitEST data mining
Assimilation of nitrate and ammonium are vital procedures for plant development and growth. From these primary paths of inorganic nitrogen assimilation, this metabolism integrates diverse paths for biosynthesis of macromolecules, such as amino acids and nucleotides, and the central intermediate metabolism, like carbon metabolism and photorespiration. This pa
Genetics and Molecular Biology. Publicado em: 2007
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4. The role of nitrate reductase and asparagine synthetase in soybean (Glycine max L.) under nitrogen stress / Papel da redutase do nitrato e da asparagina sintetase em plantas de soja (Glycine max L.) sob condições de estresse de nitrogenio
The root system of soybean (Glycine max L.) is an important site for the assimilation of nitrogen, whether by nitrate assimilation in the roots, or by symbiotic nitrogen fixation in the nodules. The main products of inorganic nitrogen assimilation, the amino acids asparagine and glutamine and the ureides allantoin and allantoic acid, are used in the transpor
Publicado em: 2007
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5. Metabolismo do nitrogênio e estado nutricional do cafeeiro (Coffea arabica) / Nitrate reductase and glutamine synthetase activity during coffee plant reproduction
The aim of this work was to evaluate the nitrate reductase (NR) and glutamine synthetase (GS) activity, total soluble protein content (PTS) in coffee leaves during the fruits development in field conditions. The study was carried out in ESALQ/USP (University of São Paulo), Piracicaba, São Paulo, Brazil in a Red Nitosol eutrofic. The experimental design was
Publicado em: 2007
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6. Absorção, assimilação e remobilização de nitrogênio em arroz, sob nutrição nítrica. Avaliação da expressão gênica diferencial. / Nitrogen uptake, assimilation and remobilization in rice under supply of nitrate. Evaluation of differential genic expression
O arroz é um dos mais importantes cereais para o homem, porque é fonte primária na alimentação de mais da metade da população do mundo. As plantas necessitam de nitrogênio para seu desenvolvimento, sendo este presente em solos aerados, na forma de nitrato. Em função do desgaste das áreas cultivadas, tem sido intensificada a utilização de fertili
Publicado em: 2007
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7. Metabolism of nitrogen compounds and carbohydrates, and modification of cell wall of citrus infected by Xylella fastidiosa / Metabolismo de compostos nitrogenados e carboidratos, e alterações nas paredes celulares de plantas de citros infectadas por Xylella fastidiosa
Xylellafastidiosa (Xj) is a fastidious bacterium which grows exclusively in the xylem of several plants. In citrus the disease caused by Xf is known as "clorose variegada do citros" (CVC), being responsible for marked loss of productivity since the 80s. Although a meaningful number of reports have been published in the literature about Xf, little is know abo
Publicado em: 2006
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8. Fixação e reações de assimilação de N em Crotalaria juncea L
Crotalaria juncea L. is a legume widely used as green manure. The objective of this work was to obtain basic information on the influence of the N-NH/ in the growth and production of nitrogen compounds and enzymes involved in nitrogen assimilation in this species. The responses of plants, inoculated (I) or not (NI) with Rhizobium to the presence (+N) or abse
Publicado em: 2002
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9. Metabolismo do nitrogenio durante a fase do desenvolvimento reprodutivo da soja
The objective of the present investigation was to obtain information on the relative contribution of the leaf and pod of the soybean plant in the supply of reduced nitrogen for the synthesis of amino acids and protein in the seed. For this study, the activities of nitrate reductase, glutamine synthetase and glutamate dehydrogenase were determined in the leaf
Publicado em: 1981
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10. Effect of the gln-1b mutation on nitrogen metabolite repression in Neurospora crassa.
In Neurospora crassa, synthesis of the enzymes of nitrate assimilation, nitrate reductase and nitrite reductase, was repressed by the presence of ammonium, glutamate, or glutamine. This phenomenon was a manifestation of the regulatory process termed nitrogen metabolite repression whereby alternative pathways of nitrogen acquisition are not expressed in cells
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11. Nitrogen Metabolism of Lemna minor. II. Enzymes of Nitrate Assimilation and Some Aspects of Their Regulation 1
In L. minor grown in sterile culture, the primary enzymes of nitrate assimilation, nitrate reductase (NR), nitrite reductase (NiR) and glutamate dehydrogenase (GDH) change in response to nitrogen source. NR and NiR levels are low when grown on amino acids (hydrolyzed casein) or ammonia; both enzymes are rapidly induced on addition of nitrate, while addition
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12. Control by Cesium and Intermediates of the Citric Acid Cycle of Extracellular Ribonuclease and Other Enzymes Involved in the Assimilation of Nitrogen
Synthesis of extracellular ribonuclease is induced in cell cultures of Ustilago sphaerogena that are starved for nitrogen and exposed to the gratuitous inducer, 6-mercaptopurine. Cesium, ammonium, or alkylammonium ion represses ribonuclease induction. Addition of citric-acid cycle intermediates to cesium ionrepressed cultures partially restores the rate of r