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	Provedor de dados BJM (1) Rev. Bras. Fisiol. Veg. (1) Autor DÍAZ,PEDRO (1) GONNET,SUSANA (1) Morais-Júnior,Marcos Antonio de (1) Palavra-chave Ammonia assimilation (2) Enzyme activity (1) Glutamate dehydrogenase (1) Kluyveromyces marxianus (1) Leghemoglobin (1) Mesorhizobium loti (1) Nitrogen fixation (1) Nitrogenase (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2003 (1) 2000 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Glutamine synthetase and glutamate synthase activities in relation to nitrogen fixation in Lotus spp. Rev. Bras. Fisiol. Veg. GONNET,SUSANA; DÍAZ,PEDRO. Lotus corniculatus, L. tenuis, L. pedunculatus, and L. subbiflorus inoculated with Mesorhizobium loti NZP2037 strain were grown in a growth chamber. The plants dry weight (DW), the nodule fresh weight (FW), the nitrogenase activity, the nodule glutamine synthetase (GS) and glutamate synthase (GOGAT) activities, as well as the leghemoglobin content and the amino acid in the stem were measured 28 days after inoculation. The highest DW of plants was measured in L. tenuis and the highest FW of nodules was measured in L. pedunculatus. Nitrogenase activity in L. tenuis, L. pedunculatus and L. subbiflorus was six fold the activity in L. corniculatus. Nodule GS and GOGAT activities did not follow this same pattern. L. tenuis had the highest values of GS and GOGAT... Tipo: Info:eu-repo/semantics/article Palavras-chave: Nitrogen fixation; Nitrogenase; Mesorhizobium loti; Leghemoglobin; Ammonia assimilation. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-31312000000300003 The NADP+-dependent glutamate dehydrogenase of the yeast Kluyveromyces marxianus responds to nitrogen repression similarly to Saccharomyces cerevisiae BJM Morais-Júnior,Marcos Antonio de. NADP+-dependent glutamate dehydrogenase (NADP+-Gdh) is the first step in ammonia assimilation pathway in Saccharomyces cerevisiae and the knowledge of its regulation is the key for many biotechnological purposes such as single cell protein production. The regulation of NADP+-Gdh activity in Kluyveromyces marxianus cells was evaluated under different ammonia supply in batch cultivations. The results showed that K. marxianus NADP+-Gdh activity is induced over a narrow range of extracellular ammonia supply, being repressed by both high ammonia concentration and the glutamate formed. This activity is not growth-associated and may function mainly to trace low amounts of ammonia after growth cessation. The results demonstrated that NADP+-Gdh may not be the main... Tipo: Info:eu-repo/semantics/article Palavras-chave: Ammonia assimilation; Enzyme activity; Glutamate dehydrogenase; Kluyveromyces marxianus. Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000400009 Registros recuperados: 2 Primeira ... 1 ... Última

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