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	Provedor de dados BJM (1) Rev. Bras. Fisiol. Veg. (1) Autor Costa,Roberto Cezar Lobo da (1) DÍAZ,PEDRO (1) GONNET,SUSANA (1) Oliveira,José Tadeu Abreu (1) Silveira,Joaquim Albenísio Gomes da (1) Palavra-chave Leghemoglobin (2) Ammonia assimilation (1) Glutamine synthetase (1) Mesorhizobium loti (1) N2 fixation (1) Nitrate reductase (1) Nitrogen fixation (1) Nitrogenase (1) Vigna unguiculata (L.) Walp (1) Water stress (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2001 (1) 2000 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última DROUGHT-INDUCED EFFECTS AND RECOVERY OF NITRATE ASSIMILATION AND NODULE ACTIVITY IN COWPEA PLANTS INOCULATED WITH BRADYRHIZOBIUM SPP. UNDER MODERATE NITRATE LEVEL BJM Silveira,Joaquim Albenísio Gomes da; Costa,Roberto Cezar Lobo da; Oliveira,José Tadeu Abreu. This study was carried out to establish comparative effects of drought and recovery on the nitrate assimilation and nodule activity related to N2 fixation in cowpea plants [Vigna unguiculata L. (Walp.)] previously inoculated with Bradyrhizobium spp. BR-3256 (CB-756) strain in the presence of 5 mol m-3 NO-3. Twenty-eight-day-old nodulated plants were submitted to water deprivation during 4 consecutive days and afterwards resupplied with nutrient solution during 2 days. The water deprivation caused a rapid increase in the nitrate content in root and a marked reduction in leaf nitrate reductase (NR) activity. In contrast nodule NR activity was slightly increased by water deprivation. Concomitantly, in nodules of water stressed plants, leghemoglobin and... Tipo: Info:eu-repo/semantics/article Palavras-chave: Glutamine synthetase; Leghemoglobin; Nitrate reductase; N2 fixation; Water stress; Vigna unguiculata (L.) Walp. Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822001000300005 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 Registros recuperados: 2 Primeira ... 1 ... Última

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