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| Registros recuperados: 90 | |
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| Lima,Ana Lúcia da Silva; Zanella,Fábio; Schiavianto,Marlene Aparecida; Haddad,Claudia Regina Baptista. |
| Prior to abscission, nutrients are redeployed from leaves and redistributed to other parts of the plant. Data comparing nutrient resorption to soil fertility and leaf life span remains controversial in the literature. We compared nitrogen (N) conservation mechanisms among four legume trees with different leaf life spans (Hymenaea courbaril L. var. stilbocarpa (Hayne) Lee et Lang., Lonchocarpus guilleminianus (Tul.) Malme, Enterolobium contortisiliquum (Vell.) Morong and Peltophorum dubium (Spreng.) Taub.), from a semideciduous tropical forest, remnant of the Atlantic Forest. We hypothesized that these mechanisms differ among the four species and are affected by their leaf life span and by the availability of N, both as a mineral in the soil and, in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leaf life span; Nitrogen fixation; Nitrogen resorption efficiency; Nitrogen resorption proficiency; Nitrogen-use efficiency. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062006000300012 |
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| Seido, Sirando Lima; Fernandes Santos, Carlos Antonio. |
| The objectives of the present study were to construct a cowpea genetic map using the F2 population resulting from the cross IC-1 x BRS Marataoã, based on single nucleotide polymorphism (SNP) markers, and to map the cpi gene, with additional reference to introgression with the consensus map of species, aiming to identify markers for assisted selection to develop more efficient cultivars for BNF. The parents and 89 F2 plants were genotyped with 51,128 SNP markers, of which 910 polymorphic markers were used to construct the map. The results revealed 11 linkage groups, with an average of 82 markers per chromosome and average distance of 1.26 cM between markers. Recombination analysis of the SNPs indicated that markers 2_12850 and 2_00188, located in linkage... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vigna unguiculata; Nitrogen fixation; Marker-assisted selection. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42603 |
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| Sousa, Lusiene Barbosa; Stamford, Newton Pereira; Oliveira, Wagner Silva; Silva, Emmanuella Vila Nova; Martins, Marllon dos Santos; Santos, Carolina Etienne Rosália e Silva. |
| Organic matter has low N content; however, organic matter may be enriched by inoculation with selected diazotrophic bacteria. The aim of the paper was to evaluate the effects of biofertilizer produced by mixing different types and proportions of organic matter inoculated with the diazotrophic bacteria Beijerinckia indica. The experiment consisted of plastic trays (6 L) containing 5 kg of three different types of organic matter (filter mud cake, earthworm compost, and crop residue) applied in the following proportions (v:v:v): 1-(5:0:0), 2-(4:1:0), 3-(4:0:1), 4-(3:2:0), 5-(3:1:1), 6-(3:0:2), 7-(2:3:0), 8-(2:2:1), 9-(2:1:2), 10-(2:0:3), 11-(1:4:0), 12-(1:3:1), 13-(1:2:2), 14-(1:1:3), 15-(1:0:4), 16-(0:5:0), 17-(0:4:1), 18-(0:1:4), 19-(0:3:2), 20-(0:2:3), and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nitrogen fixation; Soil Microbiology Plant Nutrition Acidithiobacillus; Diazotrophic bacteria; Earthworm compost; Plant residue; Sugarcane filter mud cake. Microbiologia e Bioquímica do Solo. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35504 |
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| Dalla Santa,Osmar R.; Hernández,Ramona Fernández; Alvarez,Gergina L. Michelena; Ronzelli Junior,Pedro; Soccol,Carlos Ricardo. |
| The aim of the present work was to evaluate the inoculation effects of Azospirillum sp. RAM-7 strain, in seeds of wheat, barley and oats cultures on yield and total nitrogen content of the grains in greenhouse experiments. Seeds inoculation with Azospirillum sp. RAM-7 strain enhanced grain yields, even so, the responses vary among the evaluated cultures. For wheat, significant increases were obtained when the inoculation was associated to 100% of the recommended nitrogen, although the treatment that received only inoculation produced 7.4% above the control, however this difference wasn't significant. For barley, the presence of the inoculant substituted 20% the recommended nitrogen fertilization. For oats the inoculation with Azospirillum sp. RAM-7 didn't... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Azospirillum; Wheat; Barley; Oats; Nitrogen fixation; Plant growth promotion. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000600002 |
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| Araújo,L.M.; Huergo,L.F.; Invitti,A.L.; Gimenes,C.I.; Bonatto,A.C.; Monteiro,R.A.; Souza,E.M.; Pedrosa,F.O.; Chubatsu,L.S.. |
| Azospirillum brasilense is a diazotroph found in association with important agricultural crops. In this organism, the regulation of nitrogen fixation by ammonium ions involves several proteins including the uridylyltransferase/uridylyl-removing enzyme, GlnD, which reversibly uridylylates the two PII proteins, GlnB and GlnZ, in response to the concentration of ammonium ions. In the present study, the uridylylation/deuridylylation cycle of A. brasilense GlnB and GlnZ proteins by GlnD was reconstituted in vitro using the purified proteins. The uridylylation assay was analyzed using non-denaturing polyacrylamide gel electrophoresis and fluorescent protein detection. Our results show that the purified A. brasilense GlnB and GlnZ proteins were uridylylated by... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Azospirillum brasilense; Nitrogen fixation; PII-like protein; GlnD; GlnB; GlnZ. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2008000400006 |
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| Pisa,G.; Magnani,G.S.; Weber,H.; Souza,E.M.; Faoro,H.; Monteiro,R.A.; Daros,E.; Baura,V.; Bespalhok,J.P.; Pedrosa,F.O.; Cruz,L.M.. |
| Sugarcane is an important agricultural product of Brazil, with a total production of more than 500 million tons. Knowledge of the bacterial community associated with agricultural crops and the soil status is a decisive step towards understanding how microorganisms influence crop productivity. However, most studies aim to isolate endophytic or rhizosphere bacteria associated with the plant by culture-dependent approaches. Culture-independent approaches allow a more comprehensive view of entire bacterial communities in the environment. In the present study, we have used this approach to assess the bacterial community in the rhizosphere soil of sugarcane at different times and under different nitrogen fertilization conditions. At the high taxonomic level, few... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 16S rRNA; Biodiversity; Nitrogen fixation; Bacteria; Sugarcane; Soil. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011001200004 |
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| Sotomaior,P.; Araújo,L.M.; Nishikawa,C.Y.; Huergo,L.F.; Monteiro,R.A.; Pedrosa,F.O.; Chubatsu,L.S.; Souza,E.M.. |
| Azospirillum brasilense is a diazotroph that associates with important agricultural crops and thus has potential to be a nitrogen biofertilizer. The A. brasilense transcription regulator NifA, which seems to be constitutively expressed, activates the transcription of nitrogen fixation genes. It has been suggested that the nitrogen status-signaling protein GlnB regulates NifA activity by direct interaction with the NifA N-terminal GAF domain, preventing the inhibitory effect of this domain under conditions of nitrogen fixation. In the present study, we show that an N-terminal truncated form of NifA no longer required GlnB for activity and lost regulation by ammonium. On the other hand, in trans co-expression of the N-terminal GAF domain inhibited the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Azospirillum brasilense; NifA protein; GlnB protein; GAF domain; Nitrogen fixation. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2012001200005 |
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| Soares,René Arderius; Passaglia,Luciane Maria Pereira. |
| Bradyrhizobium elkanii is successfully used in the formulation of commercial inoculants and, together with B. japonicum, it fully supplies the plant nitrogen demands. Despite the similarity between B. japonicum and B. elkanii species, several works demonstrated genetic and physiological differences between them. In this work Representational Difference Analysis (RDA) was used for genomic comparison between B. elkanii SEMIA 587, a crop inoculant strain, and B. japonicum USDA 110, a reference strain. Two hundred sequences were obtained. From these, 46 sequences belonged exclusively to the genome of B. elkanii strain, and 154 showed similarity to sequences from B. japonicum genome. From the 46 sequences with no similarity to sequences from B. japonicum, 39... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bradyrhizobium; Genome comparison; Nitrogen fixation; Representational difference analysis. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000400036 |
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| Ruíz-Valdiviezo,Víctor Manuel; Canseco,Lucía María Cristina Ventura; Suárez,Luis Antonio Castillo; Gutiérrez-Miceli,Federico Antonio; Dendooven,Luc; Rincón-Rosales,Reiner. |
| Native rhizobia are ideal for use as commercial legume inoculants. The characteristics of the carrier used to store the inoculants are important for the survival and symbiotic potential of the rhizobia. The objective of this study was to investigate the effects of peat (PEAT), perlite sugarcane bagasse (PSB), carboxymethyl cellulose plus starch (CMCS), and yeast extract mannitol supplemented with mannitol (YEMM) on the survival, nodulation potential and N2 fixation capacity of the native strains Sinorhizobium mexicanum ITTG R7T and Rhizobium calliandrae LBP2-1T and of the reference strain Rhizobium etli CFN42T. A factorial design (4 × 3) with four repetitions was used to determine the symbiotic potential of the rhizobial strains. The survival of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rhizobia; Inoculants; Nodulation; Nitrogen fixation; Carrier. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000300735 |
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| Chauhan,Anjali; Guleria,Shiwani; Balgir,Praveen P.; Walia,Abhishek; Mahajan,Rishi; Mehta,Preeti; Shirkot,Chand Karan. |
| Abstract Aneurinibacillus aneurinilyticus strain CKMV1 was isolated from rhizosphere of Valeriana jatamansi and possessed multiple plant growth promoting traits like production of phosphate solubilization (260 mg/L), nitrogen fixation (202.91 nmol ethylene mL-1 h-1), indole-3-acetic acid (IAA) (8.1 µg/mL), siderophores (61.60%), HCN (hydrogen cyanide) production and antifungal activity. We investigated the ability of isolate CKMV1 to solubilize insoluble P via mechanism of organic acid production. High-performance liquid chromatography (HPLC) study showed that isolate CKMV1 produced mainly gluconic (1.34%) and oxalic acids. However, genetic evidences for nitrogen fixation and phosphate solubilization by organic acid production have been reported first time... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Valeriana jatamansi; Phosphate solubilization; Nitrogen fixation; Glucose dehydrogenase; Aneurinibacillus aneurinilyticus; PGPR. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822017000200294 |
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| Plascencia Jiménez, Raúl. |
| Para evaluar microorganismos de la rizosfera de Bouteloua curtipendula (Michx.) Torr., se recolectó suelo de cinco localidades 1) Salinas, San Luis Potosí 2) Ejido, Jacalón, Salinas, San Luis Potosí; 3) Calera, Zacatecas; 4) Santa María del Oro, Durango y 5) Crucero La Zarca, Durango. La población de actinomicetos, bacterias y hongos, se estimó con diluciones seriadas (10-1 a 10-10). Los actinomicetos (AS), bacterias (BS) y hongos (HS) se estimaron con diluciones 10-3 a 10-5; 10-5 a 10-7; 10-2 a 10-4, respectivamente, con cinco repeticiones. Las siembras en placa se incubaron a 30 °C. Las unidades formadoras de colonias de bacterias (ufc) se cuantificaron a 24, 48 y 72 h; mientras que, para actinomicetos y hongos, las ufc se cuantificaron a 7, 8 y 9 d. En... |
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Palavras-chave: Bouteloua; Fijación de nitrógeno; Forraje; Inoculación; Nitrogen fixation; Forage; Inoculation; Ganadería; Maestría. |
| Ano: 2013 |
URL: http://hdl.handle.net/10521/2139 |
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| Souza,Rocheli de; Ambrosini,Adriana; Passaglia,Luciane M.P.. |
| Abstract Plant-microbe interactions in the rhizosphere are the determinants of plant health, productivity and soil fertility. Plant growth-promoting bacteria (PGPB) are bacteria that can enhance plant growth and protect plants from disease and abiotic stresses through a wide variety of mechanisms; those that establish close associations with plants, such as the endophytes, could be more successful in plant growth promotion. Several important bacterial characteristics, such as biological nitrogen fixation, phosphate solubilization, ACC deaminase activity, and production of siderophores and phytohormones, can be assessed as plant growth promotion (PGP) traits. Bacterial inoculants can contribute to increase agronomic efficiency by reducing production costs... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nitrogen fixation; Siderophore production; Plant-bacteria interaction; Inoculant; Rhizosphere. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000400401 |
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| CARVALHO, G. A. B. de; BATISTA, J. S. S.; MARCELINO, F. C.; HUNGRIA, M.. |
| ABSTRACT: Soybean [Glycine max (L.) Merr.] is the most important legume cropped worldwide, with an economic value attributed mainly to the high protein content of the grain, which, in turn, demands a heavy supply of nitrogen. An environmentally friendly source of nitrogen at low cost to farmers is represented by the biological fixation of atmospheric nitrogen that takes place is association with symbiotic bacteria. For the soybean, the association occurs mainly with bacteria belonging to the species Bradyrhizobium japonicum and Bradyrhizobium elkanii, but our knowledge about gene expression associated with the symbiosis is still poor. This work - part of an effort by the Soybean Genome Consortium (Genosoja)?was conducted with the aim of achieving better... |
| Tipo: Artigo de periódico |
Palavras-chave: Soja; Inoculação; Fixação de nitrogênio; Soybeans; Nitrogen fixation; Root inoculation. |
| Ano: 2012 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/945205 |
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| Embrapa Gado de Corte (Campo Grande, MS). |
| Equipe multidisciplinar: Ademir Hugo Zimmer, CNPGC; Armindo Neivo Kichel, CNPGC; Bela Grof; Carlos Maurício Soares de Andrade; Celso Dornelas Fernandes, CNPGC; Francisco Assis Rolim Pereira; Haroldo Pires Queiroz, CNPGC; Hortência Maria Abranches Purcino; Jaqueline Rosemeire Verzignassi, CNPGC; José Alexandre Agiova da Costa, CNPGC; José Marcelino Sobrinho (in memorian); José Marques da Silva, CNPGC; José Raul Valério, CNPGC; Leônidas da Costa Schalcher Valle; Manuel Cláudio Motta Macedo, CNPGC; Maria José D´Ávila Charchar; Maria do Socorro Bona Nascimento; Marta Pereira da Silva; Rosângela Maria Simeão Resende; Roza Maria Shunke. Histórico e descrição da cultivar. Principais atributos do estilosantes-campo-grande. Fixação biológica de nitrogênio e valor... |
| Tipo: Folhetos |
Palavras-chave: Estilosantes; Desempenho animal; Consorciação; Campo Grande; Mato Grosso do Sul; Brasil; Management; Feed crops; Sustainability; Mixed pastures; Pests of plants; Plant diseases; Desenvolvimento Sustentável; Doença de Planta; Erva Daninha; Fixação de Nitrogênio; Historia; Manejo; Leguminosae; Leguminosa Forrageira; Pastejo; Nutrição Animal; Pastagem; Produção Animal; Praga de Planta; Planta Forrageira; Valor Nutritivo; Sistema de Cultivo; Animal performance; Animal nutrition; Stylosanthes; Animal production; Brazil; Grazing; Cropping systems; History; Pastures; Nutritive value; Nitrogen fixation; Weeds. |
| Ano: 2007 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/319150 |
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| Registros recuperados: 90 | |
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