Base de dados : MEDLINE
Pesquisa : G15.682 [Categoria DeCS]
Referências encontradas : 559 [refinar]
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[PMID]:29304107
[Au] Autor:Zdyb A; Salgado MG; Demchenko KN; Brenner WG; Plaszczyca M; Stumpe M; Herrfurth C; Feussner I; Pawlowski K
[Ad] Endereço:Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden.
[Ti] Título:Allene oxide synthase, allene oxide cyclase and jasmonic acid levels in Lotus japonicus nodules.
[So] Source:PLoS One;13(1):e0190884, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Jasmonic acid (JA), its derivatives and its precursor cis-12-oxo phytodienoic acid (OPDA) form a group of phytohormones, the jasmonates, representing signal molecules involved in plant stress responses, in the defense against pathogens as well as in development. Elevated levels of JA have been shown to play a role in arbuscular mycorrhiza and in the induction of nitrogen-fixing root nodules. In this study, the gene families of two committed enzymes of the JA biosynthetic pathway, allene oxide synthase (AOS) and allene oxide cyclase (AOC), were characterized in the determinate nodule-forming model legume Lotus japonicus JA levels were to be analysed in the course of nodulation. Since in all L. japonicus organs examined, JA levels increased upon mechanical disturbance and wounding, an aeroponic culture system was established to allow for a quick harvest, followed by the analysis of JA levels in whole root and shoot systems. Nodulated plants were compared with non-nodulated plants grown on nitrate or ammonium as N source, respectively, over a five week-period. JA levels turned out to be more or less stable independently of the growth conditions. However, L. japonicus nodules formed on aeroponically grown plants often showed patches of cells with reduced bacteroid density, presumably a stress symptom. Immunolocalization using a heterologous antibody showed that the vascular systems of these nodules also seemed to contain less AOC protein than those of nodules of plants grown in perlite/vermiculite. Hence, aeroponically grown L. japonicus plants are likely to be habituated to stress which could have affected JA levels.
[Mh] Termos MeSH primário: Ciclopentanos/metabolismo
Fabaceae/fisiologia
Oxirredutases Intramoleculares/metabolismo
Loteae/metabolismo
Oxilipinas/metabolismo
Nodulação
[Mh] Termos MeSH secundário: Oxirredutases Intramoleculares/genética
Loteae/enzimologia
RNA Mensageiro/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, N.I.H., EXTRAMURAL
[Nm] Nome de substância:
0 (Cyclopentanes); 0 (Oxylipins); 0 (RNA, Messenger); 6RI5N05OWW (jasmonic acid); EC 5.3.- (Intramolecular Oxidoreductases); EC 5.3.99.6 (hydroperoxide isomerase)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180223
[Lr] Data última revisão:
180223
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180106
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0190884


  2 / 559 MEDLINE  
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[PMID]:28945786
[Au] Autor:Zhang H; Cao Y; Shang C; Li J; Wang J; Wu Z; Ma L; Qi T; Fu C; Bai Z; Hu B
[Ad] Endereço:College of Life Science, Northeast Agricultural University, Harbin, China.
[Ti] Título:Genome-wide characterization of GRAS family genes in Medicago truncatula reveals their evolutionary dynamics and functional diversification.
[So] Source:PLoS One;12(9):e0185439, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The GRAS gene family is a large plant-specific family of transcription factors that are involved in diverse processes during plant development. Medicago truncatula is an ideal model plant for genetic research in legumes, and specifically for studying nodulation, which is crucial for nitrogen fixation. In this study, 59 MtGRAS genes were identified and classified into eight distinct subgroups based on phylogenetic relationships. Motifs located in the C-termini were conserved across the subgroups, while motifs in the N-termini were subfamily specific. Gene duplication was the main evolutionary force for MtGRAS expansion, especially proliferation of the LISCL subgroup. Seventeen duplicated genes showed strong effects of purifying selection and diverse expression patterns, highlighting their functional importance and diversification after duplication. Thirty MtGRAS genes, including NSP1 and NSP2, were preferentially expressed in nodules, indicating possible roles in the process of nodulation. A transcriptome study, combined with gene expression analysis under different stress conditions, suggested potential functions of MtGRAS genes in various biological pathways and stress responses. Taken together, these comprehensive analyses provide basic information for understanding the potential functions of GRAS genes, and will facilitate further discovery of MtGRAS gene functions.
[Mh] Termos MeSH primário: Genes de Plantas
Medicago truncatula/genética
[Mh] Termos MeSH secundário: Sequência de Aminoácidos
Mapeamento Cromossômico
Cromossomos de Plantas/genética
Evolução Molecular
Duplicação Gênica
Perfilação da Expressão Gênica
Regulação da Expressão Gênica de Plantas
Medicago truncatula/crescimento & desenvolvimento
Medicago truncatula/fisiologia
Família Multigênica
Fixação de Nitrogênio/genética
Filogenia
Proteínas de Plantas/genética
Nodulação/genética
Homologia de Sequência de Aminoácidos
Estresse Fisiológico
Fatores de Transcrição/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Plant Proteins); 0 (Transcription Factors)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171016
[Lr] Data última revisão:
171016
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170926
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0185439


  3 / 559 MEDLINE  
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[PMID]:28418289
[Au] Autor:Rajer FU; Wu H; Xie Y; Xie S; Raza W; Tahir HAS; Gao X
[Ad] Endereço:Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Nanjing 210095, PR China.
[Ti] Título:Volatile organic compounds produced by a soil-isolate, Bacillus subtilis FA26 induce adverse ultra-structural changes to the cells of Clavibacter michiganensis ssp. sepedonicus, the causal agent of bacterial ring rot of potato.
[So] Source:Microbiology;163(4):523-530, 2017 Apr.
[Is] ISSN:1465-2080
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Rhizobacterial volatile organic compounds (VOCs) play an important role in the suppression of soil-borne phytopathogens. In this study, the VOCs produced by a soil-isolate, Bacillus subtilis FA26, were evaluated in vitro for their antibacterial activity against Clavibacter michiganensis ssp. sepedonicus (Cms), the causal agent of bacterial ring rot of potato. The VOCs emitted by FA26 inhibited the growth of Cms significantly compared with the control. Scanning and transmission electron microscopy analyses revealed distorted colony morphology and a wide range of abnormalities in Cms cells exposed to the VOCs of FA26. Varying the inoculation strategy and inoculum size showed that the production and activity of the antibacterial VOCs of FA26 were dependent on the culture conditions. Headspace solid-phase microextraction/gas chromatography-mass spectrometry analyses revealed that FA26 produced 11 VOCs. Four VOCs (benzaldehyde, nonanal, benzothiazole and acetophenone) were associated with the antibacterial activity against Cms. The results suggested that the VOCs produced by FA26 could control the causal agent of bacterial ring rot of potato. This information will increase our understanding of the microbial interactions mediated by VOCs in nature and aid the development of safer strategies for controlling plant disease.
[Mh] Termos MeSH primário: Antibacterianos/farmacologia
Bacillus subtilis/metabolismo
Micrococcaceae/efeitos dos fármacos
Micrococcaceae/ultraestrutura
Compostos Orgânicos Voláteis/metabolismo
Compostos Orgânicos Voláteis/farmacologia
[Mh] Termos MeSH secundário: Acetofenonas/metabolismo
Acetofenonas/farmacologia
Aldeídos/metabolismo
Aldeídos/farmacologia
Antibacterianos/biossíntese
Benzaldeídos/metabolismo
Benzaldeídos/farmacologia
Benzotiazóis/metabolismo
Benzotiazóis/farmacologia
Cromatografia Gasosa-Espectrometria de Massas
Testes de Sensibilidade Microbiana
Micrococcaceae/crescimento & desenvolvimento
Doenças das Plantas/microbiologia
Nodulação/fisiologia
Microbiologia do Solo
Solanum tuberosum/microbiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Acetophenones); 0 (Aldehydes); 0 (Anti-Bacterial Agents); 0 (Benzaldehydes); 0 (Benzothiazoles); 0 (Volatile Organic Compounds); 2L2WBY9K6T (nonanal); G5BW2593EP (benzothiazole); RK493WHV10 (acetophenone); TA269SD04T (benzaldehyde)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171009
[Lr] Data última revisão:
171009
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170419
[St] Status:MEDLINE
[do] DOI:10.1099/mic.0.000451


  4 / 559 MEDLINE  
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[PMID]:28255691
[Au] Autor:Meneses N; Taboada H; Dunn MF; Vargas MDC; Buchs N; Heller M; Encarnación S
[Ad] Endereço:Programa de Genómica Funcional de Procariotes, Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, 62210, Cuernavaca, Morelos, Mexico.
[Ti] Título:The naringenin-induced exoproteome of Rhizobium etli CE3.
[So] Source:Arch Microbiol;199(5):737-755, 2017 Jul.
[Is] ISSN:1432-072X
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Flavonoids excreted by legume roots induce the expression of symbiotically essential nodulation (nod) genes in rhizobia, as well as that of specific protein export systems. In the bean microsymbiont Rhizobium etli CE3, nod genes are induced by the flavonoid naringenin. In this study, we identified 693 proteins in the exoproteome of strain CE3 grown in minimal medium with or without naringenin, with 101 and 100 exoproteins being exclusive to these conditions, respectively. Four hundred ninety-two (71%) of the extracellular proteins were found in both cultures. Of the total exoproteins identified, nearly 35% were also present in the intracellular proteome of R. etli bacteroids, 27% had N-terminal signal sequences and a significant number had previously demonstrated or possible novel roles in symbiosis, including bacterial cell surface modification, adhesins, proteins classified as MAMPs (microbe-associated molecular patterns), such as flagellin and EF-Tu, and several normally cytoplasmic proteins as Ndk and glycolytic enzymes, which are known to have extracellular "moonlighting" roles in bacteria that interact with eukaryotic cells. It is noteworthy that the transmembrane ß (1,2) glucan biosynthesis protein NdvB, an essential symbiotic protein in rhizobia, was found in the R. etli naringenin-induced exoproteome. In addition, potential binding sites for two nod-gene transcriptional regulators (NodD) occurred somewhat more frequently in the promoters of genes encoding naringenin-induced exoproteins in comparison to those ofexoproteins found in the control condition.
[Mh] Termos MeSH primário: Proteínas de Bactérias/metabolismo
Flavanonas/farmacologia
Nodulação/genética
Proteoma/metabolismo
Rhizobium etli/genética
Rhizobium etli/metabolismo
[Mh] Termos MeSH secundário: Proteínas de Bactérias/genética
Fabaceae/microbiologia
Regulação da Expressão Gênica
Fixação de Nitrogênio/genética
Raízes de Plantas/metabolismo
Raízes de Plantas/microbiologia
Proteoma/genética
Simbiose/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Bacterial Proteins); 0 (Flavanones); 0 (Proteome); HN5425SBF2 (naringenin)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171101
[Lr] Data última revisão:
171101
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170304
[St] Status:MEDLINE
[do] DOI:10.1007/s00203-017-1351-8


  5 / 559 MEDLINE  
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[PMID]:28167037
[Au] Autor:Valentine AJ; Kleinert A; Benedito VA
[Ad] Endereço:Botany and Zoology Department, University of Stellenbosch, Private Bag X1, Matieland, 7602, South Africa. Electronic address: ajv@sun.ac.za.
[Ti] Título:Adaptive strategies for nitrogen metabolism in phosphate deficient legume nodules.
[So] Source:Plant Sci;256:46-52, 2017 Mar.
[Is] ISSN:1873-2259
[Cp] País de publicação:Ireland
[La] Idioma:eng
[Ab] Resumo:Legumes play a significant role in natural and agricultural ecosystems. They can fix atmospheric N and contribute the fixed N to soils and plant N budgets. In legumes, the availability of P does not only affect nodule development, but also N acquisition and metabolism. For legumes as an important source of plant proteins, their capacity to metabolise N during P deficiency is critical for their benefits to agriculture and the natural environment. In particular for farming, rock P is a non-renewable source of which the world has about 60-80 years of sustainable extraction of this P left. The global production of legume crops would be devastated during a scarcity of P fertiliser. Legume nodules have a high requirement for mineral P, which makes them vulnerable to soil P deficiencies. In order to maintain N metabolism, the nodules have evolved several strategies to resist the immediate effects of P limitation and to respond to prolonged P deficiency. In legumes nodules, N metabolism is determined by several processes involving the acquisition, assimilation, export, and recycling of N in various forms. Although these processes are integrated, the current literature lacks a clear synthesis of how legumes respond to P stress regarding its impact on N metabolism. In this review, we synthesise the current state of knowledge on how legumes maintain N metabolism during P deficiency. Moreover, we discuss the potential importance of two additional alterations to N metabolism during P deficiency. Our goals are to place these newly proposed mechanisms in perspective with other known adaptations of N metabolism to P deficiency and to discuss their practical benefits during P deficiency in legumes.
[Mh] Termos MeSH primário: Adaptação Fisiológica
Fabaceae/metabolismo
Nitrogênio/metabolismo
Fosfatos/metabolismo
Fósforo/metabolismo
Nódulos Radiculares de Plantas/metabolismo
[Mh] Termos MeSH secundário: Fixação de Nitrogênio
Fosfatos/deficiência
Fósforo/deficiência
Nodulação
Rhizobium
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Nm] Nome de substância:
0 (Phosphates); 27YLU75U4W (Phosphorus); N762921K75 (Nitrogen)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170417
[Lr] Data última revisão:
170417
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170208
[St] Status:MEDLINE


  6 / 559 MEDLINE  
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[PMID]:28152300
[Au] Autor:Ryu H; Laffont C; Frugier F; Hwang I
[Ad] Endereço:Department of Life Sciences, POSTECH Biotech Center, Pohang University of Science and Technology, Pohang 37673, Korea.
[Ti] Título:MAP Kinase-Mediated Negative Regulation of Symbiotic Nodule Formation in .
[So] Source:Mol Cells;40(1):17-23, 2017 Jan.
[Is] ISSN:0219-1032
[Cp] País de publicação:Korea (South)
[La] Idioma:eng
[Ab] Resumo:Mitogen-activated protein kinase (MAPK) signaling cascades play critical roles in various cellular events in plants, including stress responses, innate immunity, hormone signaling, and cell specificity. MAPK-mediated stress signaling is also known to negatively regulate nitrogen-fixing symbiotic interactions, but the molecular mechanism of the MAPK signaling cascades underlying the symbiotic nodule development remains largely unknown. We show that the MtMKK5-MtMPK3/6 signaling module negatively regulates the early symbiotic nodule formation, probably upstream of ERN1 (ERF Required for Nodulation 1) and NSP1 (Nod factor Signaling Pathway 1) in . The overexpression of stimulated stress and defense signaling pathways but also reduced nodule formation in roots. Conversely, a MAPK specific inhibitor, U0126, enhanced nodule formation and the expression of an early nodulation marker gene, . We found that MtMKK5 directly activates MtMPK3/6 by phosphorylating the TEY motif within the activation loop and that the MtMPK3/6 proteins physically interact with the early nodulation-related transcription factors ERN1 and NSP1. These data suggest that the stress signaling-mediated MtMKK5/MtMPK3/6 module suppresses symbiotic nodule development via the action of early nodulation transcription factors.
[Mh] Termos MeSH primário: Medicago truncatula/enzimologia
Medicago truncatula/crescimento & desenvolvimento
Proteínas Quinases Ativadas por Mitógeno/metabolismo
[Mh] Termos MeSH secundário: Sistema de Sinalização das MAP Quinases
Fixação de Nitrogênio
Nodulação/fisiologia
Nódulos Radiculares de Plantas/enzimologia
Nódulos Radiculares de Plantas/crescimento & desenvolvimento
Simbiose
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
EC 2.7.11.24 (Mitogen-Activated Protein Kinases)
[Em] Mês de entrada:1705
[Cu] Atualização por classe:170515
[Lr] Data última revisão:
170515
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170203
[St] Status:MEDLINE
[do] DOI:10.14348/molcells.2017.2211


  7 / 559 MEDLINE  
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[PMID]:28107731
[Au] Autor:Ghasemi Siani N; Fallah S; Pokhrel LR; Rostamnejadi A
[Ad] Endereço:Department of Agronomy, Faculty of Agriculture, Shahrekord University, Shahrekord, Iran.
[Ti] Título:Natural amelioration of Zinc oxide nanoparticle toxicity in fenugreek (Trigonella foenum-gracum) by arbuscular mycorrhizal (Glomus intraradices) secretion of glomalin.
[So] Source:Plant Physiol Biochem;112:227-238, 2017 Mar.
[Is] ISSN:1873-2690
[Cp] País de publicação:France
[La] Idioma:eng
[Ab] Resumo:Owing to rising production and use of engineered nanoparticles (ENPs) in the myriad of consumer applications, ENPs are being released into the environment where their potential fate and effects have remained unclear. With naturally occurring arbuscular mycorrhizal fungus (AMF; Glomus intraradices) in soils, their influence (positive or negative) on ENPs toxicity in plants is not well documented. Herein, we investigated potential influence of AMF on the growth and development in fenugreek (Trigonella foenum-graecum) under varied Zinc oxide nanoparticles (ZnONPs) treatments (0, 125, 250, 375 and 500 µg g ). Results showed that in the absence of AMF, increasing ZnONPs concentrations caused significant decline in root nodule number and biomass in fenugreek. In non-AMF plants, shoot length, and biomass of both root and shoot decreased at ≥375 µg g of ZnONPs treatment; while Zn uptake by shoot and root increased as a function of ZnONPs treatments. Interestingly, AMF colonization in roots significantly diminished at 375 µg g ZnONPs treatment compared to controls. More importantly, AMF inoculation ameliorated inhibitory effects of ZnONPs by promoting secretion of glycoprotein called glomalin-a potent metal chelator-within the rhizosphere, which significantly reduced (by almost half) Zn uptake by root and subsequent translocation to the shoot. AMF inoculation (high glomalin secretion)-mediated low Zn uptake might have been stimulatory to promote root and shoot growth in fenugreek. The results highlight significant protective roles of rhizospheric AMF through glomalin secretion thereby ameliorating nanotoxicity in plants, and underscore the need to include soil-microbial interactions when assessing nanophytotoxicology and risks. Furthermore, potential positive implications to other organisms in the food chain can be inferred due to low tropic transfer of ENPs and/or associated toxic dissolved ions in the presence of naturally occurring soil fingi.
[Mh] Termos MeSH primário: Proteínas Fúngicas/secreção
Glicoproteínas/secreção
Micorrizas/metabolismo
Nanopartículas/toxicidade
Trigonella/metabolismo
Óxido de Zinco/toxicidade
[Mh] Termos MeSH secundário: Biodegradação Ambiental/efeitos dos fármacos
Biomassa
Hidrodinâmica
Modelos Lineares
Micorrizas/efeitos dos fármacos
Nanopartículas/ultraestrutura
Tamanho da Partícula
Folhas de Planta/efeitos dos fármacos
Folhas de Planta/ultraestrutura
Nodulação/efeitos dos fármacos
Brotos de Planta/anatomia & histologia
Brotos de Planta/efeitos dos fármacos
Brotos de Planta/metabolismo
Rizosfera
Solo
Trigonella/anatomia & histologia
Trigonella/efeitos dos fármacos
Difração de Raios X
Zinco/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Fungal Proteins); 0 (Glycoproteins); 0 (Soil); 0 (glomalin, Mycorrhizae); J41CSQ7QDS (Zinc); SOI2LOH54Z (Zinc Oxide)
[Em] Mês de entrada:1705
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170121
[St] Status:MEDLINE


  8 / 559 MEDLINE  
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[PMID]:28094097
[Au] Autor:Santos JM; Casaes Alves PA; Silva VC; Kruschewsky Rhem MF; James EK; Gross E
[Ad] Endereço:Programa de Pós-Graduação em Biotecnologia, Universidade Estadual de Feira de Santana, Brazil.
[Ti] Título:Diverse genotypes of Bradyrhizobium nodulate herbaceous Chamaecrista (Moench) (Fabaceae, Caesalpinioideae) species in Brazil.
[So] Source:Syst Appl Microbiol;40(2):69-79, 2017 Mar.
[Is] ISSN:1618-0984
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:The genus Chamaecrista comprises more than 330 species which are mainly distributed across tropical America, especially in Brazil (256 spp.), the main center of radiation. In this study, nodulation of herbaceous Chamaecrista species that are commonly found growing in different vegetation types in the north eastern Brazilian state of Bahia was assessed together with the diversity of rhizobia isolated from their root nodules. Genetic characterization of the isolates was performed using molecular markers to examine the phylogeny of their "core" (16S rRNA, ITS, recA, glnII, dnaK and gyrB) and symbiosis-related (nifH, nodC) genomes. Nodule morphology, anatomy and ultrastructure were also examined, as was the capacity of the isolates to form nodules on Chamaecrista desvauxii and siratro (Macroptilium atropurpureum). Analysis of 16S rRNA gene sequences demonstrated that the isolates belonged to seven clusters within the genus Bradyrhizobium, and more detailed analyses using sequences of the ITS region and concatenated housekeeping genes grouped the Chamaecrista rhizobia by vegetation type and plant species. These analyses also suggested some potentially novel Bradyrhizobium species, which was corroborated by analyses of their nifH and nodC sequences, as these formed separated branches from all Bradyrhizobium type strains. All the 47 strains tested produced effective nodules on C. desvauxii but none on siratro. Chamaecrista nodules are herein described for the first time in detail: they are indeterminate and structurally similar to others described in the Caesalpinioideae, with infection threads in the invasion and nitrogen fixation zones, and with both infected and uninfected (interstitial) cells in the nitrogen fixation zone.
[Mh] Termos MeSH primário: Bradyrhizobium/classificação
Bradyrhizobium/isolamento & purificação
Chamaecrista/microbiologia
Genótipo
Nodulação
Raízes de Plantas/microbiologia
[Mh] Termos MeSH secundário: Bradyrhizobium/genética
Brasil
Análise por Conglomerados
DNA Bacteriano/química
DNA Bacteriano/genética
DNA Ribossômico/química
DNA Ribossômico/genética
DNA Espaçador Ribossômico/química
DNA Espaçador Ribossômico/genética
Genes Essenciais
Filogenia
RNA Ribossômico 16S/genética
Análise de Sequência de DNA
Simbiose
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Bacterial); 0 (DNA, Ribosomal); 0 (DNA, Ribosomal Spacer); 0 (RNA, Ribosomal, 16S)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170403
[Lr] Data última revisão:
170403
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170118
[St] Status:MEDLINE


  9 / 559 MEDLINE  
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[PMID]:28075406
[Au] Autor:Gresshoff PM; Ferguson BJ
[Ad] Endereço:Centre for Integrative Legume Research, The University of Queensland, St Lucia, Brisbane Qld 4072, Australia. p.gresshoff@uq.edu.au.
[Ti] Título:Molecular Signals in Nodulation Control.
[So] Source:Int J Mol Sci;18(1), 2017 Jan 10.
[Is] ISSN:1422-0067
[Cp] País de publicação:Switzerland
[La] Idioma:eng
[Ab] Resumo:Our world is facing major problems relating to food production. According to an August 30, 2015 program of LANDLINE (Australian Broadcasting Corporation, Australia),we lose 120,000,000 hectares of agricultural land per year due to population growth, associated urbanisation, and desertification.
[Mh] Termos MeSH primário: Agricultura
Nodulação
[Mh] Termos MeSH secundário: Abastecimento de Alimentos
Seres Humanos
Fixação de Nitrogênio
[Pt] Tipo de publicação:EDITORIAL; INTRODUCTORY JOURNAL ARTICLE
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170418
[Lr] Data última revisão:
170418
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170112
[St] Status:MEDLINE


  10 / 559 MEDLINE  
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[PMID]:28063627
[Au] Autor:Ji ZJ; Yan H; Cui QG; Wang ET; Chen WF; Chen WX
[Ad] Endereço:College of Life Science, Inner Mongolia University for the Nationalities, Tongliao, 028042 Inner Mongolia, China; State Key Laboratory of Agrobiotechnology, Beijing 100193, China; College of Biological Sciences and Rhizobium Research Center, China Agricultural University, Beijing 100193, China.
[Ti] Título:Competition between rhizobia under different environmental conditions affects the nodulation of a legume.
[So] Source:Syst Appl Microbiol;40(2):114-119, 2017 Mar.
[Is] ISSN:1618-0984
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Mutualistic symbiosis and nitrogen fixation of legume rhizobia play a key role in ecological environments. Although many different rhizobial species can form nodules with a specific legume, there is often a dominant microsymbiont, which has the highest nodule occupancy rates, and they are often known as the "most favorable rhizobia". Shifts in the most favorable rhizobia for a legume in different geographical regions or soil types are not well understood. Therefore, in order to explore the shift model, an experiment was designed using successive inoculations of rhizobia on one legume. The plants were grown in either sterile vermiculite or a sandy soil. Results showed that, depending on the environment, a legume could select its preferential rhizobial partner in order to establish symbiosis. For perennial legumes, nodulation is a continuous and sequential process. In this study, when the most favorable rhizobial strain was available to infect the plant first, it was dominant in the nodules, regardless of the existence of other rhizobial strains in the rhizosphere. Other rhizobial strains had an opportunity to establish symbiosis with the plant when the most favorable rhizobial strain was not present in the rhizosphere. Nodule occupancy rates of the most favorable rhizobial strain depended on the competitiveness of other rhizobial strains in the rhizosphere and the environmental adaptability of the favorable rhizobial strain (in this case, to mild vermiculite or hostile sandy soil). To produce high nodulation and efficient nitrogen fixation, the most favorable rhizobial strain should be selected and inoculated into the rhizosphere of legume plants under optimum environmental conditions.
[Mh] Termos MeSH primário: Exposição Ambiental
Fabaceae/microbiologia
Fabaceae/fisiologia
Nodulação
Nódulos Radiculares de Plantas/microbiologia
Microbiologia do Solo
[Mh] Termos MeSH secundário: Fixação de Nitrogênio
Rizosfera
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170403
[Lr] Data última revisão:
170403
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170109
[St] Status:MEDLINE



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