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Pesquisa : B03.440.450.650 [Categoria DeCS]
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[PMID]:28322207
[Au] Autor:Lü AJ; Wang RX; Hu XC; Sun JF; Li L; Pei C; Zhang C; Nie GX
[Ad] Endereço:College of Fisheries, Henan Normal University, Xinxiang 453007, PR China.
[Ti] Título:First report of Rahnella aquatilis infection in crucian carp Carassius auratus in China.
[So] Source:Dis Aquat Organ;123(3):205-212, 2017 03 21.
[Is] ISSN:0177-5103
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Rahnella aquatilis infection is rare in aquaculture. Here, a Gram-negative rod-shaped bacterium was isolated from diseased crucian carp Carassius auratus in Xuzhou City, Jiangsu Province, eastern China. The isolate was tentatively named strain KCL-5, and subsequently identified as R. aquatilis by biochemical properties and molecular techniques. The results showed that the isolate KCL-5 was most closely related to the type strain ATCC33071 (= DSM4594) of R. aquatilis, which shared 99.67, 96.26 and 99.58% nucleotide sequence identities for 16S rDNA, gyrB and toxin yhaV genes, respectively. Experimental challenges were conducted which demonstrated pathogenicity of the isolate in crucian carp. Antimicrobial susceptibility testing showed that the isolated strain was susceptible to piperacillin, gentamicin, kanamycin, nalidixic acid, norfloxacin, ofloxacin, azithromycin and erythromycin. To our knowledge, this is the first report on R. aquatilis infection in crucian carp, and the first evidence of pathogenicity in fish.
[Mh] Termos MeSH primário: Doenças dos Peixes/microbiologia
Carpa Dourada
Infecções por Bactérias Gram-Negativas/veterinária
Rahnella
[Mh] Termos MeSH secundário: Animais
China/epidemiologia
Doenças dos Peixes/epidemiologia
Infecções por Bactérias Gram-Negativas/epidemiologia
Infecções por Bactérias Gram-Negativas/microbiologia
Filogenia
RNA Bacteriano/genética
RNA Ribossômico 16S/genética
Rahnella/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (RNA, Bacterial); 0 (RNA, Ribosomal, 16S)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170629
[Lr] Data última revisão:
170629
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170322
[St] Status:MEDLINE
[do] DOI:10.3354/dao03099


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[PMID]:27541158
[Au] Autor:Taktek S; St-Arnaud M; Piché Y; Fortin JA; Antoun H
[Ad] Endereço:Centre de recherche en innovation sur les végétaux and Département des sols et de génie agroalimentaire, Faculté des sciences de l'agriculture et de l'alimentation, Université Laval, 2480 Boulevard Hochelaga, Québec, QC, G1V 0A6, Canada.
[Ti] Título:Igneous phosphate rock solubilization by biofilm-forming mycorrhizobacteria and hyphobacteria associated with Rhizoglomus irregulare DAOM 197198.
[So] Source:Mycorrhiza;27(1):13-22, 2017 Jan.
[Is] ISSN:1432-1890
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Biofilm formation on abiotic and biotic surfaces was studied with two hyphobacteria, strongly attached to the surface of the arbuscular mycorrhizal fungus (AMF) Rhizoglomus irregulare (Ri) DAOM 197198 and two mycorrhizobacteria, loosely attached to the roots of different mycorrhizal plants. When the sparingly soluble igneous phosphate rock (PR) from Quebec, or when the chemical hydroxyapatite were used as sole phosphorus (P) source, hyphobacteria Rhizobium miluonense Rm3 and Burkholderia anthina Ba8 produced significantly more biofilms than mycorrhizobacteria Rahnella sp. Rs11 and Burkholderia phenazinium Bph12, as indicated by the crystal violet assay or by quantifying biofilm exopolysaccharides. As previously observed with planktonic bacteria, biofilms mobilized P by lowering the pH and releasing gluconic acid. The high efficiency of P mobilization by the hyphobacteria Ba8 was linked to the presence of more viable cells in its biofilm as revealed by the hydrolysis of fluorescein diacetate. Scanning electron microscopy micrographs showed a high adherence of the best P-solubilizer hyphobacteria Ba8 on the surface of Quebec PR. Hydroxyapatite porous structure did not allow a good adherence of Ba8. Ba8 formed an important biofilm on the hyphae of Ri DAOM 197198 with low reactive Quebec PR while no biofilm was observed with the high reactive hydroxyapatite. Results confirm the possible presence of specificity between the Ri DAOM 197198 and the hyphobacteria and suggest that the interaction would be regulated by the availability of P.
[Mh] Termos MeSH primário: Biofilmes/crescimento & desenvolvimento
Burkholderia/fisiologia
Glomeromycota/fisiologia
Micorrizas/fisiologia
Rahnella/fisiologia
Rhizobium/fisiologia
[Mh] Termos MeSH secundário: Concentração de Íons de Hidrogênio
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1702
[Cu] Atualização por classe:170222
[Lr] Data última revisão:
170222
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160820
[St] Status:MEDLINE
[do] DOI:10.1007/s00572-016-0726-z


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[PMID]:26424139
[Au] Autor:Koczura R; Mokracka J; Makowska N
[Ad] Endereço:Department of Microbiology, Faculty of Biology, Adam Mickiewicz University in Poznan, ul. Umultowska 89, 61-614, Poznan, Poland. koczma@amu.edu.pl.
[Ti] Título:Environmental Isolate of Rahnella aquatilis Harbors Class 1 Integron.
[So] Source:Curr Microbiol;72(1):64-7, 2016 Jan.
[Is] ISSN:1432-0991
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The paper presents first description of class 1 integron in an environmental strain of Rahnella aquatilis, a rarely isolated Gram-negative bacterium of the family Enterobacteriaceae. The strain was isolated from the Warta river water, Poland. Class 1 integrase gene was detected by a PCR assay. Sequencing of the integron's variable region showed the presence of a dfrA1-aadA1 gene cassette array. The integron was located in a 54-kbp plasmid that was transferable to Escherichia coli J-53 recipient strain in a conjugation assay. The integron-bearing R. aquatilis strain was resistant to aminoglycosides, penicillins, trimethoprim, sulfamethoxazole, and trimethoprim/sulfamethoxazole. This paper confirms that water environment play a major role in the spread of integrons and, consequently, antimicrobial resistance, among bacteria of various genera.
[Mh] Termos MeSH primário: Integrons
Rahnella/genética
Rahnella/isolamento & purificação
Rios/microbiologia
[Mh] Termos MeSH secundário: Antibacterianos/farmacologia
Conjugação Genética
DNA Bacteriano/genética
Farmacorresistência Bacteriana
Escherichia coli/genética
Transferência Genética Horizontal
Plasmídeos/análise
Polônia
Reação em Cadeia da Polimerase
Rahnella/efeitos dos fármacos
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Anti-Bacterial Agents); 0 (DNA, Bacterial)
[Em] Mês de entrada:1610
[Cu] Atualização por classe:170220
[Lr] Data última revisão:
170220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:151002
[St] Status:MEDLINE
[do] DOI:10.1007/s00284-015-0917-4


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[PMID]:26410540
[Au] Autor:Martins W; Carvalhaes CG; Cayô R; Gales AC; Pignatari AC
[Ad] Endereço:Laboratório Especial de Microbiologia Clínica (LEMC), Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina/Universidade Federal de São Paulo, São Paulo, SP, Brazil. Electronic address: willamesbrasileiro@hotmail.com.
[Ti] Título:Co-transmission of Rahnella aquatilis between hospitalized patients.
[So] Source:Braz J Infect Dis;19(6):648-50, 2015 Nov-Dec.
[Is] ISSN:1678-4391
[Cp] País de publicação:Brazil
[La] Idioma:eng
[Ab] Resumo:Rahnella aquatilis is an environmental Gram-negative bacillus that is rarely reported as human pathogen, being mainly associated with infections in immunocompromised patients. Herein we describe two cases of R. aquatilis isolates recovered from endotracheal aspirate cultures of different patients in a tertiary hospital located in the city of São Paulo, Brazil. Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry and 16S rDNA gene sequencing were performed to confirm bacterial identification after the isolates being erroneously identified as Pantoea spp. by automated system. Both isolates showed the same PFGE pattern and presented the ß-lactamase encoding gene blaRAHN-1, responsible for resistance to cephalothin. The isolates were susceptible to broad-spectrum cephalosporins, carbapenems, fluoroquinolones, aminoglycosides, and polymyxin B. This report shows the presence and transmission of uncommon bacteria in the nosocomial environment and alerts us about the need for new tools of correct microbiologic diagnosis.
[Mh] Termos MeSH primário: Infecção Hospitalar/microbiologia
Infecções por Bactérias Gram-Positivas/microbiologia
Rahnella/isolamento & purificação
[Mh] Termos MeSH secundário: Adulto
Antibacterianos/farmacologia
Infecção Hospitalar/transmissão
Infecções por Bactérias Gram-Positivas/transmissão
Seres Humanos
Masculino
Testes de Sensibilidade Microbiana
Meia-Idade
Rahnella/efeitos dos fármacos
[Pt] Tipo de publicação:CASE REPORTS; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Anti-Bacterial Agents)
[Em] Mês de entrada:1605
[Cu] Atualização por classe:151215
[Lr] Data última revisão:
151215
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150928
[St] Status:MEDLINE


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[PMID]:26238172
[Au] Autor:Wei F; Ma T; Gong X; Zhang N; Bao B
[Ad] Endereço:The Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Shanghai Ocean University, Ministry of Education, Shanghai 201306, China.
[Ti] Título:Identification of tetrodotoxin-producing bacteria from goby Yongeichthys criniger.
[So] Source:Toxicon;104:46-51, 2015 Sep 15.
[Is] ISSN:1879-3150
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Toxic goby fish (Yongeichthys criniger) containing tetrodotoxin (TTX), from Zhanjiang, Guangdong province, China, were screened for TTX-producing bacteria. Two toxic bacterial strains were isolated from the liver of Y. criniger and respectively denoted XC3-3 and XL-1. TTX production by the strains was confirmed by mouse bioassay, enzyme-linked immunosorbent assay and high performance liquid chromatography coupled with mass spectrometry. Based on morphological, physiological and biochemical characteristics and 16S rDNA phylogenetic analysis, strain XC3-3 was identified as Enterobacter cloaca and XL-1 was closely related to Rahnella aquatilis. These findings show for the first time that TTX-producing bacteria are symbiotic bacteria in goby and suggest that bacterial strains are at least partially responsible for TTX accumulation in Y. criniger.
[Mh] Termos MeSH primário: Enterobacter cloacae/isolamento & purificação
Peixes/microbiologia
Tetrodotoxina/biossíntese
[Mh] Termos MeSH secundário: Animais
China
Cromatografia Líquida de Alta Pressão
Ensaio de Imunoadsorção Enzimática
Fígado/microbiologia
Camundongos
Filogenia
Rahnella/isolamento & purificação
Simbiose
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
4368-28-9 (Tetrodotoxin)
[Em] Mês de entrada:1607
[Cu] Atualização por classe:150908
[Lr] Data última revisão:
150908
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150805
[St] Status:MEDLINE


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[PMID]:26145832
[Au] Autor:Fan Y; Hua X; Zhang Y; Feng Y; Shen Q; Dong J; Zhao W; Zhang W; Jin Z; Yang R
[Ad] Endereço:State Key Laboratory of Food Science and Technology, Jiangnan University, 214122 Wuxi, China; School of Food Science and Technology, Jiangnan University, 214122 Wuxi, China. Electronic address: yilin58299@163.com.
[Ti] Título:Cloning, expression and structural stability of a cold-adapted ß-galactosidase from Rahnella sp. R3.
[So] Source:Protein Expr Purif;115:158-64, 2015 Nov.
[Is] ISSN:1096-0279
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:A novel gene was isolated for the first time from a psychrophilic gram-negative bacterium Rahnella sp. R3. The gene encoded a cold-adapted ß-galactosidase (R-ß-Gal). Recombinant R-ß-Gal was expressed in Escherichia coli BL21 (DE3), purified and characterized. R-ß-gal belongs to the glycosyl hydrolase family 42. Circular dichroism spectrometry of the structural stability of R-ß-Gal with respect to temperature indicated that the secondary structures of the enzyme were stable to 45°C. In solution, the enzyme was a homo-trimer and was active at temperatures as low as 4°C. The enzyme did not require the presence of metal ions to be active, but Mg(2+), Mn(2+), and Ca(2+) enhanced its activity slightly, whereas Fe(3+), Zn(2+) and Al(3+) appeared to inactive it. The purified enzyme displayed K(m) values of 6.5 mM for ONPG and 2.2mM for lactose at 4°C. These values were lower than the corresponding K(m)s reported for other cold-adapted ß-Gals.
[Mh] Termos MeSH primário: Rahnella/enzimologia
Proteínas Recombinantes/química
Proteínas Recombinantes/metabolismo
beta-Galactosidase/química
beta-Galactosidase/metabolismo
[Mh] Termos MeSH secundário: Clonagem Molecular
Temperatura Baixa
Estabilidade Enzimática
Escherichia coli/genética
Concentração de Íons de Hidrogênio
Cinética
Metais Pesados
Rahnella/genética
Proteínas Recombinantes/genética
Proteínas Recombinantes/isolamento & purificação
beta-Galactosidase/genética
beta-Galactosidase/isolamento & purificação
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Metals, Heavy); 0 (Recombinant Proteins); EC 3.2.1.23 (beta-Galactosidase)
[Em] Mês de entrada:1606
[Cu] Atualização por classe:150919
[Lr] Data última revisão:
150919
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150707
[St] Status:MEDLINE


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[PMID]:26070691
[Au] Autor:Smulek W; Zdarta A; Guzik U; Dudzinska-Bajorek B; Kaczorek E
[Ad] Endereço:Institute of Chemical Technology and Engineering, Poznan University of Technology, Berdychowo 4, 60-965 Poznan, Poland.
[Ti] Título:Rahnella sp. strain EK12: Cell surface properties and diesel oil biodegradation after long-term contact with natural surfactants and diesel oil.
[So] Source:Microbiol Res;176:38-47, 2015 Jul.
[Is] ISSN:1618-0623
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:The changes in cell surface properties of Rahnella sp. strain EK12 and modifications in genetic material after long-term contact with saponins and rhamnolipids, were investigated. Rhamnolipids caused a decrease of hydrophobicity in liquid cultures compared with saponins. On the other hand, in cultures with rhamnolipids, the addition of diesel oil results in a rapid rise of cell surface hydrophobicity. The similar effect was not so significant in the presence of saponins. For the bacteria grown in the presence of saponins or rhamnolipids, but without diesel oil, the ratio of unsaturated to saturated fatty acids decreased, in comparison to the control culture. The differences observed in hydrophobicity, zeta potential and fatty acids profiles, indicated various mechanisms of an interaction between a surfactant and a bacterial cells. The results have also shown an impact of the long-term contact on changes in genetic material of Rahnella sp. strain EK12 cells. Moreover, the presence of saponins led to significant increase of diesel oil biodegradation.
[Mh] Termos MeSH primário: Parede Celular/química
Gasolina
Óleos/metabolismo
Rahnella/isolamento & purificação
Rahnella/metabolismo
Propriedades de Superfície
[Mh] Termos MeSH secundário: Biotransformação
Membrana Celular/química
Ácidos Graxos/análise
Glicolipídeos/metabolismo
Interações Hidrofóbicas e Hidrofílicas
Rahnella/crescimento & desenvolvimento
Saponinas/metabolismo
Tensoativos/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Fatty Acids); 0 (Gasoline); 0 (Glycolipids); 0 (Oils); 0 (Saponins); 0 (Surface-Active Agents); 0 (rhamnolipid)
[Em] Mês de entrada:1602
[Cu] Atualização por classe:150613
[Lr] Data última revisão:
150613
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150614
[St] Status:MEDLINE


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[PMID]:25547935
[Au] Autor:Montenegro D; Kalpana K; Chrissian C; Sharma A; Takaoka A; Iacovidou M; Soll CE; Aminova O; Heguy A; Cohen L; Shen S; Kawamura A
[Ad] Endereço:Department of Chemistry, Hunter College of CUNY, 695 Park Avenue, New York, NY 10065, USA.
[Ti] Título:Uncovering potential 'herbal probiotics' in Juzen-taiho-to through the study of associated bacterial populations.
[So] Source:Bioorg Med Chem Lett;25(3):466-9, 2015 Feb 01.
[Is] ISSN:1464-3405
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Juzen-taiho-to (JTT) is an immune-boosting formulation of ten medicinal herbs. It is used clinically in East Asia to boost the human immune functions. The active factors in JTT have not been clarified. But, existing evidence suggests that lipopolysaccharide (LPS)-like factors contribute to the activity. To examine this possibility, JTT was subjected to a series of analyses, including high resolution mass spectrometry, which suggested the presence of structural variants of LPS. This finding opened a possibility that JTT contains immune-boosting bacteria. As the first step to characterize the bacteria in JTT, 16S ribosomal RNA sequencing was carried out for Angelica sinensis (dried root), one of the most potent immunostimulatory herbs in JTT. The sequencing revealed a total of 519 bacteria genera in A. sinensis. The most abundant genus was Rahnella, which is widely distributed in water and plants. The abundance of Rahnella appeared to correlate with the immunostimulatory activity of A. sinensis. In conclusion, the current study provided new pieces of evidence supporting the emerging theory of bacterial contribution in immune-boosting herbs.
[Mh] Termos MeSH primário: Medicamentos de Ervas Chinesas/química
Probióticos/química
[Mh] Termos MeSH secundário: Adjuvantes Imunológicos/química
Adjuvantes Imunológicos/farmacologia
Angelica sinensis/metabolismo
Angelica sinensis/microbiologia
Linhagem Celular
Medicamentos de Ervas Chinesas/farmacologia
Seres Humanos
Molécula 1 de Adesão Intercelular/genética
Molécula 1 de Adesão Intercelular/metabolismo
Metagenômica
Probióticos/farmacologia
RNA Ribossômico 16S/metabolismo
Rahnella/metabolismo
Transcriptoma/efeitos dos fármacos
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, N.I.H., EXTRAMURAL; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Adjuvants, Immunologic); 0 (Drugs, Chinese Herbal); 0 (ICAM1 protein, human); 0 (RNA, Ribosomal, 16S); 0 (juzentaihoto); 126547-89-5 (Intercellular Adhesion Molecule-1)
[Em] Mês de entrada:1509
[Cu] Atualização por classe:161019
[Lr] Data última revisão:
161019
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:141231
[St] Status:MEDLINE


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[PMID]:25185494
[Au] Autor:Jebara SH; Saadani O; Fatnassi IC; Chiboub M; Abdelkrim S; Jebara M
[Ad] Endereço:Centre de Biotechnologie Borj Cedria, Laboratoire des Légumineuses, University Tunis El Manar, BP 901, 2050, Hammam Lif, Tunisie, jebarasalwa@yahoo.fr.
[Ti] Título:Inoculation of Lens culinaris with Pb-resistant bacteria shows potential for phytostabilization.
[So] Source:Environ Sci Pollut Res Int;22(4):2537-45, 2015 Feb.
[Is] ISSN:1614-7499
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Phytoremediation comprises a set of plant and microbe-based technologies for remediation of soil heavy metal contamination. In this work, four Pb-resistant bacteria (Agrobacterium tumefaciens, Rahnella aquatilis, and two Pseudomonas sp.) were selected among a collection of isolates from root nodule of Lens culinaris. They had a high degree of bioaccumulation ability in nutrient medium containing 2 mM Pb, and the maximum Pb accumulation of whole cell was found after 48-h incubation. These Pb-resistant bacteria synthesized plant growth promoting substances such as indole acetic acid and siderophore. The presence of the Pb resistance genes (pbrA) in these bacteria has been confirmed by PCR. L. culinaris cultivated in two experimental soils with different levels of contamination showed that Pb contamination affected plant growth; therefore, it's co-inoculation with the consortium of Pb-resistant bacteria improved plant biomass. The present study demonstrated that lentil accumulated Pb primarily in their roots and poorly in their shoots; in addition, it's co-inoculation in moderately Pb-contaminated soil induced a reduction in Pb accumulation in roots and shoots by 22 and 80 %, respectively. Whereas in highly Pb-contaminated soil, we registered a diminution in concentration of Pb in shoots (66 %) and an augmentation in roots (21 %). The contamination of soil by Pb caused an oxidative stress in lentil plant, inducing modulation in antioxidant enzymes activities, essentially in superoxide dismutase (SOD) and peroxidase (GPOX) activities which were more pronounced in lentil cultivated in highly Pb-contaminated soil, in addition, co-inoculation enhanced these activities, suggesting the protective role of enzymatic antioxidant against Pb-induced plant stress.Thus, the present study demonstrated that co-inoculation of lentil with A. tumefaciens, R. aquatilis, and Pseudomonas sp. formed a symbiotic system useful for phytostabilization of highly and moderately Pb-contaminated soils.
[Mh] Termos MeSH primário: Chumbo/metabolismo
Lens (Planta)/microbiologia
Nódulos Radiculares de Plantas/microbiologia
Poluentes do Solo/metabolismo
[Mh] Termos MeSH secundário: Agrobacterium tumefaciens/genética
Agrobacterium tumefaciens/metabolismo
Biodegradação Ambiental
Glutationa Peroxidase/metabolismo
Chumbo/análise
Lens (Planta)/metabolismo
Metais Pesados/análise
Estresse Oxidativo
Desenvolvimento Vegetal
Proteínas de Plantas/metabolismo
Pseudomonas/genética
Pseudomonas/metabolismo
Rahnella/genética
Rahnella/metabolismo
Nódulos Radiculares de Plantas/metabolismo
Solo/química
Microbiologia do Solo
Poluentes do Solo/análise
Superóxido Dismutase/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Metals, Heavy); 0 (Plant Proteins); 0 (Soil); 0 (Soil Pollutants); 2P299V784P (Lead); EC 1.11.1.9 (Glutathione Peroxidase); EC 1.15.1.1 (Superoxide Dismutase)
[Em] Mês de entrada:1506
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140905
[St] Status:MEDLINE
[do] DOI:10.1007/s11356-014-3510-7


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[PMID]:24740715
[Au] Autor:Jebara SH; Abdelkerim S; Fatnassi IC; Chiboub M; Saadani O; Jebara M
[Ad] Endereço:University Tunis El Manar, Centre de Biotechnologie Borj Cedria, Laboratoire des Légumineuses, Hammam Lif, Tunisie.
[Ti] Título:Identification of effective Pb resistant bacteria isolated from Lens culinaris growing in lead contaminated soils.
[So] Source:J Basic Microbiol;55(3):346-53, 2015 Mar.
[Is] ISSN:1521-4028
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Soil bacteria are a new phytoremediation system for the removal of heavy metals from soils. In this study, fifteen soil bacteria were isolated from root nodules of lentil growing in heavy metals contaminated soils, particularly by lead. Molecular characterization of the collection showed a large diversity, including Agrobacterium tumefaciens, Rahnella aquatilis, Pseudomonas, and Rhizobium sp. These soil bacteria had a wide range of tolerance to heavy metals. Among them, strains of A. tumefaciens and R. aquatilis tolerated up to 3.35 mM Pb; whereas Pseudomonas tolerated up to 3.24 mM Pb. The inoculation of lentil grown hydroponically with inoculums formed by these efficient and Pb resistant bacteria enhanced plant biomass. The treatment of this symbiosis by 1 mM Pb for 10 days or by 2 mM Pb for 3 days demonstrated that lentil had Pb accumulation capacity and can be considered a Pb accumulator plant, elsewhere, roots accumulated more Pb than shoots, and the inoculation decreased the Pb up take by the plants, suggesting that this symbiosis should be investigated for use in phytostabilization of Pb-contaminated soils. At the same time, a modulation in the antioxidant enzyme activity and a specific duration was required for the induction of the superoxide dismutase (SOD), peroxidase (POX), and ascorbate peroxidase (APX) response and to adapt to Pb stress. These results suggested that these enzymes may be involved in the main mechanism of antioxidative defense in lentil exposed to Pb oxidative stress.
[Mh] Termos MeSH primário: Bactérias/efeitos dos fármacos
Bactérias/isolamento & purificação
Chumbo/metabolismo
Chumbo/farmacologia
Lens (Planta)/microbiologia
Poluentes do Solo/metabolismo
[Mh] Termos MeSH secundário: Agrobacterium tumefaciens/isolamento & purificação
Biodegradação Ambiental
Biomassa
Cádmio/metabolismo
Farmacorresistência Bacteriana
Hidroponia
Lens (Planta)/enzimologia
Lens (Planta)/crescimento & desenvolvimento
Lens (Planta)/metabolismo
Estresse Oxidativo
Peroxidases/metabolismo
Raízes de Plantas/química
Raízes de Plantas/enzimologia
Raízes de Plantas/microbiologia
Pseudomonas/isolamento & purificação
Rahnella/isolamento & purificação
Rhizobium/isolamento & purificação
Nódulos Radiculares de Plantas/química
Nódulos Radiculares de Plantas/enzimologia
Nódulos Radiculares de Plantas/microbiologia
Solo/química
Microbiologia do Solo
Superóxido Dismutase/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Soil); 0 (Soil Pollutants); 00BH33GNGH (Cadmium); 2P299V784P (Lead); EC 1.11.1.- (Peroxidases); EC 1.15.1.1 (Superoxide Dismutase)
[Em] Mês de entrada:1511
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140418
[St] Status:MEDLINE
[do] DOI:10.1002/jobm.201300874



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