Base de dados : MEDLINE
Pesquisa : G02.111.587 [Categoria DeCS]
Referências encontradas : 634 [refinar]
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[PMID]:29335469
[Au] Autor:Aunkham A; Zahn M; Kesireddy A; Pothula KR; Schulte A; Baslé A; Kleinekathöfer U; Suginta W; van den Berg B
[Ad] Endereço:Biochemistry-Electrochemistry Research Unit, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand.
[Ti] Título:Structural basis for chitin acquisition by marine Vibrio species.
[So] Source:Nat Commun;9(1):220, 2018 01 15.
[Is] ISSN:2041-1723
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Chitin, an insoluble polymer of N-acetylglucosamine, is one of the most abundant biopolymers on Earth. By degrading chitin, chitinolytic bacteria such as Vibrio harveyi are critical for chitin recycling and maintenance of carbon and nitrogen cycles in the world's oceans. A decisive step in chitin degradation is the uptake of chito-oligosaccharides by an outer membrane protein channel named chitoporin (ChiP). Here, we report X-ray crystal structures of ChiP from V. harveyi in the presence and absence of chito-oligosaccharides. Structures without bound sugar reveal a trimeric assembly with an unprecedented closing of the transport pore by the N-terminus of a neighboring subunit. Substrate binding ejects the pore plug to open the transport channel. Together with molecular dynamics simulations, electrophysiology and in vitro transport assays our data provide an explanation for the exceptional affinity of ChiP for chito-oligosaccharides and point to an important role of the N-terminal gate in substrate transport.
[Mh] Termos MeSH primário: Carbono/metabolismo
Quitina/metabolismo
Nitrogênio/metabolismo
Vibrio/metabolismo
[Mh] Termos MeSH secundário: Acetilglucosamina/metabolismo
Proteínas da Membrana Bacteriana Externa/química
Proteínas da Membrana Bacteriana Externa/genética
Proteínas da Membrana Bacteriana Externa/metabolismo
Ciclo do Carbono
Cristalografia por Raios X
Modelos Moleculares
Ciclo do Nitrogênio
Oceanos e Mares
Oligossacarídeos/metabolismo
Porinas/química
Porinas/genética
Porinas/metabolismo
Conformação Proteica
Água do Mar/química
Água do Mar/microbiologia
Vibrio/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Bacterial Outer Membrane Proteins); 0 (Oligosaccharides); 0 (Porins); 1398-61-4 (Chitin); 7440-44-0 (Carbon); N762921K75 (Nitrogen); V956696549 (Acetylglucosamine)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180306
[Lr] Data última revisão:
180306
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180117
[St] Status:MEDLINE
[do] DOI:10.1038/s41467-017-02523-y


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[PMID]:29362437
[Au] Autor:Otero XL; De La Peña-Lastra S; Pérez-Alberti A; Ferreira TO; Huerta-Diaz MA
[Ad] Endereço:Departamento de Edafoloxía e Química Agrícola, Campus Vida, Facultade de Bioloxía, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain.
[Ti] Título:Seabird colonies as important global drivers in the nitrogen and phosphorus cycles.
[So] Source:Nat Commun;9(1):246, 2018 01 23.
[Is] ISSN:2041-1723
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Seabirds drastically transform the environmental conditions of the sites where they establish their breeding colonies via soil, sediment, and water eutrophication (hereafter termed ornitheutrophication). Here, we report worldwide amounts of total nitrogen (N) and total phosphorus (P) excreted by seabirds using an inventory of global seabird populations applied to a bioenergetics model. We estimate these fluxes to be 591 Gg N y and 99 Gg P y , respectively, with the Antarctic and Southern coasts receiving the highest N and P inputs. We show that these inputs are of similar magnitude to others considered in global N and P cycles, with concentrations per unit of surface area in seabird colonies among the highest measured on the Earth's surface. Finally, an important fraction of the total excreted N (72.5 Gg y ) and P (21.8 Gg y ) can be readily solubilized, increasing their short-term bioavailability in continental and coastal waters located near the seabird colonies.
[Mh] Termos MeSH primário: Aves/fisiologia
Ecossistema
Nitrogênio/metabolismo
Fósforo/metabolismo
[Mh] Termos MeSH secundário: Migração Animal/fisiologia
Animais
Regiões Antárticas
Aves/classificação
Conservação dos Recursos Naturais
Água Doce
Geografia
Ciclo do Nitrogênio
Oceanos e Mares
Água do Mar
Especificidade da Espécie
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
27YLU75U4W (Phosphorus); N762921K75 (Nitrogen)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180305
[Lr] Data última revisão:
180305
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180125
[St] Status:MEDLINE
[do] DOI:10.1038/s41467-017-02446-8


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[PMID]:29478650
[Au] Autor:Dong W; Guo J; Xu L; Song Z; Zhang J; Tang A; Zhang X; Leng C; Liu Y; Wang L; Wang L; Yu Y; Yang Z; Yu Y; Meng Y; Lai Y
[Ad] Endereço:Heilongjiang Academy of Agricultural Sciences Postdoctoral Programme, Harbin 150086, China; Cultivation and Farming Research Institute, Heilongjiang Academy of Agricultural Sciences, Harbin 150086, China; Northern Japonica Rice Molecular Breeding Joint Research Center, Chinese Academy of Sciences, H
[Ti] Título:Water regime-nitrogen fertilizer incorporation interaction: Field study on methane and nitrous oxide emissions from a rice agroecosystem in Harbin, China.
[So] Source:J Environ Sci (China);64:289-297, 2018 Feb.
[Is] ISSN:1001-0742
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Water regime and nitrogen (N) fertilizer are two important factors impacting greenhouse gases (GHG) emission from paddy field, whereas their effects have not been well studied in cold region. In this study, we conducted a two-year field experiment to study the impacts of water regime and N fertilizer on rice yields and GHG emissions in Harbin, China, a cold region located in high latitudes. Our results showed that intermittent irrigation significantly decreased methane (CH ) emission compared with continuous flooding, however, the decrement was far lower than the global average level. The N O emissions were very small when flooded but peaked at the beginning of the disappearance of floodwater. The N fertilizer treatments increased CH emissions at low level (75kgN/ha). But both CH and N O emissions were uninfluenced at the levels of 150kgN/ha and 225kgN/ha. Rice yields increased under intermittent irrigation and were highest at the level of 150kgN/ha. From our results, we recommended that the intermittent irrigation and 150kgN/ha as the ideal water regime-nitrogen fertilizer incorporation for this area to achieve low GHG emissions without impacting rice yields.
[Mh] Termos MeSH primário: Agricultura
Poluentes Atmosféricos/análise
Ecossistema
Fertilizantes/análise
Água Doce/química
Óxido Nitroso/análise
[Mh] Termos MeSH secundário: Poluentes Atmosféricos/química
China
Ciclo do Nitrogênio
Óxido Nitroso/química
Oryza
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Air Pollutants); 0 (Fertilizers); K50XQU1029 (Nitrous Oxide)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180301
[Lr] Data última revisão:
180301
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180227
[St] Status:MEDLINE


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[PMID]:29360853
[Au] Autor:Yuan X; Si Y; Lin W; Yang J; Wang Z; Zhang Q; Qian W; Chen Y; Yang Y
[Ad] Endereço:Key Laboratory for Subtropical Mountain Ecology, School of Geographical Science, Fujian Normal University, Fuzhou, China.
[Ti] Título:Effects of short-term warming and nitrogen addition on the quantity and quality of dissolved organic matter in a subtropical Cunninghamia lanceolata plantation.
[So] Source:PLoS One;13(1):e0191403, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Increasing temperature and nitrogen (N) deposition are two large-scale changes projected to occur over the coming decades. The effects of these changes on dissolved organic matter (DOM) are largely unknown. This study aimed to assess the effects of warming and N addition on the quantity and quality of DOM from a subtropical Cunninghamia lanceolata plantation. Between 2014 and 2016, soil solutions were collected from 0-15, 15-30, and 30-60 cm depths by using a negative pressure sampling method. The quantity and quality of DOM were measured under six different treatments. The spectra showed that the DOM of the forest soil solution mainly consisted of aromatic protein-like components, microbial degradation products, and negligible amounts of humic-like substances. Warming, N addition, and warming + N addition significantly inhibited the concentration of dissolved organic carbon (DOC) in the surface (0-15 cm) soil solution. Our results suggested that warming reduced the amount of DOM originating from microbes. The decrease in protein and carboxylic acid contents was mostly attributed to the reduction of DOC following N addition. The warming + N addition treatment showed an interactive effect rather than an additive effect. Thus, short-term warming and warming + N addition decreased the quantity of DOM and facilitated the migration of nutrients to deeper soils. Further, N addition increased the complexity of the DOM structure. Hence, the loss of soil nutrients and the rational application of N need to be considered in order to prevent the accumulation of N compounds in soil.
[Mh] Termos MeSH primário: Cunninghamia/metabolismo
Nitrogênio/metabolismo
[Mh] Termos MeSH secundário: Ciclo do Carbono
China
Cunninghamia/efeitos dos fármacos
Ecossistema
Aquecimento Global
Imagem Tridimensional
Modelos Biológicos
Nitrogênio/administração & dosagem
Nitrogênio/análise
Ciclo do Nitrogênio
Compostos Orgânicos/metabolismo
Solo/química
Solubilidade
Espectrometria de Fluorescência
Temperatura Ambiente
Clima Tropical
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Organic Chemicals); 0 (Soil); N762921K75 (Nitrogen)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180227
[Lr] Data última revisão:
180227
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180124
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0191403


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[PMID]:28700590
[Au] Autor:Piccini I; Arnieri F; Caprio E; Nervo B; Pelissetti S; Palestrini C; Roslin T; Rolando A
[Ad] Endereço:Department of Life Science and Systems Biology, University of Turin, Turin, Italy.
[Ti] Título:Greenhouse gas emissions from dung pats vary with dung beetle species and with assemblage composition.
[So] Source:PLoS One;12(7):e0178077, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Cattle farming is a major source of greenhouse gases (GHGs). Recent research suggests that GHG fluxes from dung pats could be affected by biotic interactions involving dung beetles. Whether and how these effects vary among beetle species and with assemblage composition is yet to be established. To examine the link between GHGs and different dung beetle species assemblages, we used a closed chamber system to measure fluxes of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) from cattle dung pats. Targeting a total of four dung beetle species (a pat-dwelling species, a roller of dung balls, a large and a small tunnelling species), we ran six experimental treatments (four monospecific and two mixed) and two controls (one with dung but without beetles, and one with neither dung nor beetles). In this setting, the overall presence of beetles significantly affected the gas fluxes, but different species contributed unequally to GHG emissions. When compared to the control with dung, we detected an overall reduction in the total cumulative CO2 flux from all treatments with beetles and a reduction in N2O flux from the treatments with the three most abundant dung beetle species. These reductions can be seen as beneficial ecosystem services. Nonetheless, we also observed a disservice provided by the large tunneler, Copris lunaris, which significantly increased the CH4 flux-an effect potentially traceable to the species' nesting strategy involving the construction of large brood balls. When fluxes were summed into CO2-equivalents across individual GHG compounds, dung with beetles proved to emit less GHGs than did beetle-free dung, with the mix of the three most abundant species providing the highest reduction (-32%). As the mix of multiple species proved the most effective in reducing CO2-equivalents, the conservation of diverse assemblages of dung beetles emerges as a priority in agro-pastoral ecosystems.
[Mh] Termos MeSH primário: Ciclo do Carbono
Coleópteros/fisiologia
Efeito Estufa
Esterco
Ciclo do Nitrogênio
[Mh] Termos MeSH secundário: Animais
Dióxido de Carbono/análise
Coleópteros/classificação
Coleópteros/metabolismo
Metano/análise
Óxido Nitroso/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Manure); 142M471B3J (Carbon Dioxide); K50XQU1029 (Nitrous Oxide); OP0UW79H66 (Methane)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170713
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0178077


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[PMID]:28686660
[Au] Autor:Mao B; Mao R; Zeng DH
[Ad] Endereço:Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China.
[Ti] Título:Species diversity and chemical properties of litter influence non-additive effects of litter mixtures on soil carbon and nitrogen cycling.
[So] Source:PLoS One;12(7):e0180422, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Decomposition of litter mixtures generally cannot be predicted from the component species incubated in isolation. Therefore, such non-additive effects of litter mixing on soil C and N dynamics remain poorly understood in terrestrial ecosystems. In this study, litters of Mongolian pine and three dominant understory species and soil were collected from a Mongolian pine plantation in Northeast China. In order to examine the effects of mixed-species litter on soil microbial biomass N, soil net N mineralization and soil respiration, four single litter species and their mixtures consisting of all possible 2-, 3- and 4-species combinations were added to soils, respectively. In most instances, species mixing produced synergistic non-additive effects on soil microbial biomass N and soil respiration, but antagonistic non-additive effects on net N mineralization. Species composition rather than species richness explained the non-additive effects of species mixing on soil microbial biomass N and net N mineralization, due to the interspecific differences in litter chemical composition. Both litter species composition and richness explained non-additive soil respiration responses to mixed-species litter, while litter chemical diversity and chemical composition did not. Our study indicated that litter mixtures promoted soil microbial biomass N and soil respiration, and inhibited net N mineralization. Soil N related processes rather than soil respiration were partly explained by litter chemical composition and chemical diversity, highlighting the importance of functional diversity of litter on soil N cycling.
[Mh] Termos MeSH primário: Carbono/metabolismo
Ecossistema
Ciclo do Nitrogênio
Microbiologia do Solo
[Mh] Termos MeSH secundário: Biomassa
Nitrogênio/química
Nitrogênio/metabolismo
Pinus/microbiologia
Pinus/fisiologia
Solo/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Soil); 7440-44-0 (Carbon); N762921K75 (Nitrogen)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170708
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0180422


  7 / 634 MEDLINE  
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[PMID]:28651315
[Au] Autor:Zhang M; Bai SH; Tang L; Zhang Y; Teng Y; Xu Z
[Ad] Endereço:Environmental Futures Research Institute, School of Natural Sciences, Griffith University, Brisbane, Queensland, 4111, Australia; Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China. Electronic address: manyunzh
[Ti] Título:Linking potential nitrification rates, nitrogen cycling genes and soil properties after remediating the agricultural soil contaminated with heavy metal and fungicide.
[So] Source:Chemosphere;184:892-899, 2017 Oct.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Apart from the contaminant removal, the remediation of agricultural soil should also pay more attention to soil nutrient retention and biogeochemical cycling. This study aimed to evaluate changes of soil properties, potential nitrification rates (PNRs), and functional gene abundances and link their relationships after remediating co-contaminated agricultural soil with Medicago sativa L. (alfalfa) planting, alone or together with biochar application. Compared with the control (CK), alfalfa planting, alone or together with biochar application, could significantly increase soil organic matter (SOM) contents and discrepantly affect soil pH values. The PNRs of the amended treatments were significantly higher than that of the CK. Moreover, alfalfa plantings also enhanced the abundances of functional genes related to soil nitrification and denitrification, with the sole exception of nosZ gene. Stepwise regression analysis revealed that the PNRs were best described by the gene abundance ratios of AOB amoA/nifH and nirS gene abundances. Compared with the CK, alfalfa planting, alone or with biochar application, could restore nitrogen cycling in the co-contaminated agricultural soil and enhance the PNRs via decreasing contaminant bio-availabilities and increasing SOM contents and gene abundance ratios of AOB amoA/nifH.
[Mh] Termos MeSH primário: Agricultura
Recuperação e Remediação Ambiental
Fungicidas Industriais/química
Metais Pesados/química
Microbiologia do Solo
[Mh] Termos MeSH secundário: Bactérias/genética
Carvão Vegetal
Desnitrificação
Genes Microbianos
Nitrificação
Nitrogênio/química
Ciclo do Nitrogênio
Solo/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Fungicides, Industrial); 0 (Metals, Heavy); 0 (Soil); 0 (biochar); 16291-96-6 (Charcoal); N762921K75 (Nitrogen)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170628
[St] Status:MEDLINE


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[PMID]:28546427
[Au] Autor:Hobley L; Li B; Wood JL; Kim SH; Naidoo J; Ferreira AS; Khomutov M; Khomutov A; Stanley-Wall NR; Michael AJ
[Ad] Endereço:From the Departments of Pharmacology and.
[Ti] Título:Spermidine promotes biofilm formation by activating expression of the matrix regulator .
[So] Source:J Biol Chem;292(29):12041-12053, 2017 Jul 21.
[Is] ISSN:1083-351X
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Ubiquitous polyamine spermidine is not required for normal planktonic growth of but is essential for robust biofilm formation. However, the structural features of spermidine required for biofilm formation are unknown and so are the molecular mechanisms of spermidine-stimulated biofilm development. We report here that in a spermidine-deficient mutant, the structural analogue norspermidine, but not homospermidine, restored biofilm formation. Intracellular biosynthesis of another spermidine analogue, aminopropylcadaverine, from exogenously supplied homoagmatine also restored biofilm formation. The differential ability of C-methylated spermidine analogues to functionally replace spermidine in biofilm formation indicated that the aminopropyl moiety of spermidine is more sensitive to -methylation, which it is essential for biofilm formation, but that the length and symmetry of the molecule is not critical. Transcriptomic analysis of a spermidine-depleted mutant uncovered a nitrogen-, methionine-, and -adenosylmethionine-sufficiency response, resulting in repression of gene expression related to purine catabolism, methionine and -adenosylmethionine biosynthesis and methionine salvage, and signs of altered membrane status. Consistent with the spermidine requirement in biofilm formation, single-cell analysis of this mutant indicated reduced expression of the operons for production of the exopolysaccharide and TasA protein biofilm matrix components and SinR antagonist Deletion of or ectopic expression of in the spermidine-deficient Δ background restored biofilm formation, indicating that spermidine is required for expression of the biofilm regulator Our results indicate that spermidine functions in biofilm development by activating transcription of the biofilm matrix exopolysaccharide and TasA operons through the regulator .
[Mh] Termos MeSH primário: Bacillus subtilis/fisiologia
Proteínas de Bactérias/agonistas
Biofilmes/crescimento & desenvolvimento
Regulação Bacteriana da Expressão Gênica
Polissacarídeos Bacterianos/biossíntese
Espermidina/metabolismo
Fatores de Transcrição/agonistas
[Mh] Termos MeSH secundário: Adenosilmetionina Descarboxilase/genética
Adenosilmetionina Descarboxilase/metabolismo
Bacillus subtilis/citologia
Bacillus subtilis/genética
Bacillus subtilis/crescimento & desenvolvimento
Proteínas de Bactérias/genética
Proteínas de Bactérias/metabolismo
Cadaverina/análogos & derivados
Cadaverina/metabolismo
Deleção de Genes
Perfilação da Expressão Gênica
Metionina/metabolismo
Metilação
Ciclo do Nitrogênio
Óperon
Purinas/metabolismo
S-Adenosilmetionina/metabolismo
Análise de Célula Única
Espermidina/análogos & derivados
Fatores de Transcrição/genética
Fatores de Transcrição/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Bacterial Proteins); 0 (Polysaccharides, Bacterial); 0 (Purines); 0 (Transcription Factors); 0 (exopolysaccharide, Bacillus); 56-18-8 (norspermidine); 56-19-9 (N-(3-aminopropyl)cadaverine); 7LP2MPO46S (S-Adenosylmethionine); AE28F7PNPL (Methionine); EC 4.1.1.50 (Adenosylmethionine Decarboxylase); L90BEN6OLL (Cadaverine); U87FK77H25 (Spermidine)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170808
[Lr] Data última revisão:
170808
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170527
[St] Status:MEDLINE
[do] DOI:10.1074/jbc.M117.789644


  9 / 634 MEDLINE  
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[PMID]:28499263
[Au] Autor:Li J; Huang B; Wang Q; Li Y; Fang W; Yan D; Guo M; Cao A
[Ad] Endereço:Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China.
[Ti] Título:Effect of fumigation with chloropicrin on soil bacterial communities and genes encoding key enzymes involved in nitrogen cycling.
[So] Source:Environ Pollut;227:534-542, 2017 Aug.
[Is] ISSN:1873-6424
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Chloropicrin (CP) is a potential alternative for methyl bromide as a soil fumigant given that the use of methyl bromide has become limited. However, little is known about how fumigation with CP affects the condition of the soil microbial community. In this study, 16S rRNA amplicon sequencing and quantitative PCR were combined to investigate the effect of CP on soil bacterial community. In total, 938,922 effective reads were obtained from 18 samples and clustered into 58,662 operational taxonomic units at a similarity cut-off of 97%. Both approaches showed that the primary structure of bacterial community in soil did not significantly change at the phylum level after fumigation, but CP had a significant impact on the abundance of the bacterial microbiome that was recovered and identified. Additionally, bacterial community diversity decreased significantly, and there was a shift in the predominant populations. Staphylococcus, Actinomadura, Acinetobacter and Streptomyces significantly decreased in number or disappeared, and Bacteroides, Lachnoclostridium, Pseudoalteromonas, Colwellia, Idiomarina and Cobetia became the new predominant populations. In addition, some species associated with biodegradation, such as Sphingomonas spp. and Rhodococcus spp., significantly increased in number. The abundance of ammonia-oxidizing archaea (AOA) were significantly inhibited, yet the abundance of ammonia-oxidizing bacteria (AOB) significantly increased, and denitrification was significantly promoted. These changes in bacterial flora can considerably impact soil function and health and lead to negative effects on the environment surrounding fumigated soils, indicating the need for proactive risk management. Our study provides useful information for environmental safety assessments of CP in China.
[Mh] Termos MeSH primário: Fumigação/métodos
Hidrocarbonetos Clorados/toxicidade
Ciclo do Nitrogênio/genética
Microbiologia do Solo
[Mh] Termos MeSH secundário: Amônia/metabolismo
Archaea/metabolismo
Bactérias/metabolismo
Betaproteobacteria/genética
Biodegradação Ambiental
China
Genes Bacterianos
Nitrificação
Nitrogênio/metabolismo
Ciclo do Nitrogênio/efeitos dos fármacos
Oxirredução
Praguicidas/metabolismo
RNA Ribossômico 16S
Solo/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Hydrocarbons, Chlorinated); 0 (Pesticides); 0 (RNA, Ribosomal, 16S); 0 (Soil); 7664-41-7 (Ammonia); I4JTX7Z7U2 (chloropicrin); N762921K75 (Nitrogen)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170513
[St] Status:MEDLINE


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[PMID]:28404790
[Au] Autor:Lladó S; López-Mondéjar R; Baldrian P
[Ad] Endereço:Laboratory of Environmental Microbiology, Institute of Microbiology of the CAS, Vestec, Czech Republic.
[Ti] Título:Forest Soil Bacteria: Diversity, Involvement in Ecosystem Processes, and Response to Global Change.
[So] Source:Microbiol Mol Biol Rev;81(2), 2017 Jun.
[Is] ISSN:1098-5557
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The ecology of forest soils is an important field of research due to the role of forests as carbon sinks. Consequently, a significant amount of information has been accumulated concerning their ecology, especially for temperate and boreal forests. Although most studies have focused on fungi, forest soil bacteria also play important roles in this environment. In forest soils, bacteria inhabit multiple habitats with specific properties, including bulk soil, rhizosphere, litter, and deadwood habitats, where their communities are shaped by nutrient availability and biotic interactions. Bacteria contribute to a range of essential soil processes involved in the cycling of carbon, nitrogen, and phosphorus. They take part in the decomposition of dead plant biomass and are highly important for the decomposition of dead fungal mycelia. In rhizospheres of forest trees, bacteria interact with plant roots and mycorrhizal fungi as commensalists or mycorrhiza helpers. Bacteria also mediate multiple critical steps in the nitrogen cycle, including N fixation. Bacterial communities in forest soils respond to the effects of global change, such as climate warming, increased levels of carbon dioxide, or anthropogenic nitrogen deposition. This response, however, often reflects the specificities of each studied forest ecosystem, and it is still impossible to fully incorporate bacteria into predictive models. The understanding of bacterial ecology in forest soils has advanced dramatically in recent years, but it is still incomplete. The exact extent of the contribution of bacteria to forest ecosystem processes will be recognized only in the future, when the activities of all soil community members are studied simultaneously.
[Mh] Termos MeSH primário: Bactérias/metabolismo
Mudança Climática
Ecossistema
Florestas
Microbiologia do Solo
[Mh] Termos MeSH secundário: Biomassa
Carbono/metabolismo
Sequestro de Carbono
Fungos/metabolismo
Consórcios Microbianos
Nitrogênio/metabolismo
Ciclo do Nitrogênio
Plantas
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Nm] Nome de substância:
7440-44-0 (Carbon); N762921K75 (Nitrogen)
[Em] Mês de entrada:1705
[Cu] Atualização por classe:170628
[Lr] Data última revisão:
170628
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170414
[St] Status:MEDLINE



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