Base de dados : MEDLINE
Pesquisa : B01.650.940.800.575.912.250.859.750.300.249 [Categoria DeCS]
Referências encontradas : 721 [refinar]
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  1 / 721 MEDLINE  
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[PMID]:29236500
[Au] Autor:Liu X; Liu T; Zhang Y; Xin F; Mi S; Wen B; Gu T; Shi X; Wang F; Sun L
[Ad] Endereço:Laboratory of Biomanufacturing and Food Engineering, Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences , Beijing 100193, P.R. China.
[Ti] Título:Structural Insights into the Thermophilic Adaption Mechanism of Endo-1,4-ß-Xylanase from Caldicellulosiruptor owensensis.
[So] Source:J Agric Food Chem;66(1):187-193, 2018 Jan 10.
[Is] ISSN:1520-5118
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Xylanases (EC 3.2.1.8) are a kind of enzymes degrading xylan to xylooligosaccharides (XOS) and have been widely used in a variety of industrial applications. Among them, xylanases from thermophilic microorganisms have distinct advantages in industries that require high temperature conditions. The CoXynA gene, encoding a glycoside hydrolase (GH) family 10 xylanase, was identified from thermophilic Caldicellulosiruptor owensensis and was overexpressed in Escherichia coli. Recombinant CoXynA showed optimal activity at 90 °C with a half-life of about 1 h at 80 °C and exhibited highest activity at pH 7.0. The activity of CoXynA activity was affected by a variety of cations. CoXynA showed distinct substrate specificities for beechwood xylan and birchwood xylan. The crystal structure of CoXynA was solved and a molecular dynamics simulation of CoXynA was performed. The relatively high thermostability of CoXynA was proposed to be due to the increased overall protein rigidity resulting from the reduced length and fluctuation of Loop 7.
[Mh] Termos MeSH primário: Proteínas de Bactérias/química
Endo-1,4-beta-Xilanases/química
Endo-1,4-beta-Xilanases/metabolismo
Firmicutes/enzimologia
[Mh] Termos MeSH secundário: Proteínas de Bactérias/genética
Proteínas de Bactérias/metabolismo
Betula/química
Cristalografia por Raios X
Endo-1,4-beta-Xilanases/genética
Estabilidade Enzimática
Escherichia coli/genética
Fagus/química
Concentração de Íons de Hidrogênio
Cinética
Simulação de Dinâmica Molecular
Conformação Proteica
Proteínas Recombinantes/química
Proteínas Recombinantes/genética
Proteínas Recombinantes/metabolismo
Especificidade por Substrato
Madeira/química
Xilanos/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Bacterial Proteins); 0 (Recombinant Proteins); 0 (Xylans); EC 3.2.1.8 (Endo-1,4-beta Xylanases)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180215
[Lr] Data última revisão:
180215
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171214
[St] Status:MEDLINE
[do] DOI:10.1021/acs.jafc.7b03607


  2 / 721 MEDLINE  
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[PMID]:29236746
[Au] Autor:Zieger SL; Ammerschubert S; Polle A; Scheu S
[Ad] Endereço:University of Göttingen, J.F. Blumenbach Institute of Zoology and Anthropology, Animal Ecology, Göttingen, Germany.
[Ti] Título:Root-derived carbon and nitrogen from beech and ash trees differentially fuel soil animal food webs of deciduous forests.
[So] Source:PLoS One;12(12):e0189502, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Evidence is increasing that soil animal food webs are fueled by root-derived carbon (C) and also by root-derived nitrogen (N). Functioning as link between the above- and belowground system, trees and their species identity are important drivers structuring soil animal communities. A pulse labeling experiment using 15N and 13C was conducted by exposing beech (Fagus sylvatica) and ash (Fraxinus excelsior) seedlings to 13CO2 enriched atmosphere and tree leaves to 15N ammonium chloride solution in a plant growth chamber under controlled conditions for 72 h. C and N fluxes into the soil animal food web of beech, associated with ectomycorrhizal fungi (EMF), and ash, associated with arbuscular mycorrhizal fungi (AMF), were investigated at two sampling dates (5 and 20 days after labeling). All of the soil animal taxa studied incorporated root-derived C, while root-derived N was only incorporated into certain taxa. Tree species identity strongly affected C and N incorporation with the incorporation in the beech rhizosphere generally exceeding that in the ash rhizosphere. Incorporation differed little between 5 and 20 days after labeling indicating that both C and N are incorporated quickly into soil animals and are used for tissue formation. Our results suggest that energy and nutrient fluxes in soil food webs depend on the identity of tree species with the differences being associated with different types of mycorrhiza. Further research is needed to prove the generality of these findings and to quantify the flux of plant C and N into soil food webs of forests and other terrestrial ecosystems.
[Mh] Termos MeSH primário: Carbono/metabolismo
Fagus/metabolismo
Cadeia Alimentar
Florestas
Fraxinus/metabolismo
Nitrogênio/metabolismo
Raízes de Plantas/metabolismo
[Mh] Termos MeSH secundário: Animais
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
7440-44-0 (Carbon); N762921K75 (Nitrogen)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180104
[Lr] Data última revisão:
180104
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171214
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0189502


  3 / 721 MEDLINE  
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[PMID]:29049391
[Au] Autor:Sharma RP; Vacek Z; Vacek S; Podrázský V; Jansa V
[Ad] Endereço:Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Suchdol, Czech Republic.
[Ti] Título:Modelling individual tree height to crown base of Norway spruce (Picea abies (L.) Karst.) and European beech (Fagus sylvatica L.).
[So] Source:PLoS One;12(10):e0186394, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Height to crown base (HCB) of a tree is an important variable often included as a predictor in various forest models that serve as the fundamental tools for decision-making in forestry. We developed spatially explicit and spatially inexplicit mixed-effects HCB models using measurements from a total 19,404 trees of Norway spruce (Picea abies (L.) Karst.) and European beech (Fagus sylvatica L.) on the permanent sample plots that are located across the Czech Republic. Variables describing site quality, stand density or competition, and species mixing effects were included into the HCB model with use of dominant height (HDOM), basal area of trees larger in diameters than a subject tree (BAL- spatially inexplicit measure) or Hegyi's competition index (HCI-spatially explicit measure), and basal area proportion of a species of interest (BAPOR), respectively. The parameters describing sample plot-level random effects were included into the HCB model by applying the mixed-effects modelling approach. Among several functional forms evaluated, the logistic function was found most suited to our data. The HCB model for Norway spruce was tested against the data originated from different inventory designs, but model for European beech was tested using partitioned dataset (a part of the main dataset). The variance heteroscedasticity in the residuals was substantially reduced through inclusion of a power variance function into the HCB model. The results showed that spatially explicit model described significantly a larger part of the HCB variations [R2adj = 0.86 (spruce), 0.85 (beech)] than its spatially inexplicit counterpart [R2adj = 0.84 (spruce), 0.83 (beech)]. The HCB increased with increasing competitive interactions described by tree-centered competition measure: BAL or HCI, and species mixing effects described by BAPOR. A test of the mixed-effects HCB model with the random effects estimated using at least four trees per sample plot in the validation data confirmed that the model was precise enough for the prediction of HCB for a range of site quality, tree size, stand density, and stand structure. We therefore recommend measuring of HCB on four randomly selected trees of a species of interest on each sample plot for localizing the mixed-effects model and predicting HCB of the remaining trees on the plot. Growth simulations can be made from the data that lack the values for either crown ratio or HCB using the HCB models.
[Mh] Termos MeSH primário: Fagus/crescimento & desenvolvimento
Modelos Biológicos
Picea/crescimento & desenvolvimento
[Pt] Tipo de publicação:JOURNAL ARTICLE; VALIDATION STUDIES
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171107
[Lr] Data última revisão:
171107
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171020
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0186394


  4 / 721 MEDLINE  
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[PMID]:28934229
[Au] Autor:Thoms R; Köhler M; Gessler A; Gleixner G
[Ad] Endereço:Max Planck Institute for Biogeochemistry, Jena, Germany.
[Ti] Título:Above and below ground carbohydrate allocation differs between ash (Fraxinus excelsior L.) and beech (Fagus sylvatica L.).
[So] Source:PLoS One;12(9):e0184247, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:We investigated soluble carbohydrate transport in trees that differed in their phloem loading strategies in order to better understand the transport of photosynthetic products into the roots and the rhizosphere as this knowledge is needed to better understand the respiratory processes in the rhizosphere. We compared beech, which is suggested to use mainly passive loading of transport sugars along a concentration gradient into the phloem, with ash that uses active loading and polymer trapping of raffinose family oligosaccharides (RFOs). We pulse-labeled 20 four-year old European beech and 20 four-year old ash trees with 13CO2 and tracked the fate of the label within different plant compartments. We extracted soluble carbohydrates from leaves, bark of stems and branches, and fine roots, measured their amount and isotopic content and calculated their turnover times. In beech one part of the sucrose was rapidly transported into sink tissues without major exchange with storage pools whereas another part of sucrose was strongly exchanged with unlabeled possibly stored sucrose. In contrast the storage and allocation patterns in ash depended on the identity of the transported sugars. RFO were the most important transport sugars that had highest turnover in all shoot compartments. However, the turnover of RFOs in the roots was uncoupled from the shoot. The only significant relation between sugars in the stem base and in the roots of ash was found for the amount (r2 = 0.50; p = 0.001) and isotopic content (r2 = 0.47; p = 0.01) of sucrose. The negative relation of the amounts suggested an active transport of sucrose into the roots of ash. Sucrose concentration in the root also best explained the concentration of RFOs in the roots suggesting that RFO in the roots of ash may be resynthesized from sucrose. Our results interestingly suggest that in both tree species only sucrose directly entered the fine root system and that in ash RFOs are transported indirectly into the fine roots only. The direct transport of sucrose might be passive in beech but active in ash (sustained active up- and unloading to co-cells), which would correspond to the phloem loading strategies. Our results give first hints that the transport of carbohydrates between shoot and root is not necessarily continuous and involves passive (beech) and active (ash) transport processes, which may be controlled by the phloem unloading.
[Mh] Termos MeSH primário: Carboidratos
Fagus/metabolismo
Fraxinus/metabolismo
Folhas de Planta/metabolismo
Raízes de Plantas/metabolismo
Caules de Planta/metabolismo
[Mh] Termos MeSH secundário: Metabolismo dos Carboidratos
Dióxido de Carbono/metabolismo
Isótopos de Carbono/metabolismo
Cromatografia Líquida de Alta Pressão
Fagus/anatomia & histologia
Fraxinus/anatomia & histologia
Alemanha
Parques Recreativos
Floema/metabolismo
Especificidade da Espécie
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Carbohydrates); 0 (Carbon Isotopes); 142M471B3J (Carbon Dioxide)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171018
[Lr] Data última revisão:
171018
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170922
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0184247


  5 / 721 MEDLINE  
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[PMID]:28873454
[Au] Autor:Müller M; Seifert S; Lübbe T; Leuschner C; Finkeldey R
[Ad] Endereço:Forest Genetics and Forest Tree Breeding, Faculty for Forest Sciences and Forest Ecology, University of Goettingen, Goettingen, Lower-Saxony, Germany.
[Ti] Título:De novo transcriptome assembly and analysis of differential gene expression in response to drought in European beech.
[So] Source:PLoS One;12(9):e0184167, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Despite the ecological and economic importance of European beech (Fagus sylvatica L.) genomic resources of this species are still limited. This hampers an understanding of the molecular basis of adaptation to stress. Since beech will most likely be threatened by the consequences of climate change, an understanding of adaptive processes to climate change-related drought stress is of major importance. Here, we used RNA-seq to provide the first drought stress-related transcriptome of beech. In a drought stress trial with beech saplings, 50 samples were taken for RNA extraction at five points in time during a soil desiccation experiment. De novo transcriptome assembly and analysis of differential gene expression revealed 44,335 contigs, and 662 differentially expressed genes between the stress and normally watered control group. Gene expression was specific to the different time points, and only five genes were significantly differentially expressed between the stress and control group on all five sampling days. GO term enrichment showed that mostly genes involved in lipid- and homeostasis-related processes were upregulated, whereas genes involved in oxidative stress response were downregulated in the stressed seedlings. This study gives first insights into the genomic drought stress response of European beech, and provides new genetic resources for adaptation research in this species.
[Mh] Termos MeSH primário: Secas
Fagus/genética
Fagus/fisiologia
Perfilação da Expressão Gênica
Regulação da Expressão Gênica de Plantas
Transcriptoma/genética
[Mh] Termos MeSH secundário: Ontologia Genética
Genótipo
Repetições de Microssatélites/genética
Anotação de Sequência Molecular
Estômatos de Plantas/fisiologia
RNA Mensageiro/genética
RNA Mensageiro/metabolismo
Reação em Cadeia da Polimerase em Tempo Real
Análise de Sequência de RNA
Estresse Fisiológico/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (RNA, Messenger)
[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:170906
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0184167


  6 / 721 MEDLINE  
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[PMID]:28707253
[Au] Autor:Deljouei A; Abdi E; Marcantonio M; Majnounian B; Amici V; Sohrabi H
[Ad] Endereço:Department of Forestry and Forest Economics, University of Tehran, Tehran, Iran. a.deljooei@ut.ac.ir.
[Ti] Título:The impact of forest roads on understory plant diversity in temperate hornbeam-beech forests of Northern Iran.
[So] Source:Environ Monit Assess;189(8):392, 2017 Aug.
[Is] ISSN:1573-2959
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Forest roads alter the biotic and abiotic components of ecosystems, modifying temperature, humidity, wind speed, and light availability that, in turn, cause changes in plant community composition and diversity. We aim at investigating and comparing the diversity of herbaceous species along main and secondary forest roads in a temperate-managed hornbeam-beech forest, north of Iran. Sixteen transects along main and secondary forest roads were established (eight transects along main roads and eight along secondary roads). To eliminate the effect of forest type, all transects were located in Carpinetum-Fagetum forests, the dominant forest type in the study area. The total length of each transect was 200 m (100 m toward up slope and 100 m toward down slope), and plots were established along it at different distances from road edge. The diversity of herbaceous plant species was calculated in each plot using Shannon-Wiener index, species richness, and Pielou's index. The results showed that diversity index decreased when distance from road edge increases. This decreasing trend continued up to 60 m from forest road margin, and after this threshold, the index slightly increased. Depending on the type of road (main or secondary) as well as cut or fill slopes, the area showing a statistical different plant composition and diversity measured through Shannon-Wiener, species richness, and Pielou's index is up to 10 m. The length depth of the road edge effect found in main and secondary forest roads was small, but it could have cumulative effects on forest microclimate and forest-associated biota at the island scale. Forest managers should account for the effect of road buildings on plant communities.
[Mh] Termos MeSH primário: Biodiversidade
Plantas/classificação
[Mh] Termos MeSH secundário: Betulaceae
Ecossistema
Monitoramento Ambiental
Fagus
Florestas
Geografia
Irã (Geográfico)
Solo
Árvores
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Soil)
[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:170715
[St] Status:MEDLINE
[do] DOI:10.1007/s10661-017-6105-1


  7 / 721 MEDLINE  
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[PMID]:28400170
[Au] Autor:Brethauer S; Robert Lawrence S; Michael Hans-Peter S
[Ad] Endereço:Bern University of Applied Sciences, School of Agricultural, Forest and Food Sciences, Länggasse 85, CH-3052 Zollikofen, Switzerland.
[Ti] Título:Enhanced simultaneous saccharification and fermentation of pretreated beech wood by in situ treatment with the white rot fungus Irpex lacteus in a membrane aerated biofilm reactor.
[So] Source:Bioresour Technol;237:135-138, 2017 Aug.
[Is] ISSN:1873-2976
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The aim of the present study was to investigate the combination of steam pretreatment and biological treatment with lignin degrading fungal strains in order to enable efficient bioprocessing of beech wood to ethanol. In a sequential process of steam and fungal pretreatment followed by enzymatic hydrolysis, Irpex lacteus almost doubled the glucose yield for mildly pretreated beech wood, but could not improve yields for more severely pretreated substrates. However, when simultaneous saccharification and fermentation is combined with in situ I. lacteus treatment, which is enabled by the application of a membrane aerated biofilm reactor, ethanol yields of optimally steam pretreated beech could be improved from 65 to 80%. Generally, in situ fungal treatment during bioprocessing of lignocellulose is an interesting method to harness the versatile abilities of white rot fungi.
[Mh] Termos MeSH primário: Biofilmes
Fagus
Fermentação
[Mh] Termos MeSH secundário: Etanol
Fungos
Hidrólise
Lignina
Madeira
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
3K9958V90M (Ethanol); 9005-53-2 (Lignin)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171023
[Lr] Data última revisão:
171023
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170413
[St] Status:MEDLINE


  8 / 721 MEDLINE  
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[PMID]:28193421
[Au] Autor:Siger A; Dwiecki K; Borzyszkowski W; Turski M; Rudzinska M; Nogala-Kalucka M
[Ad] Endereço:Department of Biochemistry and Food Analysis, Poznan University of Life Sciences, Wojska Polskiego 28, 60-637 Poznan, Poland. Electronic address: aleksander.siger@op.pl.
[Ti] Título:Physicochemical characteristics of the cold-pressed oil obtained from seeds of Fagus sylvatica L.
[So] Source:Food Chem;225:239-245, 2017 Jun 15.
[Is] ISSN:0308-8146
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A physicochemical characteristic of the cold-pressed oil obtained from seeds of common beech (Fagus sylvatica L.) has been presented. This plant may be considered as unconventional oilseeds crops because of relatively high content of fat (27.25%). The analyzed beech seeds oil has been classified as oleic-linoleic acids oil with more than 76% percentage share of those species. Beech seeds oil contains 4.2% of gamma-linolenic acid (GLA). Unique characteristic is the high content of γ-tocopherol (75.4mg/100g) and δ-tocopherol (34.05mg/100g). γ-Tocopherol is effective scavengers of reactive nitrogen species and prevents DNA bases nitration, what makes beech seeds oil interesting raw material in the production of cosmetics. Additionally the content of carotenoids, very effective photooxidation inhibitors, is at high level in comparison with other cold-pressed oils. It was demonstrated that PCA analysis may help to determine the authenticity of oil obtained from beech seeds.
[Mh] Termos MeSH primário: Fagus/química
Óleos Vegetais/química
Sementes/química
[Mh] Termos MeSH secundário: Fenômenos Químicos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Plant Oils)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170420
[Lr] Data última revisão:
170420
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170215
[St] Status:MEDLINE


  9 / 721 MEDLINE  
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[PMID]:28187341
[Au] Autor:Miazek K; Remacle C; Richel A; Goffin D
[Ad] Endereço:TERRA, AgricultureIsLife Platform, University of Liege-Gembloux Agro-Bio Tech, Passage des Déportés 2, Gembloux B-5030, Belgium; Unit of Biological and Industrial Chemistry, University of Liege-Gembloux Agro-Bio Tech, Passage des Déportés 2, Gembloux B-5030, Belgium. Electronic address: kmiazek@ulg.
[Ti] Título:Beech wood Fagus sylvatica dilute-acid hydrolysate as a feedstock to support Chlorella sorokiniana biomass, fatty acid and pigment production.
[So] Source:Bioresour Technol;230:122-131, 2017 Apr.
[Is] ISSN:1873-2976
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:This work evaluates the possibility of using beech wood (Fagus sylvatica) dilute-acid (H SO ) hydrolysate as a feedstock for Chlorella sorokiniana growth, fatty acid and pigment production. Neutralized wood acid hydrolysate, containing organic and mineral compounds, was tested on Chlorella growth at different concentrations and compared to growth under phototrophic conditions. Chlorella growth was improved at lower loadings and inhibited at higher loadings. Based on these results, a 12% neutralized wood acid hydrolysate (Hyd12%) loading was selected to investigate its impact on Chlorella growth, fatty acid and pigment production. Hyd12% improved microalgal biomass, fatty acid and pigment productivities both in light and in dark, when compared to photoautotrophic control. Light intensity had substantial influence on fatty acid and pigment composition in Chlorella culture during Hyd12%-based growth. Moreover, heterotrophic Chlorella cultivation with Hyd12% also showed that wood hydrolysate can constitute an attractive feedstock for microalgae cultivation in case of lack of light.
[Mh] Termos MeSH primário: Biomassa
Chlorella/metabolismo
Fagus/química
Ácidos Graxos/biossíntese
Pigmentos Biológicos/biossíntese
Ácidos Sulfúricos/farmacologia
Madeira/química
[Mh] Termos MeSH secundário: Biocombustíveis
Carbono/farmacologia
Chlorella/efeitos dos fármacos
Chlorella/crescimento & desenvolvimento
Fagus/efeitos dos fármacos
Processos Heterotróficos/efeitos dos fármacos
Hidrólise
Microalgas/efeitos dos fármacos
Microalgas/crescimento & desenvolvimento
Microalgas/metabolismo
Compostos Orgânicos/farmacologia
Madeira/efeitos dos fármacos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Biofuels); 0 (Fatty Acids); 0 (Organic Chemicals); 0 (Pigments, Biological); 0 (Sulfuric Acids); 7440-44-0 (Carbon); O40UQP6WCF (sulfuric acid)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170424
[Lr] Data última revisão:
170424
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170211
[St] Status:MEDLINE


  10 / 721 MEDLINE  
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[PMID]:28162800
[Au] Autor:Kinose Y; Fukamachi Y; Okabe S; Hiroshima H; Watanabe M; Izuta T
[Ad] Endereço:United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan.
[Ti] Título:Photosynthetic responses to ozone of upper and lower canopy leaves of Fagus crenata Blume seedlings grown under different soil nutrient conditions.
[So] Source:Environ Pollut;223:213-222, 2017 Apr.
[Is] ISSN:1873-6424
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:We aimed to clarify the effects of ozone (O ) on photosynthetic ability of upper and lower canopy leaves of Fagus crenata Blume seedlings grown under different soil nutrient conditions. To accomplish this objective, we analyzed the response of photosynthetic parameters such as maximum carboxylation rate (V ) to cumulative stomatal O uptake (ΣF ) and reduction rate of V per unit ΣF as an index of detoxification capacity for O . The seedlings of Fagus crenata were grown for two growing seasons (2014-2015) in nine treatments comprised of a combination of three levels of gas treatments (charcoal-filtered air or 1.0- or 1.5-times ambient O concentration) and three levels of soil nutrient treatments (non-fertilized or a supply of relatively low or high concentrations of compound fertilizer). The nutrient supply significantly increased the degree of O -induced reduction in V in September. However, nutrient supply did not significantly increase ΣF and reduce the detoxification capacity for O . On the other hand, the degree of O -induced reduction in V of upper canopy leaves was higher as compared with that of lower canopy leaves in August due to the higher ΣF . However, the reduction rate of V per unit ΣF in lower canopy leaves was higher than that in upper canopy leaves, indicating lower detoxification capacity for O in lower canopy leaves. Reduction rate of V per unit ΣF over the threshold, which is assumed to be proportional to gross photosynthetic rate, was similar between upper and lower canopy leaves. Therefore, capacity of photosynthetic CO assimilation is likely to be associated with detoxification capacity for O in upper and lower canopy leaves of F. crenata seedlings grown under different soil nutrient conditions.
[Mh] Termos MeSH primário: Fagus/fisiologia
Ozônio/metabolismo
Fotossíntese
Folhas de Planta/fisiologia
Plântulas/fisiologia
Solo/química
[Mh] Termos MeSH secundário: Aclimatação/fisiologia
Respiração Celular
Fagus/efeitos dos fármacos
Fagus/crescimento & desenvolvimento
Japão
Ozônio/farmacologia
Fotossíntese/efeitos dos fármacos
Folhas de Planta/efeitos dos fármacos
Folhas de Planta/crescimento & desenvolvimento
Estações do Ano
Plântulas/efeitos dos fármacos
Plântulas/crescimento & desenvolvimento
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Soil); 66H7ZZK23N (Ozone)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170207
[St] Status:MEDLINE



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