Base de dados : MEDLINE
Pesquisa : B01.650.940.800.575.912.250.822.463 [Categoria DeCS]
Referências encontradas : 28 [refinar]
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  1 / 28 MEDLINE  
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[PMID]:26707185
[Au] Autor:Obeidy C; Bravin MN; Bouchardon JL; Conord C; Moutte J; Guy B; Faure O
[Ad] Endereço:Ecole Nationale Supérieure des Mines de Saint-Etienne, Département SPIN, Laboratoire GéoSciences & Environnement, 158 cours Fauriel, F-42023 Saint Etienne Cedex 2, France.
[Ti] Título:Plants increase arsenic in solution but decrease the non-specifically bound fraction in the rhizosphere of an alkaline, naturally rich soil.
[So] Source:Ecotoxicol Environ Saf;126:23-29, 2016 Apr.
[Is] ISSN:1090-2414
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:We aimed at determining the major physical-chemical processes that drive arsenic (As) dynamic in the rhizosphere of four species (Holcus lanatus, Dittrichia viscosa, Lotus corniculatus, Plantago lanceolata) tested for phytostabilization. Experiments were performed with an alkaline soil naturally rich in As. Composition of the soil solution of planted and unplanted pots was monitored every 15 days for 90 days, with a focus on the evolution of As concentrations in solution and in the non-specifically bound (i.e. easily exchangeable) fraction. The four species similarly increased As concentration in solution, but decreased As concentration in the non-specifically bound fraction. The major part (60%) of As desorbed from the non-specifically bound fraction in planted pots was likely redistributed on the less available fractions of As on the solid phase. A second part (35%) of desorbed As was taken up by plants. The minor part (5%) of desorbed As supplied As increase in solution. To conclude, plants induced a substantial redistribution of As on the less available fractions in the rhizosphere, as expected in phytostabilization strategies. Plants however concomitantly increased As concentration in the rhizosphere solution which may contribute to As transfer through plant uptake and leaching.
[Mh] Termos MeSH primário: Arsênico/análise
Plantas/metabolismo
Rizosfera
Poluentes do Solo/análise
Solo/química
[Mh] Termos MeSH secundário: Arsênico/farmacocinética
Asteraceae/metabolismo
Holcus/metabolismo
Concentração de Íons de Hidrogênio
Loteae/metabolismo
Plantago/metabolismo
Poluentes do Solo/farmacocinética
Soluções/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Soil); 0 (Soil Pollutants); 0 (Solutions); N712M78A8G (Arsenic)
[Em] Mês de entrada:1610
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:151229
[St] Status:MEDLINE


  2 / 28 MEDLINE  
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[PMID]:26619047
[Au] Autor:Balseiro-Romero M; Kidd PS; Monterroso C
[Ad] Endereço:Department of Soil Science and Agricultural Chemistry, University of Santiago de Compostela, Campus Vida, 15782 Santiago de Compostela, Spain. Electronic address: maria.balseiro@usc.es.
[Ti] Título:Leachability of volatile fuel compounds from contaminated soils and the effect of plant exudates: A comparison of column and batch leaching tests.
[So] Source:J Hazard Mater;304:481-9, 2016 Mar 05.
[Is] ISSN:1873-3336
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Volatile fuel compounds such as fuel oxygenates (FO) (MTBE and ETBE) and BTEX (benzene, toluene, ethylbenzene and xylene) are some of the most soluble components of fuel. Characterizing the leaching potential of these compounds is essential for predicting their mobility through the soil profile and assessing the risk of groundwater contamination. Plant root exudates can play an important role in the modification of contaminant mobility in soil-plant systems, and such effects should also be considered in leaching studies. Artificially spiked samples of A and B horizons from an alumi-umbric Cambisol were leached in packed-columns and batch experiments using Milli-Q water and plant root exudates as leaching agents. The leaching potential and rate were strongly influenced by soil-contaminant interactions and by the presence of root exudates. Organic matter in A horizon preferably sorbed the most non-polar contaminants, lowering their leaching potential, and this effect was enhanced by the presence of root exudates. On the other hand, the inorganic components of the B horizon, showed a greater affinity for polar molecules, and the presence of root exudates enhanced the desorption of the contaminants. Column experiments resulted in a more realistic protocol than batch tests for predicting the leaching potential of volatile organic compounds in dissimilar soils.
[Mh] Termos MeSH primário: Derivados de Benzeno/química
Etil-Éteres/química
Éteres Metílicos/química
Exsudatos de Plantas/química
Poluentes do Solo/química
[Mh] Termos MeSH secundário: Adsorção
Holcus
Solo/química
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Benzene Derivatives); 0 (Ethyl Ethers); 0 (Methyl Ethers); 0 (Plant Exudates); 0 (Soil); 0 (Soil Pollutants); 29I4YB3S89 (methyl tert-butyl ether); 3R9B16WR19 (ethyl tert-butyl ether)
[Em] Mês de entrada:1609
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:151201
[St] Status:MEDLINE


  3 / 28 MEDLINE  
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[PMID]:26284575
[Au] Autor:Walter J; Kreyling J; Singh BK; Jentsch A
[Ad] Endereço:Disturbance Ecology, BayCEER, University of Bayreuth, Bayreuth, Germany.
[Ti] Título:Effects of extreme weather events and legume presence on mycorrhization of Plantago lanceolata and Holcus lanatus in the field.
[So] Source:Plant Biol (Stuttg);18(2):262-70, 2016 Mar.
[Is] ISSN:1438-8677
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Little is known about direct and indirect effects of extreme weather events on arbuscular mycorrhizal fungi (AMF) under field conditions. In a field experiment, we investigated the response of mycorrhization to drought and heavy rain in grassland communities. We quantified AMF biomass in soil, mycorrhization of roots of the grass Holcus lanatus and the forb Plantago lanceolata, as well as plant performance. Plants were grown in four-species communities with or without a legume. We hypothesised that drought increases and heavy rain decreases mycorrhization, and that higher mycorrhization will be linked to improved stress resistance and higher biomass production. Soil AMF biomass increased under both weather extremes. Heavy rain generally benefitted plants and increased arbuscules in P. lanceolata. Drought neither reduced plant performance nor root mycorrhization. Arbuscules increased in H. lanatus several weeks after drought, and in P. lanceolata several weeks after heavy rain spells. These long-lasting effects of weather events on mycorrhization highlight the indirect influence of climate on AMF via their host plant. Legume presence increased plant community biomass, but had only minor effects on mycorrhization. Arbuscule colonisation was negatively correlated with senescence during the dry summer. Mycorrhization and biomass production in P. lanceolata were positively related. However, increased mycorrhization was related to less biomass in the grass. AMF mycelium in soil might generally increase under extreme events, root colonisation, however, is host species specific. This might amplify community shifts in grassland under climate change by further increasing stress resistance of species that already benefit from changed precipitation.
[Mh] Termos MeSH primário: Fabaceae/fisiologia
Holcus/microbiologia
Micorrizas/fisiologia
Plantago/microbiologia
Tempo (Meteorologia)
[Mh] Termos MeSH secundário: Compostos de Amônio/análise
Análise de Variância
Biomassa
Contagem de Colônia Microbiana
Nitratos/análise
Nitrogênio/análise
Folhas de Planta/fisiologia
Estações do Ano
Solo/química
Especificidade da Espécie
Água/química
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Ammonium Compounds); 0 (Nitrates); 0 (Soil); 059QF0KO0R (Water); N762921K75 (Nitrogen)
[Em] Mês de entrada:1610
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150819
[St] Status:MEDLINE
[do] DOI:10.1111/plb.12379


  4 / 28 MEDLINE  
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[PMID]:25944155
[Au] Autor:Gong XY; Schäufele R; Feneis W; Schnyder H
[Ad] Endereço:Lehrstuhl für Grünlandlehre, Technische Universität München, 85354, Freising, Germany.
[Ti] Título:(13) CO2 /(12) CO2 exchange fluxes in a clamp-on leaf cuvette: disentangling artefacts and flux components.
[So] Source:Plant Cell Environ;38(11):2417-32, 2015 Nov.
[Is] ISSN:1365-3040
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Leaks and isotopic disequilibria represent potential errors and artefacts during combined measurements of gas exchange and carbon isotope discrimination (Δ). This paper presents new protocols to quantify, minimize, and correct such phenomena. We performed experiments with gradients of CO2 concentration (up to ±250 µmol mol(-1) ) and δ(13) CCO2 (34‰), between a clamp-on leaf cuvette (LI-6400) and surrounding air, to assess (1) leak coefficients for CO2 , (12) CO2 , and (13) CO2 with the empty cuvette and with intact leaves of Holcus lanatus (C3 ) or Sorghum bicolor (C4 ) in the cuvette; and (2) isotopic disequilibria between net photosynthesis and dark respiration in light. Leak coefficients were virtually identical for (12) CO2 and (13) CO2 , but ∼8 times higher with leaves in the cuvette. Leaks generated errors on Δ up to 6‰ for H. lanatus and 2‰ for S. bicolor in full light; isotopic disequilibria produced similar variation of Δ. Leak errors in Δ in darkness were much larger due to small biological : leak flux ratios. Leak artefacts were fully corrected with leak coefficients determined on the same leaves as Δ measurements. Analysis of isotopic disequilibria enabled partitioning of net photosynthesis and dark respiration, and indicated inhibitions of dark respiration in full light (H. lanatus: 14%, S. bicolor: 58%).
[Mh] Termos MeSH primário: Dióxido de Carbono/metabolismo
Holcus/metabolismo
Sorghum/metabolismo
[Mh] Termos MeSH secundário: Respiração Celular
Espectrometria de Massas
Fotossíntese
Folhas de Planta/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
142M471B3J (Carbon Dioxide)
[Em] Mês de entrada:1609
[Cu] Atualização por classe:151028
[Lr] Data última revisão:
151028
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150507
[St] Status:MEDLINE
[do] DOI:10.1111/pce.12564


  5 / 28 MEDLINE  
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[PMID]:25772030
[Au] Autor:Gargallo-Garriga A; Sardans J; Pérez-Trujillo M; Oravec M; Urban O; Jentsch A; Kreyling J; Beierkuhnlein C; Parella T; Peñuelas J
[Ad] Endereço:Global Ecology Unit CREAF-CSIC-UAB, CSIC, Cerdanyola del vallès, Catalonia, 08193, Spain.
[Ti] Título:Warming differentially influences the effects of drought on stoichiometry and metabolomics in shoots and roots.
[So] Source:New Phytol;207(3):591-603, 2015 Aug.
[Is] ISSN:1469-8137
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Plants in natural environments are increasingly being subjected to a combination of abiotic stresses, such as drought and warming, in many regions. The effects of each stress and the combination of stresses on the functioning of shoots and roots have been studied extensively, but little is known about the simultaneous metabolome responses of the different organs of the plant to different stresses acting at once. We studied the shift in metabolism and elemental composition of shoots and roots of two perennial grasses, Holcus lanatus and Alopecurus pratensis, in response to simultaneous drought and warming. These species responded differently to individual and simultaneous stresses. These responses were even opposite in roots and shoots. In plants exposed to simultaneous drought and warming, terpenes, catechin and indole acetic acid accumulated in shoots, whereas amino acids, quinic acid, nitrogenous bases, the osmoprotectants choline and glycine betaine, and elements involved in growth (nitrogen, phosphorus and potassium) accumulated in roots. Under drought, warming further increased the allocation of primary metabolic activity to roots and changed the composition of secondary metabolites in shoots. These results highlight the plasticity of plant metabolomes and stoichiometry, and the different complementary responses of shoots and roots to complex environmental conditions.
[Mh] Termos MeSH primário: Secas
Holcus/metabolismo
Temperatura Alta
Metabolômica
Raízes de Plantas/metabolismo
Brotos de Planta/metabolismo
Poaceae/metabolismo
[Mh] Termos MeSH secundário: Análise Discriminante
Elementos
Análise dos Mínimos Quadrados
Metaboloma
Análise de Componente Principal
Estações do Ano
Especificidade da Espécie
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Elements)
[Em] Mês de entrada:1604
[Cu] Atualização por classe:150708
[Lr] Data última revisão:
150708
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150317
[St] Status:MEDLINE
[do] DOI:10.1111/nph.13377


  6 / 28 MEDLINE  
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[PMID]:25542204
[Au] Autor:Schirrmann MK; Zoller S; Fior S; Leuchtmann A
[Ad] Endereço:ETH Zurich, Institute of Integrative Biology (IBZ), Universitätstrasse 16, 8092, Zürich, Switzerland, melanie.schirrmann@env.ethz.ch.
[Ti] Título:Genetic evidence for reproductive isolation among sympatric Epichloë endophytes as inferred from newly developed microsatellite markers.
[So] Source:Microb Ecol;70(1):51-60, 2015 Jul.
[Is] ISSN:1432-184X
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Reproductive isolation is central to the maintenance of species, and especially in sympatry, effective barriers to prevent interspecific crosses are expected. Host specificity is thought to constitute an effective mechanism for the formation of barriers in different genera of Fungi, but evidence for endophytes is so far lacking. Sexual Epichloë species (Ascomycota, Clavicipitaceae) represent an ideal study system to investigate the mechanisms underlying speciation as mediated by host specificity because they include species complexes with several host-specific taxa. Here, we studied genetic differentiation of three host-specific Epichloë species using microsatellite markers that were newly in silico identified on the genome of Epichloë poae. Among these, 15 were experimentally tested and applied to study an extensive sampling of isolates representing Epichloë typhina infecting Dactylis glomerata and Epichloë clarkii infecting Holcus lanatus from a site with sympatric populations in Switzerland, as well as a reduced sampling of E. poae infecting Poa nemoralis to create a three-taxon dataset. Both principal coordinate analysis and Bayesian clustering algorithm showed three genetically distinct groups representing the three host-specific species. High pairwise F ST values among the three species, as well as sequencing data of the tefA gene revealing diagnostic single nucleotide polymorphisms (SNPs), further support the hypothesis of genetic discontinuities among the taxa. These results provide genotypic evidence of the maintenance of reproductive isolation of the species in a context of sympatry. In silico testing of 885 discovered microsatellites on the genome of Epichloë festucae extend their applicability to a wider taxonomic range of Epichloë.
[Mh] Termos MeSH primário: Dactylis/microbiologia
Ecossistema
Epichloe/genética
Especiação Genética
Variação Genética
Holcus/microbiologia
Isolamento Reprodutivo
[Mh] Termos MeSH secundário: Sequência de Bases
Teorema de Bayes
Epichloe/classificação
Genética Populacional
Repetições de Microssatélites/genética
Dados de Sequência Molecular
Polimorfismo de Nucleotídeo Único/genética
Análise de Componente Principal
Análise de Sequência de DNA
Especificidade da Espécie
Suíça
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1603
[Cu] Atualização por classe:170922
[Lr] Data última revisão:
170922
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:141228
[St] Status:MEDLINE
[do] DOI:10.1007/s00248-014-0556-5


  7 / 28 MEDLINE  
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[PMID]:24933887
[Au] Autor:Balseiro-Romero M; Kidd PS; Monterroso C
[Ti] Título:Influence of plant root exudates on the mobility of fuel volatile compounds in contaminated soils.
[So] Source:Int J Phytoremediation;16(7-12):824-39, 2014.
[Is] ISSN:1522-6514
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Vegetation and its associated microorganisms play an important role in the behaviour of soil contaminants. One of the most important elements is root exudation, since it can affect the mobility, and therefore, the bioavailability of soil contaminants. In this study, we evaluated the influence of root exudates on the mobility of fuel derived compounds in contaminated soils. Samples of humic acid, montmorillonite, and an A horizon from an alumi-umbric Cambisol were contaminated with volatile contaminants present in fuel: oxygenates (MTBE and ETBE) and monoaromatic compounds (benzene, toluene, ethylbenzene and xylene). Natural root exudates obtained from Holcus lanatus and Cytisus striatus and ten artificial exudates (components frequently found in natural exudates) were added to the samples, individually and as a mixture, to evaluate their effects on contaminant mobility. Fuel compounds were analyzed by headspace-gas chromatography-mass spectrometry. In general, the addition of natural and artificial exudates increased the mobility of all contaminants in humic acid. In A horizon and montmorillonite, natural or artificial exudates (as a mixture) decreased the contaminant mobility. However, artificial exudates individually had different effects: carboxylic components increased and phenolic components decreased the contaminant mobility. These results established a base for developing and improving phytoremediation processes of fuel-contaminated soils.
[Mh] Termos MeSH primário: Cytisus/química
Holcus/química
Exsudatos de Plantas/química
Raízes de Plantas/química
Poluentes do Solo/metabolismo
[Mh] Termos MeSH secundário: Derivados de Benzeno/análise
Derivados de Benzeno/metabolismo
Biodegradação Ambiental
Cytisus/metabolismo
Gasolina
Holcus/metabolismo
Exsudatos de Plantas/isolamento & purificação
Raízes de Plantas/metabolismo
Solo/química
Poluentes do Solo/análise
Tolueno/análise
Tolueno/metabolismo
Xilenos/análise
Xilenos/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Benzene Derivatives); 0 (Gasoline); 0 (Plant Exudates); 0 (Soil); 0 (Soil Pollutants); 0 (Xylenes); 3FPU23BG52 (Toluene); L5I45M5G0O (ethylbenzene)
[Em] Mês de entrada:1408
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140618
[St] Status:MEDLINE


  8 / 28 MEDLINE  
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[PMID]:24102375
[Au] Autor:Meharg C; Khan B; Norton G; Deacon C; Johnson D; Reinhardt R; Huettel B; Meharg AA
[Ad] Endereço:Institute for Global Food Security, Queen's University Belfast, David Keir Building, Malone Road, Belfast, BT9 5BN, UK.
[Ti] Título:Trait-directed de novo population transcriptome dissects genetic regulation of a balanced polymorphism in phosphorus nutrition/arsenate tolerance in a wild grass, Holcus lanatus.
[So] Source:New Phytol;201(1):144-54, 2014 Jan.
[Is] ISSN:1469-8137
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The aim of this study was to characterize the transcriptome of a balanced polymorphism, under the regulation of a single gene, for phosphate fertilizer responsiveness/arsenate tolerance in wild grass Holcus lanatus genotypes screened from the same habitat. De novo transcriptome sequencing, RNAseq (RNA sequencing) and single nucleotide polymorphism (SNP) calling were conducted on RNA extracted from H. lanatus. Roche 454 sequencing data were assembled into c. 22,000 isotigs, and paired-end Illumina reads for phosphorus-starved (P-) and phosphorus-treated (P+) genovars of tolerant (T) and nontolerant (N) phenotypes were mapped to this reference transcriptome. Heatmaps of the gene expression data showed strong clustering of each P+/P- treated genovar, as well as clustering by N/T phenotype. Statistical analysis identified 87 isotigs to be significantly differentially expressed between N and T phenotypes and 258 between P+ and P- treated plants. SNPs and transcript expression that systematically differed between N and T phenotypes had regulatory function, namely proteases, kinases and ribonuclear RNA-binding protein and transposable elements. A single gene for arsenate tolerance led to distinct phenotype transcriptomes and SNP profiles, with large differences in upstream post-translational and post-transcriptional regulatory genes rather than in genes directly involved in P nutrition transport and metabolism per se.
[Mh] Termos MeSH primário: Arseniatos/farmacologia
Arsênico/farmacologia
Regulação da Expressão Gênica de Plantas
Holcus/genética
Fósforo/metabolismo
Polimorfismo de Nucleotídeo Único
Transcriptoma/genética
[Mh] Termos MeSH secundário: Adaptação Fisiológica/genética
Sequência de Bases
Expressão Gênica
Genes de Plantas
Genótipo
Holcus/metabolismo
Fenótipo
Fosfatos/metabolismo
RNA de Plantas
Análise de Sequência de RNA
Estresse Fisiológico/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Arsenates); 0 (Phosphates); 0 (RNA, Plant); 27YLU75U4W (Phosphorus); N712M78A8G (Arsenic); N7CIZ75ZPN (arsenic acid)
[Em] Mês de entrada:1407
[Cu] Atualização por classe:131126
[Lr] Data última revisão:
131126
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:131010
[St] Status:MEDLINE
[do] DOI:10.1111/nph.12491


  9 / 28 MEDLINE  
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[PMID]:23773148
[Au] Autor:Chen ZC; Yokosho K; Kashino M; Zhao FJ; Yamaji N; Ma JF
[Ad] Endereço:Institute of Plant Science and Resources, Okayama University, Chuo 2-20-1, Kurashiki, Japan.
[Ti] Título:Adaptation to acidic soil is achieved by increased numbers of cis-acting elements regulating ALMT1 expression in Holcus lanatus.
[So] Source:Plant J;76(1):10-23, 2013 Oct.
[Is] ISSN:1365-313X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Yorkshire fog (Holcus lanatus), which belongs to the Poaceae family and is a close relative of the agronomic crop oat (Avena sativa), is a widely adaptable grass species that is able to grow on highly acidic soils with high levels of Al, but the mechanism underlying the high Al tolerance is unknown. Here, we characterized two accessions of H. lanatus collected from an acid plot (soil pH 3.6, HL-A) and a neutral plot (pH 7.1, HL-N) in terms of Al tolerance, organic acid anion secretion and related gene expression. In response to Al (pH 4.5), the HL-A roots secreted approximately twice as much malate as the HL-N roots, but there was no difference in citrate secretion. Cloning of the gene HlALMT1 responsible for malate secretion showed that the encoded amino acid sequence did not differ between two accessions, but the expression level in the outer cell layers of the HL-A roots was twice as high as in the HL-N roots. This difference was not due to the genomic copy number, but was due to the number of cis-acting elements for an Al-responsive transcription factor (HlART1) in the promoter region of HlALMT1, as demonstrated by both a yeast one-hybrid assay and a transient assay in tobacco protoplasts. Furthermore, introduction of HlALMT1 driven by the HL-A promoter into rice resulted in significantly more Al-induced malate secretion than introduction of HlALMT1 driven by the HL-N promoter. These findings indicate that the adaptation of H. lanatus to acidic soils may be achieved by increasing number of cis-acting elements for ART1 in the promoter region of the HlALMT1 gene, enhancing the expression of HlALMT1 and the secretion of malate.
[Mh] Termos MeSH primário: Alumínio/farmacologia
Regulação da Expressão Gênica de Plantas
Holcus/genética
Malatos/metabolismo
Proteínas de Plantas/genética
[Mh] Termos MeSH secundário: Adaptação Fisiológica
Sequência de Bases
Transporte Biológico
Ácidos Carboxílicos/análise
Dosagem de Genes
Holcus/efeitos dos fármacos
Holcus/fisiologia
Concentração de Íons de Hidrogênio
Dados de Sequência Molecular
Transportadores de Ânions Orgânicos/genética
Transportadores de Ânions Orgânicos/metabolismo
Filogenia
Raízes de Plantas/efeitos dos fármacos
Raízes de Plantas/genética
Raízes de Plantas/fisiologia
Plantas Geneticamente Modificadas
Regiões Promotoras Genéticas/genética
Análise de Sequência de DNA
Solo/química
Especificidade da Espécie
Fatores de Transcrição/genética
Fatores de Transcrição/metabolismo
Técnicas do Sistema de Duplo-Híbrido
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Carboxylic Acids); 0 (Malates); 0 (Organic Anion Transporters); 0 (Plant Proteins); 0 (Soil); 0 (Transcription Factors); 817L1N4CKP (malic acid); CPD4NFA903 (Aluminum)
[Em] Mês de entrada:1405
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:130619
[St] Status:MEDLINE
[do] DOI:10.1111/tpj.12266


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[PMID]:23487988
[Au] Autor:Lewinska K; Karczewska A
[Ad] Endereço:Institute of Soil Science and Environmental Protection, Wroclaw University of Environmental and Life Sciences, Grunwaldzka, Wroclaw, Poland.
[Ti] Título:Influence of soil properties and phosphate addition on arsenic uptake from polluted soils by velvetgrass (Holcus lanatus).
[So] Source:Int J Phytoremediation;15(1):91-104, 2013.
[Is] ISSN:1522-6514
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Four kinds of soil material were used in a pot experiment with velvetgrass (Holcus lanatus). Two unpolluted soils: sand (S) and loam (L) were spiked with sodium arsenite (As II) and arsenate (As V), to obtain total arsenic (As) concentrations of 500 mg As kg(-1). Two other soils (ZS I, ZS III), containing 3320 and 5350 mg As kg(-1), were collected from Zloty Stok where gold and arsenic ores were mined and processed for several centuries. The effects of phosphate addition on plants growth and As uptake were investigated. Phosphate was applied to soils in the form of NH4H2PO4 at the rate 0.2 g P/kg. Average concentrations of arsenic in the shoots of velvetgrass grown in spiked soils S and L without P amendment were in the range 18-210 mg As kg(-1) d.wt., whereas those in plants grown on ZS I and ZS II soils were considerably lower, and varied in the range 11-52 mg As kg(-1) d.wt. The addition of phosphate caused a significant increase in plant biomass and therefore the total amounts of As taken up by plants, however, the differences in As concentrations in the shoots of velvetgrass amended and non-amended with phosphate were not statistically significant.
[Mh] Termos MeSH primário: Arsênico/metabolismo
Holcus/efeitos dos fármacos
Fosfatos/farmacologia
Poluentes do Solo/metabolismo
Solo/química
[Mh] Termos MeSH secundário: Arsênico/análise
Biodegradação Ambiental
Transporte Biológico
Biomassa
Holcus/metabolismo
Concentração de Íons de Hidrogênio
Mineração
Raízes de Plantas/efeitos dos fármacos
Raízes de Plantas/metabolismo
Brotos de Planta/efeitos dos fármacos
Brotos de Planta/metabolismo
Polônia
Plântulas/efeitos dos fármacos
Plântulas/metabolismo
Solubilidade
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Phosphates); 0 (Soil); 0 (Soil Pollutants); N712M78A8G (Arsenic)
[Em] Mês de entrada:1306
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:130316
[St] Status:MEDLINE



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