Base de dados : MEDLINE
Pesquisa : D02.455.426.559.389.703.397 [Categoria DeCS]
Referências encontradas : 1308 [refinar]
Mostrando: 1 .. 10   no formato [Detalhado]

página 1 de 131 ir para página                         

  1 / 1308 MEDLINE  
              next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28809955
[Au] Autor:Wang Y; Li H; Feng G; Du L; Zeng D
[Ad] Endereço:Institute of Pesticide and Environmental Toxicology, Guangxi University, Nanning, PR China.
[Ti] Título:Biodegradation of diuron by an endophytic fungus Neurospora intermedia DP8-1 isolated from sugarcane and its potential for remediating diuron-contaminated soils.
[So] Source:PLoS One;12(8):e0182556, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:A diuron-degrading endophyte DP8-1 was isolated from sugarcane root grown in diuron-treated soil in the present study. The endophyte was identified as Neurospora intermedia based on the morphological characteristics and sequence analysis. The fermentation parameters including temperature, pH, inoculation size, carbon source, and initial diuron concentration were also investigated for the optimization of degradation efficiency. The results indicated that strain DP8-1 was capable of degrading up to 99% diuron within 3 days under the optimal degrading condition. The study of degradation spectrum indicated that strain DP8-1 could also degrade and utilize fenuron, monuron, metobromuron, isoproturon, chlorbromuron, linuron, and chlortoluron as substrate for strain growth. On basis of liquid chromatography-mass spectrometry analysis for the products of the degradation of diuron, strain DP8-1 metabolized diuron to produce N-(3,4-dichlorophenyl)-urea and N-(3,4-dichlorophenyl)-N-methylurea through sequential N-dealkylations. In a soil bioaugmentation experiment, the inoculation of strain DP8-1 into diuron-treated soil effectively enhanced the disappearance rate of diuron.
[Mh] Termos MeSH primário: Biodegradação Ambiental
Diurona/metabolismo
Neurospora/metabolismo
Saccharum/microbiologia
Poluentes do Solo/metabolismo
[Mh] Termos MeSH secundário: Cromatografia Líquida
Espectrometria de Massas
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Soil Pollutants); 9I3SDS92WY (Diuron)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171011
[Lr] Data última revisão:
171011
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170816
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0182556


  2 / 1308 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28622555
[Au] Autor:Zarei K; Khodadadi A
[Ad] Endereço:School of Chemistry, Damghan University, Damghan, Iran. Electronic address: zarei@du.ac.ir.
[Ti] Título:Very sensitive electrochemical determination of diuron on glassy carbon electrode modified with reduced graphene oxide-gold nanoparticle-Nafion composite film.
[So] Source:Ecotoxicol Environ Saf;144:171-177, 2017 Oct.
[Is] ISSN:1090-2414
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:In this work, a very sensitive electrochemical sensor based on glassy carbon electrode (GCE) modified with reduced graphene oxide-gold nanoparticles/Nafion (rGO-AuNPs/Nafion) composite film was applied to determine diuron. Synthesized GO was characterized using X-ray diffraction (XRD) and UV-visible spectroscopy. The surface morphology of the rGO-AuNPs/Nafion film was also characterized using scanning electron microscopy and electrochemical impedance spectroscopy. Cyclic voltammetry (CV) and adsorptive differential pulse voltammetry (AdDPV) were applied to investigate the electrochemical response of the diuron on the modified electrode. The electrode showed a linear response at 1.0×10 -1.0×10 M and a detection limit of 0.3nM under the optimized conditions. The effect of some other species on the determination of diuron was investigated and the sensor showed good selectivity for determination of diuron. The constructed sensor was applied to determine diuron in enriched samples of orange juice, mineral and tap water which statistical t-test showed accuracy of method. Also the sensor was applied to obtain diuron content in the tea sample. The reliability of the proposed sensor was confirmed after comparing the results with those obtained using high performance liquid chromatography (HPLC) as a comparative method.
[Mh] Termos MeSH primário: Diurona/análise
Técnicas Eletroquímicas/métodos
Poluentes Ambientais/análise
Polímeros de Fluorcarboneto/química
Ouro/química
Grafite/química
Nanopartículas/química
[Mh] Termos MeSH secundário: Eletrodos
Limite de Detecção
Microscopia Eletrônica de Varredura
Óxidos/química
Reprodutibilidade dos Testes
Propriedades de Superfície
Difração de Raios X
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Environmental Pollutants); 0 (Fluorocarbon Polymers); 0 (Oxides); 39464-59-0 (perfluorosulfonic acid); 7440-57-5 (Gold); 7782-42-5 (Graphite); 9I3SDS92WY (Diuron)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171110
[Lr] Data última revisão:
171110
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170617
[St] Status:MEDLINE


  3 / 1308 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28577487
[Au] Autor:Chen H; Luo Y; Potter C; Moran PJ; Grieneisen ML; Zhang M
[Ad] Endereço:Department of Land, Air and Water Resources, University of California, Davis, 1 Shields Avenue, CA 95616, USA.
[Ti] Título:Modeling pesticide diuron loading from the San Joaquin watershed into the Sacramento-San Joaquin Delta using SWAT.
[So] Source:Water Res;121:374-385, 2017 Sep 15.
[Is] ISSN:1879-2448
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Quantifying pesticide loading into the Sacramento-San Joaquin Delta of northern California is critical for water quality management in the region, and potentially useful for biological weed control planning. In this study, the Soil and Water Assessment Tool (SWAT) was applied to model streamflow, sediment, and pesticide diuron loading in the San Joaquin watershed, a major contributing area to the elevated pesticide levels in the downstream Delta. The Sequential Uncertainty Fitting version 2 (SUFI-2) algorithm was employed to perform calibration and uncertainty analysis. A combination of performance measures (PMs) and standardized performance evaluation criteria (PEC) was applied to evaluate model performance, while prediction uncertainty was quantified by 95% prediction uncertainty band (95PPU). Results showed that streamflow simulation was at least "satisfactory" at most stations, with more than 50% of the observed data bracketed by the 95PPU. Sediment simulation was rated as at least "satisfactory" based on two PMs, and diuron simulation was judged as "good" by all PMs. The 95PPU of sediment and diuron bracketed about 40% and 30% of the observed data, respectively. Significant correlations were observed between the diuron loads, and precipitation, streamflow, and the current and antecedent pesticide use. Results also showed that the majority (>70%) of agricultural diuron was transported during winter months, when direct exposure of biocontrol agents to diuron runoff is limited. However, exposure in the dry season could be a concern because diuron is relatively persistent in aquatic system. This study not only provides valuable information for the development of biological weed control plan in the Delta, but also serves as a foundation for the continued research on calibration, evaluation, and uncertainty analysis of spatially distributed, physically based hydrologic models.
[Mh] Termos MeSH primário: Diurona
Monitoramento Ambiental
Praguicidas
Poluentes Químicos da Água
[Mh] Termos MeSH secundário: California
Modelos Teóricos
Solo
Água
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Pesticides); 0 (Soil); 0 (Water Pollutants, Chemical); 059QF0KO0R (Water); 9I3SDS92WY (Diuron)
[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:170604
[St] Status:MEDLINE


  4 / 1308 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28501690
[Au] Autor:Howe PL; Reichelt-Brushett AJ; Clark MW; Seery CR
[Ad] Endereço:Marine Ecology Research Centre, School of Environment, Science and Engineering, Southern Cross University, PO Box 157, Lismore, NSW 2480, Australia.
[Ti] Título:Toxicity estimates for diuron and atrazine for the tropical marine cnidarian Exaiptasia pallida and in-hospite Symbiodinium spp. using PAM chlorophyll-a fluorometry.
[So] Source:J Photochem Photobiol B;171:125-132, 2017 Jun.
[Is] ISSN:1873-2682
[Cp] País de publicação:Switzerland
[La] Idioma:eng
[Ab] Resumo:Effective ecotoxicological risk assessments for herbicides in tropical marine environments are restricted by a lack of toxicity data, sensitive test methods and endpoints for relevant species, and this requires rectification. The symbiotic sea anemone Exaiptasia pallida is a suitable test species, representing the phylum Cnidaria and allowing for assessments of toxicological responses of both the animal host and in-hospite Symbiodinium spp. Pulse amplitude modulated (PAM) chlorophyll-a fluorometry is recognised as a valuable ecotoxicological tool, and here newly-developed test methods are presented using PAM fluorometry to measure herbicide effects on photosynthetic efficiency of in-hospite Symbiodinium spp. Additionally, measurements on healthy laboratory-reared E. pallida provide baseline data demonstrating the normal effective quantum yield (EQY) and the maximum electron transport rate (ETR ) for Symbiodinium spp. in the absence of herbicide stress. Concentration-dependant reductions in the EQY and ETR occurred during diuron and atrazine exposures; a mean 48-h EC50 (effective concentration; 50%) of 8µg/L of diuron was estimated, however atrazine elicited a much lower toxicity. Twelve-day exposures to 10-200µg/L diuron showed that the greatest EQY effect occurred during the first 48h, with little subsequent change. However, longer exposures to the lowest diuron treatment (1µg/L) showed the lowest EQYs after 96h followed by recovery to control levels within 12d. Furthermore, asexual reproduction was inhibited during 12-d exposures to diuron, and 12-d EC50 values of 100 and 132µg/L were estimated to inhibit successful reproduction of pedal lacerates and juveniles by 50% respectively. This study provides much needed data contributions to species sensitivity curves for development of diuron and atrazine water quality guidelines in tropical marine environments.
[Mh] Termos MeSH primário: Alveolados/efeitos dos fármacos
Atrazina/toxicidade
Clorofila/análise
Diurona/toxicidade
Fluorometria
Herbicidas/toxicidade
Anêmonas-do-Mar/efeitos dos fármacos
[Mh] Termos MeSH secundário: Animais
Anêmonas-do-Mar/crescimento & desenvolvimento
Anêmonas-do-Mar/metabolismo
Anêmonas-do-Mar/parasitologia
Simbiose/efeitos dos fármacos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Herbicides); 1406-65-1 (Chlorophyll); 9I3SDS92WY (Diuron); QJA9M5H4IM (Atrazine); YF5Q9EJC8Y (chlorophyll a)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170920
[Lr] Data última revisão:
170920
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170515
[St] Status:MEDLINE


  5 / 1308 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28494358
[Au] Autor:Rowen DJ; Templeman MA; Kingsford MJ
[Ad] Endereço:College of Marine & Environmental Sciences, James Cook University, Townsville, QLD 4811, Australia.
[Ti] Título:Herbicide effects on the growth and photosynthetic efficiency of Cassiopea maremetens.
[So] Source:Chemosphere;182:143-148, 2017 Sep.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Herbicides from agricultural run-off have been measured in coastal systems of the Great Barrier Reef over many years. Non-target herbicide exposure, especially photosystem II herbicides has the potential to affect seagrasses and other marine species. The symbiotic benthic jellyfish Cassiopea maremetens is present in tropical/sub-tropical estuarine and marine environments. Jellyfish (n = 8 per treatment) were exposed to four separate concentrations of agricultural formulations of diuron or hexazinone to determine their sensitivity and potential for recovery to pulsed herbicide exposure. Jellyfish growth, symbiont photosynthetic activity and zooxanthellae density were analysed for herbicide-induced changes for 7 days followed by a 7 day recovery period. Both the jellyfish and endosymbiont were more sensitive to diuron than hexazinone. The 7-day EC for jellyfish growth was 0.35 µg L for Diuron and 17.5 µg L for Hexazinone respectively. Diuron exposure caused a significant decrease (p < 0.05) in jellyfish growth at 0.1 µg L , a level that is below the regional Great Barrier Reef guideline value. Jellyfish recovery was rapid with growth rates similar to control animals following removal from herbicide exposure. Both diuron and hexazinone caused significant decreases in photosynthetic efficiency (effective quantum yield) in all treatment concentrations (0.1 µg L and above) and this effect continued in the post-exposure period. As this species is frequently found in near-shore environments, they may be particularly vulnerable to herbicide run-off.
[Mh] Termos MeSH primário: Herbicidas/farmacologia
Rhizophoraceae/efeitos dos fármacos
Cifozoários/efeitos dos fármacos
[Mh] Termos MeSH secundário: Animais
Diurona/farmacologia
Fotossíntese/efeitos dos fármacos
Complexo de Proteína do Fotossistema II/efeitos dos fármacos
Rhizophoraceae/crescimento & desenvolvimento
Rhizophoraceae/fisiologia
Triazinas/farmacologia
Poluentes Químicos da Água/farmacologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Herbicides); 0 (Photosystem II Protein Complex); 0 (Triazines); 0 (Water Pollutants, Chemical); 9I3SDS92WY (Diuron); Y51727MR1Y (hexazinone)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170922
[Lr] Data última revisão:
170922
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170512
[St] Status:MEDLINE


  6 / 1308 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28433596
[Au] Autor:Mansano AS; Moreira RA; Dornfeld HC; Freitas EC; Vieira EM; Sarmento H; Rocha O; Seleghim MHR
[Ad] Endereço:Department of Ecology and Evolutionary Biology, Federal University of São Carlos, Rodovia Washington Luis, km 235, 13565-905 São Carlos, SP, Brazil. Electronic address: laine_mansano@yahoo.com.br.
[Ti] Título:Effects of diuron and carbofuran and their mixtures on the microalgae Raphidocelis subcapitata.
[So] Source:Ecotoxicol Environ Saf;142:312-321, 2017 Aug.
[Is] ISSN:1090-2414
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:In aquatic environments, organisms are often exposed to mixtures of several pesticides. In this study, the effects of carbofuran and diuron and their mixtures on the microalgae Raphidocelis subcapitata were investigated. For this purpose, toxicity tests were performed with the single compounds (active ingredients and commercial formulations) and their combinations (only active ingredients). According to the results, the toxicity of active ingredients and their commercial formulations to R. subcapitata was similar. In the single exposures, both carbofuran and diuron inhibited significantly the R. subcapitata growth and caused physiological (chlorophyll a content) and morphological (complexity and cell size) changes in cells, as captured by flow cytometry single-cell properties. Regarding the mixture toxicity tests, data fitted to both reference models, concentration addition (CA) and independent action (IA), and evidenced significant deviations. After the CA fitting, dose-ratio dependent deviation had the best fit to the data, demonstrating synergism caused mainly by diuron and antagonism caused mainly by carbofuran. After fitting the IA model, a synergistic deviation represented the best fit for the diuron and carbofuran mixtures. In general, the two reference models indicated the occurrence of synergism in the mixtures of these compounds, especially when diuron was the dominant chemical in the combinations. The increased toxicity caused by the mixture of these pesticides could pose a greater environmental risk for phytoplankton. Thus, exposure to diuron and carbofuran mixtures must also be considered in risk assessments, since the combination of these compounds may result in more severe effects on algae population growth than single exposures.
[Mh] Termos MeSH primário: Carbofurano/toxicidade
Clorófitas/efeitos dos fármacos
Diurona/toxicidade
Microalgas/efeitos dos fármacos
Praguicidas/toxicidade
Poluentes Químicos da Água/toxicidade
[Mh] Termos MeSH secundário: Carbofurano/análise
Clorofila/metabolismo
Clorófitas/metabolismo
Diurona/análise
Sinergismo Farmacológico
Microalgas/metabolismo
Praguicidas/química
Fitoplâncton/efeitos dos fármacos
Testes de Toxicidade
Poluentes Químicos da Água/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Pesticides); 0 (Water Pollutants, Chemical); 1406-65-1 (Chlorophyll); 9I3SDS92WY (Diuron); SKF77S6Y67 (Carbofuran); YF5Q9EJC8Y (chlorophyll a)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170918
[Lr] Data última revisão:
170918
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170424
[St] Status:MEDLINE


  7 / 1308 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28391154
[Au] Autor:Velki M; Di Paolo C; Nelles J; Seiler TB; Hollert H
[Ad] Endereço:Department of Ecosystem Analysis, Institute for Environmental Research, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany; Department of Biology, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia. Electronic address: mirna.velki@gmail.com.
[Ti] Título:Diuron and diazinon alter the behavior of zebrafish embryos and larvae in the absence of acute toxicity.
[So] Source:Chemosphere;180:65-76, 2017 Aug.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The use of zebrafish for aquatic vertebrate (eco)toxicity testing allows the assessment of effects on a wide range of biological levels - from enzymes to sensory organs and behavioral endpoints. The present study investigated the effects of the insecticide diazinon and the herbicide diuron regarding the acute toxicity and behavior of zebrafish embryos and larvae. After conducting the fish embryo toxicity test, three concentrations (1, 2 and 3.5 mg L for diazinon and 1, 2 and 3.8 mg L for diuron) were evaluated for effects on embryonic spontaneous movement and heartbeat, larval light-dark transition response, and thigmotaxis. Although the modes-of-action are different, both pesticides proved to be moderately toxic to early life stages of zebrafish with 96 h LC of approximately 6.5 mg L and similar EC values of approximately 4 mg L . Changes in behavioral endpoints were detected 24 h of exposure, suggesting that behavioral measurements can serve as sensitive and early indicators of pesticide exposure. Changes in behavior, such as decrease in spontaneous coiling movements of embryos and reduction of thigmotaxis in larvae, were pronounced for diuron, indicating the usefulness of the application of behavioral endpoints to assess the effects of other herbicides. In the case of diazinon, the effects were less prominent, but the detected changes in ratios between activity in light and darkness also point to the possibility of using behavioral changes for evaluation of insecticide effects. The obtained results support the usage of behavioral endpoints in zebrafish embryos and larvae for the detection of early effects of pesticides.
[Mh] Termos MeSH primário: Diazinon/toxicidade
Poluentes Químicos da Água/toxicidade
[Mh] Termos MeSH secundário: Animais
Diurona
Embrião não Mamífero/efeitos dos fármacos
Herbicidas/toxicidade
Inseticidas/toxicidade
Larva/efeitos dos fármacos
Locomoção/efeitos dos fármacos
Praguicidas/farmacologia
Testes de Toxicidade
Peixe-Zebra/embriologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Herbicides); 0 (Insecticides); 0 (Pesticides); 0 (Water Pollutants, Chemical); 9I3SDS92WY (Diuron); YUS1M1Q929 (Diazinon)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170906
[Lr] Data última revisão:
170906
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170410
[St] Status:MEDLINE


  8 / 1308 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28388477
[Au] Autor:Bachère E; Barranger A; Bruno R; Rouxel J; Menard D; Piquemal D; Akcha F
[Ad] Endereço:Ifremer, UMR 5244, IHPE Interactions-Hosts-Pathogens-Environments, UPVD, CNRS, Université de Montpellier, CC 80, F-34095 Montpellier, France. Electronic address: ebachere@ifremer.fr.
[Ti] Título:Parental diuron-exposure alters offspring transcriptome and fitness in Pacific oyster Crassostrea gigas.
[So] Source:Ecotoxicol Environ Saf;142:51-58, 2017 Aug.
[Is] ISSN:1090-2414
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:One of the primary challenges in ecotoxicology is to contribute to the assessment of the ecological status of ecosystems. In this study, we used Pacific oyster Crassostrea gigas to explore the effects of a parental exposure to diuron, a herbicide frequently detected in marine coastal environments. The present toxicogenomic study provides evidence that exposure of oyster genitors to diuron during gametogenesis results in changes in offspring, namely, transcriptomic profile alterations, increased global DNA methylation levels and reduced growth and survival within the first year of life. Importantly, we highlighted the limitations to identify particular genes or gene expression signatures that could serve as biomarkers for parental herbicide-exposure and further for multigenerational and transgenerational effects of specific chemical stressors. By analyzing samples from two independent experiments, we demonstrated that, due to complex confounding effects with both tested solvent vehicles, diuron non-specifically affected the offspring transcriptome. These original results question the potential development of predictive genomic tools for detecting specific indirect impacts of contaminants in environmental risk assessments. However, our results indicate that chronic environmental exposure to diuron over several generations may have significant long term impacts on oyster populations with adverse health outcomes.
[Mh] Termos MeSH primário: Crassostrea/efeitos dos fármacos
Diurona/toxicidade
Gametogênese/efeitos dos fármacos
Herbicidas/toxicidade
Transcriptoma/efeitos dos fármacos
Poluentes Químicos da Água/toxicidade
[Mh] Termos MeSH secundário: Animais
Crassostrea/crescimento & desenvolvimento
Metilação de DNA/efeitos dos fármacos
Exposição Ambiental/efeitos adversos
Exposição Ambiental/análise
Gametogênese/genética
Estudo de Associação Genômica Ampla
Toxicogenética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Herbicides); 0 (Water Pollutants, Chemical); 9I3SDS92WY (Diuron)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170915
[Lr] Data última revisão:
170915
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170408
[St] Status:MEDLINE


  9 / 1308 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28364799
[Au] Autor:Jin Y; Chen S; Fan X; Song H; Li X; Xu J; Qian H
[Ad] Endereço:College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310032, PR China.
[Ti] Título:Diuron treatment reveals the different roles of two cyclic electron transfer pathways in photosystem II in Arabidopsis thaliana.
[So] Source:Pestic Biochem Physiol;137:15-20, 2017 Apr.
[Is] ISSN:1095-9939
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Three ecotypes of Arabidopsis thaliana, ecotype Columbia (Wild type, Wt) and two mutants (pgr5 and ndf4), were used to evaluate the effects of diuron on photosynthetic activity of A. thaliana. It was found that diuron adversely affected the fresh weight and chlorophyll content of the plants. Chlorophyll fluorescence studies determined that the pgr5 mutant was more sensitive to diuron than Wt and the ndf4 mutant. Gene expression analysis revealed different roles for the two cyclic electron transfer (CET) pathways, NAD(P)H dehydrogenase (NDH) and proton gradient regulation (PGR5) pathways, in the plant after diuron treatment. For example, a gene in the NDH pathway, lhca5, was activated in the low dose (LD) group in the pgr5 mutant, but was down-regulated in the moderate dose (MD) group, along with two other NDH-related genes (ppl2 and ndhH). In the PGR5 pathway, the pgr5 gene was functional under conditions of increased stress (MD group), and was up-regulated to a greater extent in the ndf4 mutant than that in the Wt and pgr5 mutant. Our results suggest that the PGR5 pathway in plants is more important than the NDH pathway during resistance to environmental stress. Deficiencies in the PGR5 pathway could not be counteracted by the NDH pathway, but deficiencies in the NDH pathway could be overcome by stimulating PGR5.
[Mh] Termos MeSH primário: Proteínas de Arabidopsis/genética
Arabidopsis/efeitos dos fármacos
Arabidopsis/genética
Diurona/toxicidade
Transporte de Elétrons/efeitos dos fármacos
Herbicidas/toxicidade
Fotossíntese/efeitos dos fármacos
Complexo de Proteínas do Centro de Reação Fotossintética/genética
[Mh] Termos MeSH secundário: Arabidopsis/fisiologia
Transporte de Elétrons/genética
Mutação
Fotossíntese/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Arabidopsis Proteins); 0 (Herbicides); 0 (PGR5 protein, Arabidopsis); 0 (Photosynthetic Reaction Center Complex Proteins); 9I3SDS92WY (Diuron)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170621
[Lr] Data última revisão:
170621
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170403
[St] Status:MEDLINE


  10 / 1308 MEDLINE  
              first record previous record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28359990
[Au] Autor:Lima DA; Müller C; Costa AC; Batista PF; Dalvi VC; Domingos M
[Ad] Endereço:Instituto Federal de Educação, Ciência e Tecnologia Goiano, Campus Rio Verde, Caixa Postal 66, 75901-970 Rio Verde, GO, Brazil. Electronic address: demily.andromeda@gmail.com.
[Ti] Título:Morphoanatomical and physiological changes in Bauhinia variegata L. as indicators of herbicide diuron action.
[So] Source:Ecotoxicol Environ Saf;141:242-250, 2017 Jul.
[Is] ISSN:1090-2414
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:The wide use of the herbicide diuron has compromised surrounding uncultivated areas, resulting in acute and/or chronic damage to non-target plants. Thus, the aim of this research was to evaluate physiological and morphoanatomical responses in Bauhinia variegata L. plants to different doses of diuron. Seedlings of 90-day-old B. variegata were transplanted into 10liter pots. After an acclimation period (about 30 days), treatments consisting of different diuron doses were applied: 0 (control), 400, 800, 1600, and 2400g ai ha . The experiment was conducted in a randomized block design in a 5×5 factorial scheme with five doses of diuron five evaluation times, and five replicates per treatment. Anatomical and physiological injuries were observed in leaves of Bauhina variegata 10h after diuron application. Disruption of waxes was observed on both sides of the leaves of plants exposed since the lowest dose. Plasmolysis in cells were observed in treated leaves; more severe damage was observed in plants exposed to higher doses, resulting in rupture of epidermis. The diuron herbicide also caused gradual reduction in the gas exchange and chlorophyll fluorescence variables. Among the morphoanatomical and physiological variables analyzed, the non-invasive ones (e.g., ETR, Y , and F /F ) may be used as biomarkers of diuron action in association with visible symptoms. In addition, changes in leaf blade waxes and chlorophyll parenchyma damage may also be considered additional leaf biomarkers of diuron herbicide action.
[Mh] Termos MeSH primário: Bauhinia/efeitos dos fármacos
Diurona/toxicidade
Monitoramento Ambiental/métodos
Herbicidas/toxicidade
Fotossíntese/efeitos dos fármacos
Folhas de Planta/efeitos dos fármacos
[Mh] Termos MeSH secundário: Bauhinia/metabolismo
Bauhinia/fisiologia
Bauhinia/ultraestrutura
Clorofila/metabolismo
Relação Dose-Resposta a Droga
Folhas de Planta/metabolismo
Folhas de Planta/fisiologia
Folhas de Planta/ultraestrutura
Ceras/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Herbicides); 0 (Waxes); 1406-65-1 (Chlorophyll); 9I3SDS92WY (Diuron)
[Em] Mês de entrada:1707
[Cu] Atualização por classe:170719
[Lr] Data última revisão:
170719
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170401
[St] Status:MEDLINE



página 1 de 131 ir para página                         
   


Refinar a pesquisa
  Base de dados : MEDLINE Formulário avançado   

    Pesquisar no campo  
1  
2
3
 
           



Search engine: iAH v2.6 powered by WWWISIS

BIREME/OPAS/OMS - Centro Latino-Americano e do Caribe de Informação em Ciências da Saúde