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Pesquisa : B01.650.940.800.575.912.250.822.311 [Categoria DeCS]
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[PMID]:28783335
[Au] Autor:Tong Y; Wu Y; Zhao C; Xu Y; Lu J; Xiang S; Zong F; Wu X
[Ad] Endereço:College of Science, China Agricultural University , 2 Yuanmingyuan West Road, Beijing 100083, China.
[Ti] Título:Polymeric Nanoparticles as a Metolachlor Carrier: Water-Based Formulation for Hydrophobic Pesticides and Absorption by Plants.
[So] Source:J Agric Food Chem;65(34):7371-7378, 2017 Aug 30.
[Is] ISSN:1520-5118
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Pesticide formulation is highly desirable for effective utilization of pesticide and environmental pollution reduction. Studies of pesticide delivery system such as microcapsules are developing prosperously. In this work, we chose polymeric nanoparticles as a pesticide delivery system and metolachlor was used as a hydrophobic pesticide model to study water-based mPEG-PLGA nanoparticle formulation. Preparation, characterization results showed that the resulting nanoparticles enhanced "water solubility" of hydrophobic metolachlor and contained no organic solvent or surfactant, which represent one of the most important sources of pesticide pollution. After the release study, absorption of Cy5-labeled nanoparticles into rice roots suggested a possible transmitting pathway of this metolachlor formulation and increased utilization of metolachlor. Furthermore, the bioassay test demonstrated that this nanoparticle showed higher effect than non-nano forms under relatively low concentrations on Oryza sativa, Digitaria sanguinalis. In addition, a simple cytotoxicity test involving metolachlor and metolachlor-loaded nanoparticles was performed, indicating toxicity reduction of the latter to the preosteoblast cell line. All of these results showed that those polymeric nanoparticles could serve as a pesticide carrier with lower environmental impact, comparable effect, and effective delivery.
[Mh] Termos MeSH primário: Acetamidas/química
Nanopartículas/química
Praguicidas/química
Polímeros/química
[Mh] Termos MeSH secundário: Acetamidas/metabolismo
Digitaria/metabolismo
Portadores de Fármacos/química
Composição de Medicamentos
Interações Hidrofóbicas e Hidrofílicas
Nanopartículas/metabolismo
Oryza/metabolismo
Praguicidas/metabolismo
Solubilidade
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Acetamides); 0 (Drug Carriers); 0 (Pesticides); 0 (Polymers); X0I01K05X2 (metolachlor)
[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:170808
[St] Status:MEDLINE
[do] DOI:10.1021/acs.jafc.7b02197


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[PMID]:28371315
[Au] Autor:Su SY; Xue JJ; Yang GY; Lei C; Hou AJ
[Ad] Endereço:Department of Pharmacognosy, School of Pharmacy, Fudan University, Shanghai, 201203, P. R. China.
[Ti] Título:New Cytotoxic Alkylated Chalcones from Fatoua villosa.
[So] Source:Chem Biodivers;14(6), 2017 Jun.
[Is] ISSN:1612-1880
[Cp] País de publicação:Switzerland
[La] Idioma:eng
[Ab] Resumo:Three new alkylated chalcones, villosins A - C (1 - 3), five known analogues, together with ten known coumarins, were isolated from Fatoua villosa. The structures of the new compounds were elucidated by extensive spectroscopic analysis, including 1D-, 2D-NMR, and MS data. Compounds 1 - 3 showed cytotoxicity against five kinds of human tumor cell lines (NB4, A549, SHSY5Y, PC3, and MCF7) with IC values ranging from 1.4 ± 0.1 to 5.7 ± 0.3 µm.
[Mh] Termos MeSH primário: Antineoplásicos Fitogênicos/química
Chalconas/isolamento & purificação
Cumarínicos/isolamento & purificação
Digitaria/química
[Mh] Termos MeSH secundário: Alquilação
Antineoplásicos Fitogênicos/isolamento & purificação
Antineoplásicos Fitogênicos/farmacologia
Linhagem Celular Tumoral
Chalconas/química
Chalconas/farmacologia
Cumarínicos/farmacologia
Seres Humanos
Concentração Inibidora 50
Estrutura Molecular
Análise Espectral
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Antineoplastic Agents, Phytogenic); 0 (Chalcones); 0 (Coumarins)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170822
[Lr] Data última revisão:
170822
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170404
[St] Status:MEDLINE
[do] DOI:10.1002/cbdv.201700076


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[PMID]:28285205
[Au] Autor:Xiao R; Wang S; Li R; Wang JJ; Zhang Z
[Ad] Endereço:College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China; School of Plant, Environmental and Soil Sciences, Louisiana State University AgCenter, Baton Rouge, LA 70803, USA. Electronic address: xiaoran0012@gmail.com.
[Ti] Título:Soil heavy metal contamination and health risks associated with artisanal gold mining in Tongguan, Shaanxi, China.
[So] Source:Ecotoxicol Environ Saf;141:17-24, 2017 Jul.
[Is] ISSN:1090-2414
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Soil contamination with heavy metals due to mining activities poses risks to ecological safety and human well-being. Limited studies have investigated heavy metal pollution due to artisanal mining. The present study focused on soil contamination and the health risk in villages in China with historical artisanal mining activities. Heavy metal levels in soils, tailings, cereal and vegetable crops were analyzed and health risk assessed. Additionally, a botany investigation was conducted to identify potential plants for further phytoremediation. The results showed that soils were highly contaminated by residual tailings and previous mining activities. Hg and Cd were the main pollutants in soils. The Hg and Pb concentrations in grains and some vegetables exceeded tolerance limits. Moreover, heavy metal contents in wheat grains were higher than those in maize grains, and leafy vegetables had high concentrations of metals. Ingestion of local grain-based food was the main sources of Hg, Cd, and Pb intake. Local residents had high chronic risks due to the intake of Hg and Pb, while their carcinogenic risk associated with Cd through inhalation was low. Three plants (Erigeron canadensis L., Digitaria ciliaris (Retz.) Koel., and Solanum nigrum L.) were identified as suitable species for phytoremediation.
[Mh] Termos MeSH primário: Produtos Agrícolas/crescimento & desenvolvimento
Monitoramento Ambiental/métodos
Ouro
Metais Pesados/análise
Mineração
Poluentes do Solo/análise
[Mh] Termos MeSH secundário: Biodegradação Ambiental
China
Digitaria/crescimento & desenvolvimento
Erigeron/crescimento & desenvolvimento
Contaminação de Alimentos/análise
Contaminação de Alimentos/prevenção & controle
Seres Humanos
Medição de Risco
Solo/química
Solo/normas
Solanum/crescimento & desenvolvimento
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Metals, Heavy); 0 (Soil); 0 (Soil Pollutants); 7440-57-5 (Gold)
[Em] Mês de entrada:1707
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170313
[St] Status:MEDLINE


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[PMID]:27990574
[Au] Autor:Romanowska E; Buczynska A; Wasilewska W; Krupnik T; Drozak A; Rogowski P; Parys E; Zienkiewicz M
[Ad] Endereço:Department of Molecular Plant Physiology, Faculty of BiologyUniversity of Warsaw, Miecznikowa 1, 02-096, Warsaw, Poland. romanela@biol.uw.edu.pl.
[Ti] Título:Differences in photosynthetic responses of NADP-ME type C4 species to high light.
[So] Source:Planta;245(3):641-657, 2017 Mar.
[Is] ISSN:1432-2048
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:MAIN CONCLUSION: Three species chosen as representatives of NADP-ME C4 subtype exhibit different sensitivity toward photoinhibition, and great photochemical differences were found to exist between the species. These characteristics might be due to the imbalance in the excitation energy between the photosystems present in M and BS cells, and also due to that between species caused by the penetration of light inside the leaves. Such regulation in the distribution of light intensity between M and BS cells shows that co-operation between both the metabolic systems determines effective photosynthesis and reduces the harmful effects of high light on the degradation of PSII through the production of reactive oxygen species (ROS). We have investigated several physiological parameters of NADP-ME-type C4 species (e.g., Zea mays, Echinochloa crus-galli, and Digitaria sanguinalis) grown under moderate light intensity (200 µmol photons m s ) and, subsequently, exposed to excess light intensity (HL, 1600 µmol photons m s ). Our main interest was to understand why these species, grown under identical conditions, differ in their responses toward high light, and what is the physiological significance of these differences. Among the investigated species, Echinochloa crus-galli is best adapted to HL treatment. High resistance of the photosynthetic apparatus of E. crus-galli to HL was accompanied by an elevated level of phosphorylation of PSII proteins, and higher values of photochemical quenching, ATP/ADP ratio, activity of PSI and PSII complexes, as well as integrity of the thylakoid membranes. It was also shown that the non-radiative dissipation of energy in the studied plants was not dependent on carotenoid contents and, thus, other photoprotective mechanisms might have been engaged under HL stress conditions. The activity of the enzymes superoxide dismutase and ascorbate peroxidase as well as the content of malondialdehyde and H O suggests that antioxidant defense is not responsible for the differences observed in the tolerance of NADP-ME species toward HL stress. We concluded that the chloroplasts of the examined NADP-ME species showed different sensitivity to short-term high light irradiance, suggesting a role of other factors excluding light factors, thus influencing the response of thylakoid proteins. We also observed that HL affects the mesophyll chloroplasts first hand and, subsequently, the bundle sheath chloroplasts.
[Mh] Termos MeSH primário: Digitaria/fisiologia
Echinochloa/fisiologia
Luz
Malato Desidrogenase/metabolismo
Fotossíntese/efeitos da radiação
Zea mays/fisiologia
[Mh] Termos MeSH secundário: Difosfato de Adenosina/metabolismo
Trifosfato de Adenosina/metabolismo
Transporte Biológico/efeitos da radiação
Carotenoides/metabolismo
Respiração Celular/efeitos da radiação
Clorofila/metabolismo
Digitaria/enzimologia
Digitaria/efeitos da radiação
Echinochloa/enzimologia
Echinochloa/efeitos da radiação
Transporte de Elétrons/efeitos da radiação
Eletroforese em Gel de Poliacrilamida
Fluorescência
Peróxido de Hidrogênio/metabolismo
Malondialdeído/metabolismo
Células do Mesofilo/metabolismo
Células do Mesofilo/efeitos da radiação
Metaboloma
Fosforilação/efeitos da radiação
Complexo de Proteína do Fotossistema I/metabolismo
Complexo de Proteína do Fotossistema II/metabolismo
Folhas de Planta/efeitos da radiação
Tilacoides/metabolismo
Tilacoides/efeitos da radiação
Zea mays/enzimologia
Zea mays/efeitos da radiação
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Photosystem I Protein Complex); 0 (Photosystem II Protein Complex); 1406-65-1 (Chlorophyll); 36-88-4 (Carotenoids); 4Y8F71G49Q (Malondialdehyde); 61D2G4IYVH (Adenosine Diphosphate); 8L70Q75FXE (Adenosine Triphosphate); BBX060AN9V (Hydrogen Peroxide); EC 1.1.1.37 (Malate Dehydrogenase); EC 1.1.1.40 (malate dehydrogenase (oxaloacetate-decarboxylating) (NADP+)); YF5Q9EJC8Y (chlorophyll a)
[Em] Mês de entrada:1705
[Cu] Atualização por classe:170501
[Lr] Data última revisão:
170501
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161220
[St] Status:MEDLINE
[do] DOI:10.1007/s00425-016-2632-1


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[PMID]:27525929
[Au] Autor:Galeano E; Barroso AA; Vasconcelos TS; López-Rubio A; Albrecht AJ; Victoria Filho R; Carrer H
[Ad] Endereço:Departamento de Ciências Biológicas, Escola Superior de Agricultura "Luiz de Queiroz", Universidade de São Paulo, Piracicaba, SP, Brasil estebangg18@hotmail.com.
[Ti] Título:EPSPS variability, gene expression, and enzymatic activity in glyphosate-resistant biotypes of Digitaria insularis.
[So] Source:Genet Mol Res;15(3), 2016 Aug 12.
[Is] ISSN:1676-5680
[Cp] País de publicação:Brazil
[La] Idioma:eng
[Ab] Resumo:Weed resistance to herbicides is a natural phenomenon that exerts selection on individuals in a population. In Brazil, glyphosate resistance was recently detected in Digitaria insularis. The objective of this study was to elucidate mechanisms of weed resistance in this plant, including genetic variability, allelism, amino acid substitutions, gene expression, and enzymatic activity levels. Most of these have not previously been studied in this species. D. insularis DNA sequences were used to analyze genetic variability. cDNA from resistant and susceptible plants was used to identify mutations, alleles, and 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) expression, using real-time quantitative reverse transcription-polymerase chain reaction. In addition, EPSPS activity was measured. We found a decrease in genetic variability between populations related to glyphosate application. Substitutions from proline to threonine and tyrosine to cysteine led to a decrease in EPSPS affinity for the glyphosate. In addition, the EPSPS enzymatic activity was slightly higher in resistant plants, whereas EPSPS gene expression was almost identical in both biotypes, suggesting feedback regulation at different levels. To conclude, our results suggest new molecular mechanisms used by D. insularis to increase glyphosate resistance.
[Mh] Termos MeSH primário: 3-Fosfoshikimato 1-Carboxiviniltransferase/genética
Digitaria/enzimologia
Glicina/análogos & derivados
Herbicidas/farmacologia
Proteínas de Plantas/genética
[Mh] Termos MeSH secundário: 3-Fosfoshikimato 1-Carboxiviniltransferase/metabolismo
Substituição de Aminoácidos
Digitaria/efeitos dos fármacos
Digitaria/genética
Expressão Gênica
Glicina/farmacologia
Resistência a Herbicidas
Filogenia
Proteínas de Plantas/metabolismo
Polimorfismo Genético
Análise de Sequência de DNA
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Herbicides); 0 (Plant Proteins); 4632WW1X5A (glyphosate); EC 2.5.1.19 (3-Phosphoshikimate 1-Carboxyvinyltransferase); TE7660XO1C (Glycine)
[Em] Mês de entrada:1702
[Cu] Atualização por classe:170224
[Lr] Data última revisão:
170224
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160816
[St] Status:MEDLINE
[do] DOI:10.4238/gmr.15038730


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[PMID]:26786699
[Au] Autor:Che JY; Xu XY; Tang ZL; Gu YC; Shi DQ
[Ad] Endereço:Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, People's Republic of China.
[Ti] Título:Synthesis and herbicidal activity evaluation of novel α-amino phosphonate derivatives containing a uracil moiety.
[So] Source:Bioorg Med Chem Lett;26(4):1310-3, 2016 Feb 15.
[Is] ISSN:1464-3405
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A series of novel α-amino phosphonate derivatives containing a uracil moiety 3a-3l were designed and synthesized by a Lewis acid (magnesium perchlorate) catalyzed the Kabachnik-Fields reaction. The bioassays {in vitro, in vivo [Glass House 1 (GH1) and Glass House 2 (GH2)]} showed that most of compounds 3 exhibited excellent and selective herbicidal activities; for example, in GH1 test, compounds 3b, 3d, 3f, 3h and 3j showed excellent and wide spectrum herbicidal activities at the dose of 1000 g/ha, and compounds 3b and 3j exhibited 100% inhibition activities against the four plants in both post- and pre-emergence treatments. Moreover, most of compounds 3 showed higher inhibition against Amaranthus retroflexus and Digitaria sanguinalis than Glyphosate did in pre-emergence treatment. In GH2 test, the four compounds (3b, 3d, 3h and 3j) exhibited 100% inhibition against Solanum nigrum, Amaranthus retroflexus and Ipomoea hederacea in post-emergence treatment and displayed 100% inhibition against Solanum nigrum, Amaranthus retroflexus in pre-emergence treatment at the rate of 250 g/ha, and compound 3b showed the best and broad spectrum herbicidal activities against the six test plants. However, the four compounds displayed weaker herbicidal activities against Lolium perenne and Echinochloa crus-galli than the other four plants at the rate of 250 g/ha in both pre- and post-emergence treatments. So, compounds 3 can be used as a lead compound for further structure optimization for developing potential selective herbicidal agent. Their preliminary structure-activity relationships were also investigated.
[Mh] Termos MeSH primário: Herbicidas/síntese química
Ácidos Fosforosos/química
Uracila/química
[Mh] Termos MeSH secundário: Amaranthus/efeitos dos fármacos
Digitaria/efeitos dos fármacos
Glicina/análogos & derivados
Glicina/toxicidade
Herbicidas/química
Herbicidas/toxicidade
Ipomoea/efeitos dos fármacos
Ácidos Fosforosos/síntese química
Ácidos Fosforosos/toxicidade
Solanum nigrum/efeitos dos fármacos
Relação Estrutura-Atividade
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Herbicides); 0 (Phosphorous Acids); 13598-36-2 (phosphonic acid); 4632WW1X5A (glyphosate); 56HH86ZVCT (Uracil); TE7660XO1C (Glycine)
[Em] Mês de entrada:1609
[Cu] Atualização por classe:160209
[Lr] Data última revisão:
160209
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160121
[St] Status:MEDLINE


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[PMID]:26184604
[Au] Autor:Pedranzani H; Rodríguez-Rivera M; Gutiérrez M; Porcel R; Hause B; Ruiz-Lozano JM
[Ad] Endereço:Laboratorio de Fisiología Vegetal. Facultad de Química Bioquímica y Farmacia, Universidad Nacional de San Luis, Ejército de los Andes 950, 5700, San Luis, Argentina. hepedra@unsl.edu.ar.
[Ti] Título:Arbuscular mycorrhizal symbiosis regulates physiology and performance of Digitaria eriantha plants subjected to abiotic stresses by modulating antioxidant and jasmonate levels.
[So] Source:Mycorrhiza;26(2):141-52, 2016 Feb.
[Is] ISSN:1432-1890
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:This study evaluates antioxidant responses and jasmonate regulation in Digitaria eriantha cv. Sudafricana plants inoculated (AM) and non-inoculated (non-AM) with Rhizophagus irregularis and subjected to drought, cold, or salinity. Stomatal conductance, photosynthetic efficiency, biomass production, hydrogen peroxide accumulation, lipid peroxidation, antioxidants enzymes activities, and jasmonate levels were determined. Stomatal conductance and photosynthetic efficiency decreased in AM and non-AM plants under all stress conditions. However, AM plants subjected to drought, salinity, or non-stress conditions showed significantly higher stomatal conductance values. AM plants subjected to drought or non-stress conditions increased their shoot/root biomass ratios, whereas salinity and cold caused a decrease in these ratios. Hydrogen peroxide accumulation, which was high in non-AM plant roots under all treatments, increased significantly in non-AM plant shoots under cold stress and in AM plants under non-stress and drought conditions. Lipid peroxidation increased in the roots of all plants under drought conditions. In shoots, although lipid peroxidation decreased in AM plants under non-stress and cold conditions, it increased under drought and salinity. AM plants consistently showed high catalase (CAT) and ascorbate peroxidase (APX) activity under all treatments. By contrast, the glutathione reductase (GR) and superoxide dismutase (SOD) activity of AM roots was lower than that of non-AM plants and increased in shoots. The endogenous levels of cis-12-oxophytodienoc acid (OPDA), jasmonic acid (JA), and 12-OH-JA showed a significant increase in AM plants as compared to non-AM plants. 11-OH-JA content only increased in AM plants subjected to drought. Results show that D. eriantha is sensitive to drought, salinity, and cold stresses and that inoculation with AM fungi regulates its physiology and performance under such conditions, with antioxidants and jasmonates being involved in this process.
[Mh] Termos MeSH primário: Antioxidantes/metabolismo
Ciclopentanos/metabolismo
Digitaria/microbiologia
Glomeromycota/fisiologia
Micorrizas/fisiologia
Oxilipinas/metabolismo
Estresse Fisiológico
Simbiose
[Mh] Termos MeSH secundário: Temperatura Baixa
Digitaria/fisiologia
Secas
Salinidade
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Antioxidants); 0 (Cyclopentanes); 0 (Oxylipins); 6RI5N05OWW (jasmonic acid)
[Em] Mês de entrada:1610
[Cu] Atualização por classe:171011
[Lr] Data última revisão:
171011
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150718
[St] Status:MEDLINE
[do] DOI:10.1007/s00572-015-0653-4


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[PMID]:26454013
[Au] Autor:Chiapello H; Mallet L; Guérin C; Aguileta G; Amselem J; Kroj T; Ortega-Abboud E; Lebrun MH; Henrissat B; Gendrault A; Rodolphe F; Tharreau D; Fournier E
[Ad] Endereço:INRA, UR 1404, Unité Mathématiques et Informatique Appliquées du Génome à l'Environnement, Jouy-en-Josas, France INRA, UR 875, Unité Mathématiques et Informatique Appliquées de Toulouse, Castanet-Tolosan, France helene.chiapello@toulouse.inra.fr elisabeth.fournier@supagro.inra.fr.
[Ti] Título:Deciphering Genome Content and Evolutionary Relationships of Isolates from the Fungus Magnaporthe oryzae Attacking Different Host Plants.
[So] Source:Genome Biol Evol;7(10):2896-912, 2015 Oct 09.
[Is] ISSN:1759-6653
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Deciphering the genetic bases of pathogen adaptation to its host is a key question in ecology and evolution. To understand how the fungus Magnaporthe oryzae adapts to different plants, we sequenced eight M. oryzae isolates differing in host specificity (rice, foxtail millet, wheat, and goosegrass), and one Magnaporthe grisea isolate specific of crabgrass. Analysis of Magnaporthe genomes revealed small variation in genome sizes (39-43 Mb) and gene content (12,283-14,781 genes) between isolates. The whole set of Magnaporthe genes comprised 14,966 shared families, 63% of which included genes present in all the nine M. oryzae genomes. The evolutionary relationships among Magnaporthe isolates were inferred using 6,878 single-copy orthologs. The resulting genealogy was mostly bifurcating among the different host-specific lineages, but was reticulate inside the rice lineage. We detected traces of introgression from a nonrice genome in the rice reference 70-15 genome. Among M. oryzae isolates and host-specific lineages, the genome composition in terms of frequencies of genes putatively involved in pathogenicity (effectors, secondary metabolism, cazome) was conserved. However, 529 shared families were found only in nonrice lineages, whereas the rice lineage possessed 86 specific families absent from the nonrice genomes. Our results confirmed that the host specificity of M. oryzae isolates was associated with a divergence between lineages without major gene flow and that, despite the strong conservation of gene families between lineages, adaptation to different hosts, especially to rice, was associated with the presence of a small number of specific gene families. All information was gathered in a public database (http://genome.jouy.inra.fr/gemo).
[Mh] Termos MeSH primário: Evolução Molecular
Genoma Fúngico
Magnaporthe/genética
[Mh] Termos MeSH secundário: Adaptação Biológica
Sequência de Bases
Evolução Biológica
Burkholderia/genética
Burkholderia/isolamento & purificação
Elementos de DNA Transponíveis
Digitaria/microbiologia
Proteínas Fúngicas/genética
Genes Fúngicos
Variação Genética
Magnaporthe/isolamento & purificação
Oryza/microbiologia
Doenças das Plantas/microbiologia
Análise de Sequência de DNA
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (DNA Transposable Elements); 0 (Fungal Proteins)
[Em] Mês de entrada:1607
[Cu] Atualização por classe:170220
[Lr] Data última revisão:
170220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:151011
[St] Status:MEDLINE
[do] DOI:10.1093/gbe/evv187


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[PMID]:25660884
[Au] Autor:Arueya GL; Oyewale TM
[Ad] Endereço:Department of Food Technology, University of Ibadan, Ibadan, Nigeria. Electronic address: arueyagibson@yahoo.com.
[Ti] Título:Effect of varying degrees of succinylation on the functional and morphological properties of starch from acha (Digitaria exilis Kippis Stapf).
[So] Source:Food Chem;177:258-66, 2015 Jun 15.
[Is] ISSN:0308-8146
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Scientific data on the effect of varying degrees of succinylation on starch from Acha, an underutilized source is scanty. Bridging this gap is the focus of this study. Acha starch was extracted, succinylated (succinic anhydride (SA) (3-14 g/100g starch) and the degree of substitution determined. Proximate composition and functional characteristics of both native and succinylated starches were evaluated according to standard methods. Starch spectra and morphology were also studied. Succinylation increased (5.63-11.68%) with increasing concentration of SA. Amylose peaked at 36.42% and thereafter decreased to 28.84%. Swelling power and solubility increased in multiple folds especially at temperatures (70-90°C) at all levels of substitution (0.1-0.20). Pasting viscosities (165.9-307.5 RVU) decreased and did not follow the order of substitution. Morphology (polygonal) and granular sizes (6-12 µm) among the succinylated and native starches were not significantly different (P<0.05). Succinylated Acha starches hold great promise as a good and cheaper replacement for gums in Food Applications.
[Mh] Termos MeSH primário: Digitaria/química
Amido/química
Anidridos Succínicos/química
[Mh] Termos MeSH secundário: Amilose/química
Alimentos Fortificados
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Succinic Anhydrides); 6RF4O17Z8J (succinic anhydride); 9005-25-8 (Starch); 9005-82-7 (Amylose)
[Em] Mês de entrada:1509
[Cu] Atualização por classe:150209
[Lr] Data última revisão:
150209
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150210
[St] Status:MEDLINE


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[PMID]:24990686
[Au] Autor:Verdú AM; Mas MT
[Ad] Endereço:Departament d'Enginyeria Agroalimentària i Biotecnologia (DEAB), Escola Superior d'Agricultura de Barcelona (ESAB), Universitat Politècnica de Catalunya (UPC), Castelldefels, Barcelona, Spain.
[Ti] Título:Density-related effects on the infectivity and aggressiveness of a sterilising smut in a wild population of Digitaria sanguinalis.
[So] Source:Plant Biol (Stuttg);17(1):281-7, 2015 Jan.
[Is] ISSN:1438-8677
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Understanding host-pathogen evolutionary dynamics needs characterisation and quantification of processes occurring at many spatiotemporal scales. With this aim, the effects of smut on a naturally infected population of the summer annual Digitaria sanguinalis were followed for 4 years in an uncropped field. The main purpose of the study was to quantify the effects of within-population density on the infectivity and the aggressiveness of the pathogen in a range of densities that occurred naturally. The infectivity-related variable measured was the proportion of smutted plants at the end of each growing season; proportions were analysed using a generalised linear model with a binomial distribution considering the year, the density and their interaction as effects. The aggressiveness-related variables chosen were the number of smutted inflorescences per plant and per area, obtained over the last 2 years; they were analysed by means of ancova considering disease status (seeded or smutted), year, density and all the interactions between them. Although the disease is monocyclic, results showed clearly that infectivity increased with plant density. The number of inflorescences per plant was 1.5 times higher in smutted plants than in healthy plants throughout the range of densities. This variable declined when density increased, but as the infectivity increased at a higher rate, the aggressiveness also increased with density. The surprising results on infectivity are discussed in the context of current knowledge of plant-pathogen interaction dynamics, as well as neighbour effects on pathogen aggressiveness. Moreover, the results could be useful to develop weed biological control strategies.
[Mh] Termos MeSH primário: Digitaria/microbiologia
Interações Hospedeiro-Patógeno
Doenças das Plantas/microbiologia
Ustilago/fisiologia
[Mh] Termos MeSH secundário: Evolução Biológica
Modelos Lineares
Plantas Daninhas
Estações do Ano
Ustilago/patogenicidade
Virulência
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1605
[Cu] Atualização por classe:150113
[Lr] Data última revisão:
150113
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140704
[St] Status:MEDLINE
[do] DOI:10.1111/plb.12210



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