Base de dados : MEDLINE Pesquisa : B01.650.940.800.575.912.250.198.500.984 [Categoria DeCS] Referências encontradas : 22 [refinar] Mostrando: 1 .. 10   no formato [Detalhado]

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[PMID]: 27028188 [Au] Autor: Fernández-Arhex V; Amadio ME; Bruzzone OA [Ad] Endereço: Instituto Nacional de Tecnología Agropecuaria, Estación Experimental Agropecuaria-Bariloche, CC277, Av, Modesta Victoria 4450 (8400), San Carlos de Bariloche, Argentina. [Ti] Título: Cumulative effects of volcanic ash on the food preferences of two Orthopteran species. [So] Source: Insect Sci;24(4):640-646, 2017 Aug. [Is] ISSN: 1744-7917 [Cp] País de publicação: Australia [La] Idioma: eng [Ab] Resumo: Inert dusts are an early form of insecticide which is still in use. One of the most common inert dusts is volcanic ash. In order to study the reaction of rangeland grasshoppers, Dichroplus vittigerum (Acrididae) and a katydid, Burgilis mendosensis (Phaneropteridae), to the presence of volcanic ash in their food sources and how this reaction changed as a function of time, we conducted paired preference tests between clean leaves of their preferred host plant and leaves exposed to volcanic ash of different grain size. The behavioral response was measured as the rating on the Thurstonian preference scale of leaves with ash in relation to clean leaves. The results showed that the avoidance of volcanic ash increased as a function of time in both species. Both species studied are occasionally exposed to volcanic activity, and come from an area in which a volcanic eruption had recently occurred. As their populations did not decrease after the ash fall, we propose that some behavioral responses such as avoidance of places with ash, works as tolerance mechanism to inert dusts exposure. [Mh] Termos MeSH primário: Preferências Alimentares Gafanhotos/fisiologia Tamanho da Partícula Erupções Vulcânicas/efeitos adversos [Mh] Termos MeSH secundário: Animais Argentina Folhas de Planta Portulacaceae Taraxacum Fatores de Tempo [Pt] Tipo de publicação: JOURNAL ARTICLE [Em] Mês de entrada: 1709 [Cu] Atualização por classe: 170925 [Lr] Data última revisão: 170925 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 160331 [St] Status: MEDLINE [do] DOI: 10.1111/1744-7917.12338

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[PMID]: 26833694 [Au] Autor: Gezon ZJ; Inouye DW; Irwin RE [Ad] Endereço: Department of Biological Sciences, Dartmouth College, 78 College St, Hanover, NH, 03755, USA. [Ti] Título: Phenological change in a spring ephemeral: implications for pollination and plant reproduction. [So] Source: Glob Chang Biol;22(5):1779-93, 2016 May. [Is] ISSN: 1365-2486 [Cp] País de publicação: England [La] Idioma: eng [Ab] Resumo: Climate change has had numerous ecological effects, including species range shifts and altered phenology. Altering flowering phenology often affects plant reproduction, but the mechanisms behind these changes are not well-understood. To investigate why altering flowering phenology affects plant reproduction, we manipulated flowering phenology of the spring herb Claytonia lanceolata (Portulacaceae) using two methods: in 2011-2013 by altering snow pack (snow-removal vs. control treatments), and in 2013 by inducing flowering in a greenhouse before placing plants in experimental outdoor arrays (early, control, and late treatments). We measured flowering phenology, pollinator visitation, plant reproduction (fruit and seed set), and pollen limitation. Flowering occurred approx. 10 days earlier in snow-removal than control plots during all years of snow manipulation. Pollinator visitation patterns and strength of pollen limitation varied with snow treatments, and among years. Plants in the snow removal treatment were more likely to experience frost damage, and frost-damaged plants suffered low reproduction despite lack of pollen limitation. Plants in the snow removal treatment that escaped frost damage had higher pollinator visitation rates and reproduction than controls. The results of the array experiment supported the results of the snow manipulations. Plants in the early and late treatments suffered very low reproduction due either to severe frost damage (early treatment) or low pollinator visitation (late treatment) relative to control plants. Thus, plants face tradeoffs with advanced flowering time. While early-flowering plants can reap the benefits of enhanced pollination services, they do so at the cost of increased susceptibility to frost damage that can overwhelm any benefit of flowering early. In contrast, delayed flowering results in dramatic reductions in plant reproduction through reduced pollination. Our results suggest that climate change may constrain the success of early-flowering plants not through plant-pollinator mismatch but through the direct impacts of extreme environmental conditions. [Mh] Termos MeSH primário: Polinização Portulacaceae/fisiologia [Mh] Termos MeSH secundário: Mudança Climática Colorado Flores/crescimento & desenvolvimento Flores/fisiologia Portulacaceae/crescimento & desenvolvimento Reprodução Estações do Ano [Pt] Tipo de publicação: JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S. [Em] Mês de entrada: 1612 [Cu] Atualização por classe: 161230 [Lr] Data última revisão: 161230 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 160203 [St] Status: MEDLINE [do] DOI: 10.1111/gcb.13209

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[PMID]: 26773210 [Au] Autor: Umeokoli BO; Muharini R; Okoye FB; Ajiwe VI; Akpuaka MU; Lin W; Liu Z; Proksch P [Ad] Endereço: Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine-Universität Düsseldorf, Universitätsstrasse 1, 40225 Düsseldorf, Germany; Department of Pharmaceutical and Medicinal Chemistry, Nnamdi Azikiwe University, Awka, Nigeria. [Ti] Título: New C-methylated flavonoids and α-pyrone derivative from roots of Talinum triangulare growing in Nigeria. [So] Source: Fitoterapia;109:169-73, 2016 Mar. [Is] ISSN: 1873-6971 [Cp] País de publicação: Netherlands [La] Idioma: eng [Ab] Resumo: The first chemical examination of roots of the traditionally used medicinal plant Talinum triangulare (Portulacaceae) from Nigeria led to the isolation of two new C-methylated flavonoids, 5,6-dimethoxy-7-hydroxy-8-methyl-flavone (1), 5,6-dimethoxy-8-methyl-2-phenyl-7H-1-benzopyran-7-one (2), and one new α-pyrone derivative, 4-methoxy-6-(2-hydroxy-4-phenylbutyl)-2H-pyran-2-one (3), along with thirteen known compounds, including nine amides (4-12), indole-3-carboxylic acid (13), p-hydroxy benzoic acid (14), and two steroids (15-16). Their structures were elucidated by extensive spectroscopic measurements including 1D, 2D NMR, MS, and by comparison with the literature. All isolated compounds were screened for their cytotoxic and antifungal activities. However, none of them showed significant activity. [Mh] Termos MeSH primário: Flavonoides/química Raízes de Plantas/química Portulacaceae/química Pironas/química [Mh] Termos MeSH secundário: Animais Linhagem Celular Tumoral Flavonoides/isolamento & purificação Camundongos Estrutura Molecular Nigéria Plantas Medicinais/química Pironas/isolamento & purificação [Pt] Tipo de publicação: JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T [Nm] Nome de substância: 0 (Flavonoids); 0 (Pyrones) [Em] Mês de entrada: 1607 [Cu] Atualização por classe: 160301 [Lr] Data última revisão: 160301 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 160117 [St] Status: MEDLINE

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[PMID]: 25728390 [Au] Autor: Lai HR; Mayfield MM; Gay-des-Combes JM; Spiegelberger T; Dwyer JM [Ad] Endereço: School of Biological Sciences, The University of Queensland, Brisbane, Queensland, 4072, Australia. [Ti] Título: Distinct invasion strategies operating within a natural annual plant system. [So] Source: Ecol Lett;18(4):336-46, 2015 Apr. [Is] ISSN: 1461-0248 [Cp] País de publicação: England [La] Idioma: eng [Ab] Resumo: Alien plant species are known to have a wide range of impacts on recipient communities, from resident species' exclusions to coexistence with resident species. It remains unclear; however, if this variety of impacts is due to different invader strategies, features of recipient communities or both. To test this, we examined multiple plant invasions of a single ecosystem in southwestern Australia. We used extensive community data to calculate pairwise segregation between target alien species and many co-occurring species. We related segregation to species' positions along community trait hierarchies and identified at least two distinct invasion strategies: 'exploiters' which occupy high positions along key trait hierarchies and reduce local native species diversity (particularly in nutrient-enriched situations), and 'coexisters' who occupy intermediate trait positions and have no discernable impact on native diversity. We conclude that trait hierarchies, linked to measures of competition, can provide valuable insights about the processes driving different invasion outcomes. [Mh] Termos MeSH primário: Biodiversidade Ecossistema Espécies Introduzidas Plantas/classificação Característica Quantitativa Herdável [Mh] Termos MeSH secundário: Araliaceae/fisiologia Asteraceae/fisiologia Modelos Biológicos Poaceae/fisiologia Portulacaceae/fisiologia Scrophulariaceae/fisiologia Austrália Ocidental [Pt] Tipo de publicação: JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T [Em] Mês de entrada: 1511 [Cu] Atualização por classe: 150324 [Lr] Data última revisão: 150324 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 150303 [St] Status: MEDLINE [do] DOI: 10.1111/ele.12414

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[PMID]: 24799228 [Au] Autor: de Oliveira Amorim AP; de Carvalho AR; Lopes NP; Castro RN; de Oliveira MC; de Carvalho MG [Ad] Endereço: Departamento de Química, ICE, Universidade Federal Rural do Rio de Janeiro, BR 465 KM 07, 23890-000 Seropédica, RJ, Brazil. Electronic address: anamorim07@hotmail.com. [Ti] Título: Chemical compounds isolated from Talinum triangulare (Portulacaceae). [So] Source: Food Chem;160:204-8, 2014 Oct 01. [Is] ISSN: 0308-8146 [Cp] País de publicação: England [La] Idioma: eng [Ab] Resumo: This first phytochemical study of Talinum triangulare Leach (Portulacaceae), also known as 'cariru', which is a commonly consumed food in Northern Brazil, allowed the isolation and structural determination of four new compounds: one acrylamide, 3-N-(acryloyl, N-pentadecanoyl) propanoic acid (5), and three new phaeophytins named (15(1)S, 17R, 18R)-Ficuschlorin D acid (3(1),3(2)-didehydro-7-oxo-17(3)-O-phytyl-rhodochlorin-15-acetic acid), (13), Talichorin A (17R, 18R)-phaeophytin b-15(1)-hidroxy, 15(2),15(3)-acetyl-13(1)-carboxilic acid (14), and (15(1)S, 17R, 18R)-phaeophytin b peroxylactone or (15(1)S, 17R, 18R)-hydroperoxy-ficuschlorin D (16), together with twelve known compounds, including four phaeophytins (11,12, 15 and 17). The structures of the compounds were established on the basis of 1D and 2D NMR, IR, HRESI-MS spectra, including GC-MS, and HPLC-UV analysis, as well as comparisons with the literature data. The CD spectra data analysis were used to define the absolute configuration of phaeophytins 12 (13(2)R, 17R, 18R)-13(2)-hydroxyphaeophytin a, 13 and 16, 15 (15(1)S, 17R, 18R)-3(1),3(2)-didehydro-15(1)-hydroxyrhodochlorin-15-acetic acid δ-lactone-15(2)-methyl-17(3)-phytyl ester and 17 (17R, 18R)-purpurin 18-phytyl ester. [Mh] Termos MeSH primário: Compostos Fitoquímicos/análise Portulacaceae/química [Mh] Termos MeSH secundário: Brasil Clorofila/análise Cromatografia Líquida de Alta Pressão Dicroísmo Circular Cromatografia Gasosa-Espectrometria de Massas Espectroscopia de Ressonância Magnética Magnoliopsida Compostos Fitoquímicos/isolamento & purificação Extratos Vegetais/química Folhas de Planta/química Caules de Planta/química Espectrometria de Massas por Ionização por Electrospray [Pt] Tipo de publicação: JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T [Nm] Nome de substância: 0 (Phytochemicals); 0 (Plant Extracts); 1406-65-1 (Chlorophyll) [Em] Mês de entrada: 1511 [Cu] Atualização por classe: 171116 [Lr] Data última revisão: 171116 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 140507 [St] Status: MEDLINE

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[PMID]: 24705950 [Au] Autor: Kumar A; Majeti NV [Ad] Endereço: Department of Plant Sciences, University of Hyderabad, Hyderabad, 500046, India, kkumar.abhay@gmail.com. [Ti] Título: Proteomic responses to lead-induced oxidative stress in Talinum triangulare Jacq. (Willd.) roots: identification of key biomarkers related to glutathione metabolisms. [So] Source: Environ Sci Pollut Res Int;21(14):8750-64, 2014. [Is] ISSN: 1614-7499 [Cp] País de publicação: Germany [La] Idioma: eng [Ab] Resumo: In this study, Talinum triangulare Jacq. (Willd.) treated with different lead (Pb) concentrations for 7 days has been investigated to understand the mechanisms of ascorbate-glutathione metabolisms in response to Pb-induced oxidative stress. Proteomic study was performed for control and 1.25 mM Pb-treated plants to examine the root protein dynamics in the presence of Pb. Results of our analysis showed that Pb treatment caused a decrease in non-protein thiols, reduced glutathione (GSH), total ascorbate, total glutathione, GSH/oxidized glutathione (GSSG) ratio, and activities of glutathione reductase and γ-glutamylcysteine synthetase. Conversely, cysteine and GSSG contents and glutathione-S-transferase activity was increased after Pb treatment. Fourier transform infrared spectroscopy confirmed our metabolic and proteomic studies and showed that amino, phenolic, and carboxylic acids as well as alcoholic, amide, and ester-containing biomolecules had key roles in detoxification of Pb/Pb-induced toxic metabolites. Proteomic analysis revealed an increase in relative abundance of 20 major proteins and 3 new proteins (appeared only in 1.25 mM Pb). Abundant proteins during 1.25 mM Pb stress conditions have given a very clear indication about their involvement in root architecture, energy metabolism, reactive oxygen species (ROS) detoxification, cell signaling, primary and secondary metabolisms, and molecular transport systems. Relative accumulation patterns of both common and newly identified proteins are highly correlated with our other morphological, physiological, and biochemical parameters. [Mh] Termos MeSH primário: Ácido Ascórbico/metabolismo Glutationa/metabolismo Chumbo/toxicidade Proteínas de Plantas/metabolismo Portulacaceae/efeitos dos fármacos [Mh] Termos MeSH secundário: Biomarcadores/metabolismo Cisteína/metabolismo Eletroforese em Gel Bidimensional Glutationa Redutase/metabolismo Magnoliopsida/metabolismo Estresse Oxidativo/efeitos dos fármacos Raízes de Plantas/efeitos dos fármacos Raízes de Plantas/metabolismo Plantas/metabolismo Portulacaceae/metabolismo Proteínas/metabolismo Proteômica Espécies Reativas de Oxigênio/metabolismo Espectroscopia de Infravermelho com Transformada de Fourier Estresse Fisiológico Compostos de Sulfidrila/metabolismo [Pt] Tipo de publicação: JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T [Nm] Nome de substância: 0 (Biomarkers); 0 (Plant Proteins); 0 (Proteins); 0 (Reactive Oxygen Species); 0 (Sulfhydryl Compounds); 2P299V784P (Lead); EC 1.8.1.7 (Glutathione Reductase); GAN16C9B8O (Glutathione); K848JZ4886 (Cysteine); PQ6CK8PD0R (Ascorbic Acid) [Em] Mês de entrada: 1506 [Cu] Atualização por classe: 171116 [Lr] Data última revisão: 171116 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 140408 [St] Status: MEDLINE [do] DOI: 10.1007/s11356-014-2808-9

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[PMID]: 24259525 [Au] Autor: Ocampo G; Koteyeva NK; Voznesenskaya EV; Edwards GE; Sage TL; Sage RF; Columbus JT [Ad] Endereço: Rancho Santa Ana Botanic Garden and Claremont Graduate University, 1500 North College Avenue, Claremont, California 91711 USA. [Ti] Título: Evolution of leaf anatomy and photosynthetic pathways in Portulacaceae. [So] Source: Am J Bot;100(12):2388-402, 2013 Dec. [Is] ISSN: 1537-2197 [Cp] País de publicação: United States [La] Idioma: eng [Ab] Resumo: PREMISE OF THE STUDY: Portulacaceae is a family with a remarkable diversity in photosynthetic pathways. This lineage not only has species with different C4 biochemistry (NADP-ME and NAD-ME types) and C3-C4 intermediacy, but also displays different leaf anatomical configurations. Here we addressed the evolutionary history of leaf anatomy and photosynthetic pathways in Portulacaceae. METHODS: Photosynthetic pathways were assessed based on leaf anatomy and carbon isotope ratios. Information on the NADP-ME and NAD-ME C4 variants was obtained from the literature. The evolutionary relationships and trait evolution were estimated under a Bayesian framework, and divergence times were calibrated using the ages obtained in a previous study. KEY RESULTS: C4 photosynthesis is the main pathway in Portulacaceae. One clade (Cryptopetala), however, includes species that have non-Kranz anatomy and C3 type isotope values, two of which are C3-C4 intermediates. The ancestral leaf anatomy for the family is uncertain. The analysis showed one origin of the C4 pathway, which was lost in the Cryptopetala clade. Nevertheless, when a second analysis was performed taking into account the limited number of species with NAD-ME and NADP-ME data, a secondary gain of the C4 pathway from a C3-C4 intermediate was inferred. CONCLUSIONS: The C4 pathway evolved ca. 23 Myr in the Portulacaceae. The number of times that the pathway evolved in the family is uncertain. The diversity of leaf anatomical types and C4 biochemical variants suggest multiple independent origins of C4 photosynthesis. Evidence for a switch from C4 to C3-C4 intermediacy supports the hypothesis that intermediates represent a distinct successful strategy. [Mh] Termos MeSH primário: Evolução Biológica Carbono/metabolismo Fotossíntese/genética Filogenia Folhas de Planta Portulacaceae/genética [Mh] Termos MeSH secundário: Teorema de Bayes Ciclo do Carbono Isótopos de Carbono/metabolismo Malatos/metabolismo NAD/genética NAD/metabolismo NADP/genética NADP/metabolismo Folhas de Planta/anatomia & histologia Folhas de Planta/fisiologia Portulacaceae/anatomia & histologia Portulacaceae/fisiologia [Pt] Tipo de publicação: JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T [Nm] Nome de substância: 0 (Carbon Isotopes); 0 (Malates); 0U46U6E8UK (NAD); 53-59-8 (NADP); 7440-44-0 (Carbon); 817L1N4CKP (malic acid) [Em] Mês de entrada: 1407 [Cu] Atualização por classe: 161128 [Lr] Data última revisão: 161128 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 131122 [St] Status: MEDLINE [do] DOI: 10.3732/ajb.1300094

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[PMID]: 23449999 [Au] Autor: Burkle LA; Marlin JC; Knight TM [Ad] Endereço: Washington University, Department of Biology, St. Louis, MO 63130, USA. laura.burkle@montana.edu [Ti] Título: Plant-pollinator interactions over 120 years: loss of species, co-occurrence, and function. [So] Source: Science;339(6127):1611-5, 2013 Mar 29. [Is] ISSN: 1095-9203 [Cp] País de publicação: United States [La] Idioma: eng [Ab] Resumo: Using historic data sets, we quantified the degree to which global change over 120 years disrupted plant-pollinator interactions in a temperate forest understory community in Illinois, USA. We found degradation of interaction network structure and function and extirpation of 50% of bee species. Network changes can be attributed to shifts in forb and bee phenologies resulting in temporal mismatches, nonrandom species extinctions, and loss of spatial co-occurrences between extant species in modified landscapes. Quantity and quality of pollination services have declined through time. The historic network showed flexibility in response to disturbance; however, our data suggest that networks will be less resilient to future changes. [Mh] Termos MeSH primário: Abelhas/fisiologia Extinção Biológica Poaceae/crescimento & desenvolvimento Polinização Árvores/crescimento & desenvolvimento [Mh] Termos MeSH secundário: Animais Flores/crescimento & desenvolvimento Illinois Portulacaceae/crescimento & desenvolvimento [Pt] Tipo de publicação: JOURNAL ARTICLE; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S. [Em] Mês de entrada: 1304 [Cu] Atualização por classe: 130329 [Lr] Data última revisão: 130329 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 130302 [St] Status: MEDLINE [do] DOI: 10.1126/science.1232728

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[PMID]: 23404991 [Au] Autor: Cave RL; Hammer GL; McLean G; Birch CJ; Erwin JE; Johnston ME [Ad] Endereço: The University of Queensland, School of Agriculture and Food Sciences, Gatton, Qld 4343, Australia. robyn.cave@uqconnect.edu.au [Ti] Título: Modelling temperature, photoperiod and vernalization responses of Brunonia australis (Goodeniaceae) and Calandrinia sp. (Portulacaceae) to predict flowering time. [So] Source: Ann Bot;111(4):629-39, 2013 Apr. [Is] ISSN: 1095-8290 [Cp] País de publicação: England [La] Idioma: eng [Ab] Resumo: BACKGROUND AND AIMS: Crop models for herbaceous ornamental species typically include functions for temperature and photoperiod responses, but very few incorporate vernalization, which is a requirement of many traditional crops. This study investigated the development of floriculture crop models, which describe temperature responses, plus photoperiod or vernalization requirements, using Australian native ephemerals Brunonia australis and Calandrinia sp. METHODS: A novel approach involved the use of a field crop modelling tool, DEVEL2. This optimization program estimates the parameters of selected functions within the development rate models using an iterative process that minimizes sum of squares residual between estimated and observed days for the phenological event. Parameter profiling and jack-knifing are included in DEVEL2 to remove bias from parameter estimates and introduce rigour into the parameter selection process. KEY RESULTS: Development rate of B. australis from planting to first visible floral bud (VFB) was predicted using a multiplicative approach with a curvilinear function to describe temperature responses and a broken linear function to explain photoperiod responses. A similar model was used to describe the development rate of Calandrinia sp., except the photoperiod function was replaced with an exponential vernalization function, which explained a facultative cold requirement and included a coefficient for determining the vernalization ceiling temperature. Temperature was the main environmental factor influencing development rate for VFB to anthesis of both species and was predicted using a linear model. CONCLUSIONS: The phenology models for B. australis and Calandrinia sp. described development rate from planting to VFB and from VFB to anthesis in response to temperature and photoperiod or vernalization and may assist modelling efforts of other herbaceous ornamental plants. In addition to crop management, the vernalization function could be used to identify plant communities most at risk from predicted increases in temperature due to global warming. [Mh] Termos MeSH primário: Flores/crescimento & desenvolvimento Magnoliopsida/fisiologia Modelos Biológicos Fotoperíodo [Mh] Termos MeSH secundário: Modelos Lineares Portulacaceae/fisiologia Temperatura Ambiente Fatores de Tempo [Pt] Tipo de publicação: JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T [Em] Mês de entrada: 1308 [Cu] Atualização por classe: 171116 [Lr] Data última revisão: 171116 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 130214 [St] Status: MEDLINE [do] DOI: 10.1093/aob/mct028

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[PMID]: 23360007 [Au] Autor: Savithramma N; Ankanna S; Rao ML; Saradvathi J [Ad] Endereço: Department of Botany, Sri Venkateswara University, Tirupati--517 502, India. prof.savithri@yahoo.in [Ti] Título: Studies on antimicrobial efficacy of medicinal tuberous shrub Talinum cuneifolium. [So] Source: J Environ Biol;33(4):775-80, 2012 Jul. [Is] ISSN: 0254-8704 [Cp] País de publicação: India [La] Idioma: eng [Ab] Resumo: Talinum cuneifolium (Vahl.) Willd. an erect shrub with subterranian tuber (Portulacaceae) is endowed with wide range of pharmacological activities. The antimicrobial efficacy of the plant is evaluated against three bacteria and two fungal species by disc diffusion method. Preliminary phytochemical screening was carried out among hexane, ethylacetate, methanolic extracts of leaf and roottuber for different potent chemicals. The leaf methanolic extract of T cuneifolium showed maximum effect on the growth of Proteus (25.8 mm) followed by Bacillus (24.62 mm) and E. coli (19.42 mm). The tuberous methanolic extract of T cuneifolium showed maximum effect on growth of Proteus (28.15 mm) followed by Bacillus (26.88 mm) and E. coli (24.51 mm). The Gram-positive bacterial strains (Bacillus) were more susceptible to the extractions of T cuneifolium as compared to Gram-negative bacteria (E. coli, Pseudomonas aeruginosa, Proteus vulgaris and Klebsiella pneumoneia). The antifungal activity of selected plant leaf and root tubers exhibit pronounced activity against Candida albicans rather than Aspergillus niger. These studies showed that the methanolic extracts of T cuneifolium plant parts were certainly much better and powerful. This may be due to the better solubility of the action components in organic solvent. [Mh] Termos MeSH primário: Antibacterianos/farmacologia Bactérias/efeitos dos fármacos Candida albicans/efeitos dos fármacos Extratos Vegetais/farmacologia Plantas Medicinais/química Portulacaceae/química [Mh] Termos MeSH secundário: Antibacterianos/química Extratos Vegetais/química [Pt] Tipo de publicação: JOURNAL ARTICLE [Nm] Nome de substância: 0 (Anti-Bacterial Agents); 0 (Plant Extracts) [Em] Mês de entrada: 1303 [Cu] Atualização por classe: 170203 [Lr] Data última revisão: 170203 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 130131 [St] Status: MEDLINE

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