Base de dados : MEDLINE
Pesquisa : B01.650.940.800.575.912.250.618.937.522 [Categoria DeCS]
Referências encontradas : 50 [refinar]
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[PMID]:29189770
[Au] Autor:Pechkova E; Nicolini C
[Ad] Endereço:Laboratories of Biophysics and Nanotechnology, University of Genoa Medical School, Genoa, Italy.
[Ti] Título:Langmuir-Blodgett nanotemplates for protein crystallography.
[So] Source:Nat Protoc;12(12):2570-2589, 2017 Dec.
[Is] ISSN:1750-2799
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The new generation of synchrotrons and microfocused beamlines has enabled great progress in X-ray protein crystallography, resulting in new 3D atomic structures for proteins of high interest to the pharmaceutical industry and life sciences. It is, however, often still challenging to produce protein crystals of sufficient size and quality (order, intensity of diffraction, radiation stability). In this protocol, we provide instructions for performing the Langmuir-Blodgett (LB) nanotemplate method, a crystallization approach that can be used for any protein (including membrane proteins). We describe how to produce highly ordered 2D LB protein monolayers at the air-water interface and deposit them on glass slides. LB-film formation can be observed by surface-pressure measurements and Brewster angle microscopy (BAM), although its quality can be characterized by atomic force microscopy (AFM) and nanogravimetry. Such films are then used as a 2D template for triggering 3D protein crystal formation by hanging-drop vapor diffusion. The procedure for forming the 2D template takes a few minutes. Structural information about the protein reorganization in the LB film during the crystallization process on the nano level can be obtained using an in situ submicron GISAXS (grazing-incidence small-angle X-ray scattering) method. MicroGISAXS spectra, measured directly at the interface of the LB films and protein solution in real time, as described in this protocol, can be interpreted in terms of the buildup of layers, islands, or holes. In our experience, the obtained LB crystals take 1-10 d to prepare and they are more ordered and radiation stable as compared with those produced using other crystallization methods.
[Mh] Termos MeSH primário: Cristalização/métodos
Cristalografia por Raios X/métodos
Nanoestruturas/química
Proteínas/química
[Mh] Termos MeSH secundário: Animais
Bovinos
Galinhas
Enzima de Clivagem da Cadeia Lateral do Colesterol/química
Cristalização/instrumentação
Cristalografia por Raios X/instrumentação
Desenho de Equipamento
Marantaceae/química
Modelos Moleculares
Muramidase/química
Proteínas de Plantas/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Plant Proteins); 0 (Proteins); 53850-34-3 (thaumatin protein, plant); EC 1.14.15.6 (Cholesterol Side-Chain Cleavage Enzyme); EC 3.2.1.17 (Muramidase)
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171219
[Lr] Data última revisão:
171219
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171201
[St] Status:MEDLINE
[do] DOI:10.1038/nprot.2017.108


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[PMID]:28764073
[Au] Autor:Healey RD; Lebhar H; Hornung S; Thordarson P; Marquis CP
[Ad] Endereço:School of Chemistry, The Australian Centre for Nanomedicine and the ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of New South Wales, Sydney, NSW, Australia. Electronic address: robert.healey@unsw.edu.au.
[Ti] Título:An improved process for the production of highly purified recombinant thaumatin tagged-variants.
[So] Source:Food Chem;237:825-832, 2017 Dec 15.
[Is] ISSN:0308-8146
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The sweetest tasting molecule known is the protein thaumatin, first isolated from the katemfe fruit, Thaumatococcus daniellii. Thaumatin is used in the food and beverage industry as a low-calorie sugar substitute. Thaumatin interacts with taste receptors in the oral cavity eliciting a persistent sweet taste and a bitter, liquorice flavor. Recombinant thaumatin was expressed in Pichia pastoris and through a co-expression strategy with a molecular chaperone, yields of one engineered thaumatin variant increased by greater than two-fold. A detailed purification strategy for thaumatin is reported resulting in a homogenous sample recovered at a yield of 42%. The recombinant thaumatins were extensively characterised using size exclusion chromatography for homogeneity, reversed-phase HPLC for purity (99%), peptide digest LC-MS/MS for sequence determination, and circular dichroism and tryptophan fluorescence spectroscopies for conformational characterisation. These new thaumatin variants are amenable for bioconjugation, providing chemical biology tools for thaumatin:taste receptor interaction studies.
[Mh] Termos MeSH primário: Proteínas de Plantas/química
[Mh] Termos MeSH secundário: Marantaceae
Pichia
Edulcorantes
Espectrometria de Massas em Tandem
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Plant Proteins); 0 (Sweetening Agents); 53850-34-3 (thaumatin protein, plant)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171031
[Lr] Data última revisão:
171031
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170803
[St] Status:MEDLINE


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[PMID]:28319334
[Au] Autor:Fontana G; Gershlak J; Adamski M; Lee JS; Matsumoto S; Le HD; Binder B; Wirth J; Gaudette G; Murphy WL
[Ad] Endereço:Department of Orthopedics and Rehabilitation, University of Wisconsin School of Medicine and Public Health, Madison, WI, 53705, USA.
[Ti] Título:Biofunctionalized Plants as Diverse Biomaterials for Human Cell Culture.
[So] Source:Adv Healthc Mater;6(8), 2017 Apr.
[Is] ISSN:2192-2659
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:The commercial success of tissue engineering products requires efficacy, cost effectiveness, and the possibility of scaleup. Advances in tissue engineering require increased sophistication in the design of biomaterials, often challenging the current manufacturing techniques. Interestingly, several of the properties that are desirable for biomaterial design are embodied in the structure and function of plants. This study demonstrates that decellularized plant tissues can be used as adaptable scaffolds for culture of human cells. With simple biofunctionalization technique, it is possible to enable adhesion of human cells on a diverse set of plant tissues. The elevated hydrophilicity and excellent water transport abilities of plant tissues allow cell expansion over prolonged periods of culture. Moreover, cells are able to conform to the microstructure of the plant frameworks, resulting in cell alignment and pattern registration. In conclusion, the current study shows that it is feasible to use plant tissues as an alternative feedstock of scaffolds for mammalian cells.
[Mh] Termos MeSH primário: Técnicas de Cultura de Células/métodos
Marantaceae/química
Células Mesenquimais Estromais/metabolismo
Petroselinum/química
Tecidos Suporte/química
[Mh] Termos MeSH secundário: Linhagem Celular
Seres Humanos
Células Mesenquimais Estromais/citologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170630
[Lr] Data última revisão:
170630
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170321
[St] Status:MEDLINE
[do] DOI:10.1002/adhm.201601225


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[PMID]:27469093
[Au] Autor:Cui X; Dai X; Khan KY; Li T; Yang X; He Z
[Ad] Endereço:Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.
[Ti] Título:Removal of phosphate from aqueous solution using magnesium-alginate/chitosan modified biochar microspheres derived from Thalia dealbata.
[So] Source:Bioresour Technol;218:1123-32, 2016 Oct.
[Is] ISSN:1873-2976
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The objective of this study was to determine the feasibility of using magnesium-alginate/chitosan modified biochar microspheres to enhance removal of phosphate from aqueous solution. The introduction of MgCl2 substantially increased surface area of biochar (116.2m(2)g(-1)), and both granulation with alginate/chitosan and modification with magnesium improved phosphate sorption on the biochars. Phosphate sorption on the biochars could be well described by a simple Langmuir model, and the MgCl2-alginate modified biochar microspheres exhibited the highest phosphate sorption capacity (up to 46.56mgg(-1)). The pseudo second order kinetic model better fitted the kinetic data, and both the Yoon-Nelson and Thomas models were superior to other models in describing phosphate dynamic sorption. Precipitation with minerals and ligand exchange were the possible mechanisms of phosphate sorption on the modified biochars. These results imply that MgCl2-alginate modified biochar microspheres have potential as a green cost-effective sorbent for remediating P contaminated water environment.
[Mh] Termos MeSH primário: Alginatos/química
Carvão Vegetal/química
Quitosana/química
Magnésio/química
Marantaceae/química
Microesferas
Fosfatos/isolamento & purificação
Poluentes Químicos da Água/isolamento & purificação
[Mh] Termos MeSH secundário: Adsorção
Cristalização
Ácido Glucurônico/química
Ácidos Hexurônicos/química
Concentração de Íons de Hidrogênio
Cinética
Ligantes
Soluções
Temperatura Ambiente
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Alginates); 0 (Hexuronic Acids); 0 (Ligands); 0 (Phosphates); 0 (Solutions); 0 (Water Pollutants, Chemical); 0 (biochar); 16291-96-6 (Charcoal); 8A5D83Q4RW (Glucuronic Acid); 8C3Z4148WZ (alginic acid); 9012-76-4 (Chitosan); I38ZP9992A (Magnesium)
[Em] Mês de entrada:1701
[Cu] Atualização por classe:170110
[Lr] Data última revisão:
170110
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160730
[St] Status:MEDLINE


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[PMID]:27354737
[Au] Autor:Koch K; Grichnik R
[Ad] Endereço:Faculty of Life Sciences, Rhine-Waal University of Applied Sciences, Marie Curie-Straße 1, 47533 Kleve, Germany koch@hochschule-rhein-waal.de.
[Ti] Título:Influence of surface structure and chemistry on water droplet splashing.
[So] Source:Philos Trans A Math Phys Eng Sci;374(2073), 2016 Aug 06.
[Is] ISSN:1364-503X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Water droplet splashing and aerosolization play a role in human hygiene and health systems as well as in crop culturing. Prevention or reduction of splashing can prevent transmission of diseases between animals and plants and keep technical systems such as pipe or bottling systems free of contamination. This study demonstrates to what extent the surface chemistry and structures influence the water droplet splashing behaviour. Smooth surfaces and structured replicas of Calathea zebrina (Sims) Lindl. leaves were produced. Modification of their wettability was done by coating with hydrophobizing and hydrophilizing agents. Their wetting was characterized by contact angle measurement and splashing behaviour was observed with a high-speed video camera. Hydrophobic and superhydrophilic surfaces generally showed fewer tendencies to splash than hydrophobic ones. Structuring amplified the underlying behaviour of the surface chemistries, increasing hydrophobic surfaces' tendency to splash and decreasing splash on hydrophilic surfaces by quickly transporting water off the impact point by capillary forces. The non-porous surface structures found in C. zebrina could easily be applied to technical products such as plastic foils or mats and coated with hydrophilizing agents to suppress splash in areas of increased hygiene requirements or wherever pooling of liquids is not desirable.This article is part of the themed issue 'Bioinspired hierarchically structured surfaces for green science'.
[Mh] Termos MeSH primário: Marantaceae/química
Marantaceae/ultraestrutura
Folhas de Planta/química
Folhas de Planta/ultraestrutura
Água/química
Molhabilidade
[Mh] Termos MeSH secundário: Materiais Biomiméticos/química
Interações Hidrofóbicas e Hidrofílicas
Teste de Materiais
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
059QF0KO0R (Water)
[Em] Mês de entrada:1609
[Cu] Atualização por classe:160629
[Lr] Data última revisão:
160629
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160630
[St] Status:MEDLINE


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[PMID]:26163566
[Au] Autor:Pepe LS; Moraes J; Albano KM; Telis VR; Franco CM
[Ad] Endereço:UNESP - São Paulo State University - Department of Food Engineering and Technology, São Paulo, Brazil.
[Ti] Título:Effect of heat-moisture treatment on the structural, physicochemical, and rheological characteristics of arrowroot starch.
[So] Source:Food Sci Technol Int;22(3):256-65, 2016 Apr.
[Is] ISSN:1532-1738
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The effect of heat-moisture treatment on structural, physicochemical, and rheological characteristics of arrowroot starch was investigated. Heat-moisture treatment was performed with starch samples conditioned to 28% moisture at 100 ℃ for 2, 4, 8, and 16 h. Structural and physicochemical characterization of native and modified starches, as well as rheological assays with gels of native and 4 h modified starches subjected to acid and sterilization stresses were performed. Arrowroot starch had 23.1% of amylose and a CA-type crystalline pattern that changed over the treatment time to A-type. Modified starches had higher pasting temperature and lower peak viscosity while breakdown viscosity practically disappeared, independently of the treatment time. Gelatinization temperature and crystallinity increased, while enthalpy, swelling power, and solubility decreased with the treatment. Gels from modified starches, independently of the stress conditions, were found to have more stable apparent viscosities and higher G' and G″ than gels from native starch. Heat-moisture treatment caused a reorganization of starch chains that increased molecular interactions. This increase resulted in higher paste stability and strengthened gels that showed higher resistance to shearing and heat, even after acid or sterilization conditions. A treatment time of 4 h was enough to deeply changing the physicochemical properties of starch.
[Mh] Termos MeSH primário: Temperatura Alta
Marantaceae/química
Reologia
Amido/química
[Mh] Termos MeSH secundário: Configuração de Carboidratos
Análise de Alimentos
Água
Difração de Raios X
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
059QF0KO0R (Water); 9005-25-8 (Starch)
[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:150712
[St] Status:MEDLINE
[do] DOI:10.1177/1082013215595147


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[PMID]:26457431
[Au] Autor:Warren AJ; Crawshaw AD; Trincao J; Aller P; Alcock S; Nistea I; Salgado PS; Evans G
[Ad] Endereço:Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, England.
[Ti] Título:In vacuo X-ray data collection from graphene-wrapped protein crystals.
[So] Source:Acta Crystallogr D Biol Crystallogr;71(Pt 10):2079-88, 2015 Oct.
[Is] ISSN:1399-0047
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The measurement of diffraction data from macromolecular crystal samples held in vacuo holds the promise of a very low X-ray background and zero absorption of incident and scattered beams, leading to better data and the potential for accessing very long X-ray wavelengths (>3 Å) for native sulfur phasing. Maintaining the hydration of protein crystals under vacuum is achieved by the use of liquid jets, as with serial data collection at free-electron lasers, or is side-stepped by cryocooling the samples, as implemented at new synchrotron beamlines. Graphene has been shown to protect crystals from dehydration by creating an extremely thin layer that is impermeable to any exchanges with the environment. Furthermore, owing to its hydrophobicity, most of the aqueous solution surrounding the crystal is excluded during sample preparation, thus eliminating most of the background caused by liquid. Here, it is shown that high-quality data can be recorded at room temperature from graphene-wrapped protein crystals in a rough vacuum. Furthermore, it was observed that graphene protects crystals exposed to different relative humidities and a chemically harsh environment.
[Mh] Termos MeSH primário: Cristalografia por Raios X/métodos
Grafite/química
Proteínas/química
[Mh] Termos MeSH secundário: Aldose-Cetose Isomerases/química
Animais
Galinhas
Cristalização/métodos
Marantaceae/química
Muramidase/química
Proteínas de Plantas/química
Streptomyces/enzimologia
Temperatura Ambiente
Vácuo
Água/química
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Plant Proteins); 0 (Proteins); 059QF0KO0R (Water); 53850-34-3 (thaumatin protein, plant); 7782-42-5 (Graphite); EC 3.2.1.- (hen egg lysozyme); EC 3.2.1.17 (Muramidase); EC 5.3.1.- (Aldose-Ketose Isomerases); EC 5.3.1.5 (xylose isomerase)
[Em] Mês de entrada:1608
[Cu] Atualização por classe:170412
[Lr] Data última revisão:
170412
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:151013
[St] Status:MEDLINE
[do] DOI:10.1107/S1399004715014194


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[PMID]:26290552
[Au] Autor:Westerband AC; Horvitz CC
[Ad] Endereço:University of Miami, Department of Biology, Cox Science Center, 1301 Memorial Drive, Coral Gables, FL 33124-0421 USA.
[Ti] Título:Interactions between plant size and canopy openness influence vital rates and life-history tradeoffs in two neotropical understory herbs.
[So] Source:Am J Bot;102(8):1290-9, 2015 Aug.
[Is] ISSN:1537-2197
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:UNLABELLED: • PREMISE OF THE STUDY: For tropical forest understory plants, the ability to grow, survive, and reproduce is limited by the availability of light. The extent to which reproduction incurs a survival or growth cost may change with light availability, plant size, and adaptation to shade, and may vary among similar species.• METHODS: We estimated size-specific rates of growth, survival, and reproduction (vital rates), for two neotropical understory herbs (order Zingiberales) in a premontane tropical rainforest in Costa Rica. During three annual censuses we monitored 1278 plants, measuring leaf area, number of inflorescences, and canopy openness. We fit regression models of all vital rates and evaluated them over a range of light levels. The best fitting models were selected using Akaike's Information Criterion.• KEY RESULTS: All vital rates were significantly influenced by size in both species, but not always by light. Increasing light resulted in higher growth and a higher probability of reproduction in both species, but lower survival in one species. Both species grew at small sizes but shrank at larger sizes. The size at which shrinkage began differed among species and light environments. Vital rates of large individuals were more sensitive to changes in light than small individuals.• CONCLUSIONS: Increasing light does not always positively influence vital rates; the extent to which light affects vital rates depends on plant size. Differences among species in their abilities to thrive under different light conditions and thus occupy distinct niches may contribute to the maintenance of species diversity.
[Mh] Termos MeSH primário: Ecossistema
Heliconiaceae/fisiologia
Marantaceae/fisiologia
[Mh] Termos MeSH secundário: Costa Rica
Heliconiaceae/crescimento & desenvolvimento
Inflorescência/crescimento & desenvolvimento
Inflorescência/fisiologia
Marantaceae/crescimento & desenvolvimento
Folhas de Planta/crescimento & desenvolvimento
Folhas de Planta/fisiologia
Floresta Úmida
Análise de Regressão
Reprodução
Clima Tropical
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1605
[Cu] Atualização por classe:150820
[Lr] Data última revisão:
150820
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150821
[St] Status:MEDLINE
[do] DOI:10.3732/ajb.1500041


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[PMID]:26077223
[Au] Autor:Chu J; Zhang J; Zhou X; Liu B; Li Y
[Ad] Endereço:Department of Environment Engineering, School of the Environment and Safety Engineering, Jiangsu University, 301, Xuefu Road, Zhenjiang, 212013, Jiangsu, People's Republic of China, chujinyu88@163.com.
[Ti] Título:A Comparison of Anammox Bacterial Abundance and Community Structures in Three Different Emerged Plants-Related Sediments.
[So] Source:Curr Microbiol;71(3):421-7, 2015 Sep.
[Is] ISSN:1432-0991
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Quantitative polymerase chain reaction (qPCR) assays and 16S rRNA gene clone libraries were used to document the abundance, diversity and community structure of anaerobic ammonia-oxidising (anammox) bacteria in the rhizosphere and non-rhizosphere sediments of three emergent macrophyte species (Iris pseudacorus, Thalia dealbata and Typha orientalis). The qPCR results confirmed the existence of anammox bacteria (AMX) with observed log number of gene copies per dry gram sediment ranging from 5.00 to 6.78. AMX was more abundant in T. orientalis-associated sediments than in the other two plant species. The I. pseudacorus- and T. orientalis-associated sediments had higher Shannon diversity values, indicating higher AMX diversity in these sediments. Based on the 16S rRNA gene, Candidatus 'Brocadia', Candidatus 'Kuenenia', Candidatus 'Jettenia' and new clusters were observed with the predominant Candidatus 'Kuenenia' cluster. The I. pseudacorus-associated sediments contained all the sequences of the C. 'Jettenia' cluster. Sequences obtained from T. orientalis-associated sediments contributed more than 90 % sequences in the new cluster, whereas none was found from I. pseudacorus. The new cluster was distantly related to known sequences; thus, this cluster was grouped outside the known clusters, indicating that the new cluster may be a new Planctomycetales genus. Further studies should be undertaken to confirm this finding.
[Mh] Termos MeSH primário: Amônia/metabolismo
Bactérias/crescimento & desenvolvimento
Bactérias/metabolismo
Biota
Microbiologia do Solo
[Mh] Termos MeSH secundário: Aerobiose
Anaerobiose
Análise por Conglomerados
DNA Bacteriano/química
DNA Bacteriano/genética
DNA Ribossômico/química
DNA Ribossômico/genética
Iris/microbiologia
Marantaceae/microbiologia
Dados de Sequência Molecular
Oxirredução
Filogenia
RNA Ribossômico 16S/genética
Reação em Cadeia da Polimerase em Tempo Real
Análise de Sequência de DNA
Typhaceae/microbiologia
[Pt] Tipo de publicação:LETTER; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (DNA, Bacterial); 0 (DNA, Ribosomal); 0 (RNA, Ribosomal, 16S); 7664-41-7 (Ammonia)
[Em] Mês de entrada:1604
[Cu] Atualização por classe:170926
[Lr] Data última revisão:
170926
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150617
[St] Status:MEDLINE
[do] DOI:10.1007/s00284-015-0851-5


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[PMID]:25997015
[Au] Autor:Jerominek M; Claßen-Bockhoff R
[Ad] Endereço:Institut für Spezielle Botanik und Botanischer Garten, Johannes Gutenberg-Universität, Mainz, Germany.
[Ti] Título:Electrical signals in prayer plants (marantaceae)? Insights into the trigger mechanism of the explosive style movement.
[So] Source:PLoS One;10(5):e0126411, 2015.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The explosive pollination mechanism of the prayer plants (Marantaceae) is unique among plants. After a tactile stimulus by a pollinator, the style curls up rapidly and mediates pollen exchange. It is still under discussion whether this explosive movement is released electrophysiologically, i.e. by a change in the membrane potential (as in Venus flytrap), or purely mechanically. In the present study, electrophysiological experiments are conducted to clarify the mechanism. Artificial release experiments (chemical and electrical) and electrophysiological measurements were conducted with two phylogenetically distant species, Goeppertia bachemiana (E. Morren) Borchs. & S. Suárez and Donax canniformis (G. Forst.) K. Schum. Electric responses recorded after style release by extracellular measurements are characterised as variation potentials due to their long repolarization phase and lack of self-perpetuation. In both species, chemical and electric stimulations do not release the style movement. It is concluded that the style movement in Marantaceae is released mechanically by relieving the tissue pressure. Accordingly, the variation potential is an effect of the movement and not its cause. The study exemplarily shows that fast movements in plants are not necessarily initiated by electric changes of the membrane as known from the Venus flytrap.
[Mh] Termos MeSH primário: Fenômenos Eletrofisiológicos
Marantaceae/fisiologia
Polinização
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1602
[Cu] Atualização por classe:170220
[Lr] Data última revisão:
170220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150522
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0126411



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