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Registros recuperados: 55 | |
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FONTOURA,Fernanda Mussi; MATIAS,Rosemary; LUDWIG,Juliane; OLIVEIRA,Ademir Kleber Morbeck de; BONO,José Antonio Maior; MARTINS,Pedro de Figueiredo Rocha Barbosa; CORSINO,Joaquim; GUEDES,Neiva Maria Robaldo. |
In the Southern Pantanal, the hyacinth macaw (Anodorhynchus hyacinthinus), an endangered species, often chooses the manduvi tree (Sterculia apetala) as a nesting site, because of its physical properties. In addition, the chemical composition of the wood may also contribute to a nesting selection by the hyacinth macaws. The objective of this study was to determine the main chemical components of S. apetala bark for two seasons, and evaluate its fungicidal potential. Bark samples from S. apetala trees with and without nests of A. hyacinthinus were collected in January (wet season) and August (dry season) of 2012. The inhibition of mycelium growth (MGI) from tree samples with and without nests were assessed using a phytochemical analysis to evaluate their... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manduvi; Anodorhynchus hyacinthinus; Trichoderma sp.; Secondary metabolites; Flavonoids. |
Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672015000300283 |
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CARVALHO,Josiwander Miranda; PAIXÃO,Luanna Karyna Olimpio da; DOLABELA,Maria Fani; MARINHO,Patrícia Santana Barbosa; MARINHO,Andrey Moacir do Rosario. |
ABSTRACTEndophytic fungi are fungi that colonize internal tissues of plants. There are few studies of compounds isolated from endophytic fungi of Amazon plants. Thus, the aim this study was the isolation and structural identification of sitosterol (1), stigmasterol (2), sitostenone (3), squalene (4), ergosterol (5) and ergosterol peroxide (6) from fungus Colletotrichum gloeosporioidesisolated as endophytic from Virola michelli, a typical Amazon plant, used in folk medicine against skin infection. Compounds were isolated by chromatography column on silica and identified by 1H and 13C NMR and MS. The presence of phytosterols in fungi is rare and this is the first report of the isolation of the phytosterols sitosterol, stigmasterol and sitostenone from the... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sterols; Secondary metabolites; Amazon fungi. |
Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672016000100069 |
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Souza,Antonio P.; Marques,Maria R.; Mahmoud,Talal S.; Caputo,Bruno A.; Canhete,Gabriel M.; Leite,Carla B.; Lima,Dênis P. de. |
This paper reports on an evaluation of the insecticidal activity of extracts prepared from leaves of Tapirira guianensis Aubl. (Anacardiaceae), Attalea phalerata (Mart. ex Spreng.) Burret (Arecaceae), Eugenia uniflora L. (Myrtaceae), and Gomphrena elegans Mart. (Amaranthaceae) and from stems of Myracrodruon urundeuva Allemão (Anacardiaceae). Four extracts and 18 fractions with a range of polarities were tested. Ten-gram batches of wheat grains were each nebulized with 1 mL of a separate extract at 10% w/v. After solvent evaporation at 38 ºC, the grains were placed into flasks along with 20 unsexed 10- to 20-day old adult individuals of Sitophilus zeamais. The assessment was carried out on the fifth and tenth day by counting and discarding the dead insects.... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Secondary metabolites; Insecticidal plant; Maize weevil; Sitophilus zeamais. |
Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062008000400024 |
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Silva,Maiara Matilde da; Boeger,Maria Regina Torres; Melo Júnior,João Carlos Ferreira de; Santos,Bruno Francisco Sant’Anna dos. |
ABSTRACT Plant-herbivore interactions have directed the evolution of defense mechanisms in plants, which can vary intraspecifically according to environmental quality. This study evaluated variation in the production of antiherbivory defenses in plant species distributed along an environmental gradient of restinga. The study was performed in Parque Estadual Acaraí, state of Santa Catarina, Brazil. Three species of four plant formations with different abiotic conditions were selected for study. Specific leaf area; water, nitrogen and carbon content; and presence of phenols, tannins, lignin and alkaloids, were evaluated in leaves of ten plants per species per plant formation. The results indicated that Symphyopappus casarettoi possesses Low Nutritional... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coastal plain; Herbivore-plant interaction; Histochemistry; Parque Estadual Acaraí; Physical defense; Secondary metabolites. |
Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000400583 |
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Milech, Cristini; Lucho, Simone Ribeiro; Kleinowski, Alítcia Moraes; Dutra, Débora Barwaldt; Soares, Mariana Mühlenberg; Braga, Eugenia Jacira Bolacel. |
Among the compounds produced by plants, pigments such as betalains have received attention from both food and pharmaceuticals industries. The Alternanthera sessilis species produces these pigments, though in small quantities, and so it is necessary to increase production. Thus, many studies use elicitors that are capable of triggering physiological or morphological responses in plants. The objective was to establish callus production in A. sessilis grown under different combinations of growth regulators and light qualities and to assess whether these factors can increase betalain and flavonoid production. Leaf and internodal explants in MS medium with different growth regulators were used to obtain calli, which were subsequently transferred to a betacyanin... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Betalain; Flavonoids; Secondary metabolites; Medicinal plants.. |
Ano: 2017 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/36312 |
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SOUSA,WENDEL C. DE; T.S. PAZ,ANDRESSA; ROCHA,JAMIRA D.; CONCEIÇÃO,EDEMILSON C. DA; ALMEIDA,LUCIANE M. DE; CHEN,LEE C.; BORGES,LEONARDO L.; BAILÃO,ELISA F.L.C.. |
ABSTRACT Costus spiralis is a Brazilian native plant used in popular medicine, but the safety of this therapeutic use needs investigation. So, the aim of this study was to evaluate the cytogenotoxic and antigenotoxic effects of C. spiralis leaves or stems aqueous extracts on Allium cepa root cells. Moreover, a phytochemical screening and an antioxidant and antifungal activities evaluation were performed. C. spiralis aqueous extracts presented cytotoxicity, but no mutagenicity was observed. When the antigenotoxicity was evaluated, C. spiralis leaves aqueous extract presented preventive and modulatory effects on A. cepa root cells, reducing the sodium azide cytogenotoxic effects. In contrast, C. spiralis stems aqueous extract enhanced the sodium azide... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allium cepa test; Antioxidant; Medicinal plant; Secondary metabolites. |
Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401565 |
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Paiva,Selma R.; Lima,Lucilene A.; Figueiredo,Maria Raquel; Kaplan,Maria Auxiliadora C.. |
Plumbago scandens L. is a Brazilian tropical/subtropical species that occurs along the coast. Chemically it is mainly represented by naphthoquinones, flavonoids, terpenoids and steroids. The aim of the present work is to study quantitative changes in the root metabolic production of Plumbago scandens during different physiologic developmental stages relative to floration. The results indicated the presence of four substances in the extracts: plumbagin, epi-isoshinanolone, palmitic acid and sitosterol, independent on developmental stage. The naphthoquinone plumbagin has always showed to be the major component of all extracts. Naphthoquinones exhibited their highest content during floration, while the content of the two others components decreased during... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: GC/MS; Plant physiology; Plubaginaceae; Secondary metabolites. |
Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000400004 |
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MERCADANTE-SIMÕES,MARIA OLÍVIA; MAZZOTTINI-DOS-SANTOS,HELLEN C.; NERY,LAYS A.; FERREIRA,PERACIO R.B.; RIBEIRO,LEONARDO M.; ROYO,VANESSA A.; OLIVEIRA,DARIO A. DE. |
The bark of the underground stem of Tontelea micrantha (Mart. ex. Schult.) A. C. Sm., a native Brazilian Cerrado species, is used in folk medicine for treating kidney ailments. The structures of the underground and the aerial stems were examined and their barks were analyzed for the presence of secondary metabolites. Bark fragments were processed according to conventional techniques in plant anatomy and their chemical compositions examined using histochemical and phytochemical tests, thin layer chromatography, and high-efficiency liquid chromatography. The underground stem is a sobol with unusual cambial activity. Laticifers that secrete terpenoids were present in the cortex and phloem of both organs and can contribute to the identification of the species... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Natural products; Pharmacognosy; Secondary metabolites; Sobol. |
Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000301167 |
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Menezes,C.B.A.; Silva,B.P.; Sousa,I.M.O.; Ruiz,A.L.T.G.; Spindola,H.M.; Cabral,E.; Eberlin,M.N.; Tinti,S.V.; Carvalho,J.E.; Foglio,M.A.; Fantinatti-Garboggini,F.. |
Natural products produced by microorganisms have been an important source of new substances and lead compounds for the pharmaceutical industry. Chromobacterium violaceum is a Gram-negative β-proteobacterium, abundant in water and soil in tropical and subtropical regions and it produces violacein, a pigment that has shown great pharmaceutical potential. Crude extracts of five Brazilian isolates of Chromobacterium sp (0.25, 2.5, 25, and 250 µg/mL) were evaluated in an in vitro antitumor activity assay with nine human tumor cells. Secondary metabolic profiles were analyzed by liquid chromatography and electrospray ionization mass spectrometry resulting in the identification of violacein in all extracts, whereas FK228 was detected only in EtCE 308 and EtCE 592... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chromobacterium sp; Antitumor activity; Secondary metabolites; Genetic diversity; Violacein. |
Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2013000100065 |
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Banhos,Elissandro Fonseca dos; Souza,Antonia Queiroz Lima de; Andrade,Juliano Camurça de; Souza,Afonso Duarte Leão de; Koolen,Hector Henrique Ferreira; Albuquerque,Patrícia Melchionna. |
Beneficial interactions between plants and microorganisms have been investigated under different ecological, physiological, biochemical, and genetic aspects. However, the systematic exploration of biomolecules with potential for biotechnological products from this interaction still is relatively scarce. Therefore, this study aimed the evaluation of the diversity and antimicrobial activity of the endophytic fungi obtained from roots, stems and leafs of Myrcia guianensis (Myrtaceae) from the Brazilian Amazon. 156 endophytic fungi were isolated and above 80% were identified by morphological examination as belonging to the genera Pestalotiopsis, Phomopsis, Aspergillus, Xylaria, Nectria, Penicillium and Fusarium. Fermented broth of those fungi were assayed for... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Secondary metabolites; Fungus/plant interaction; Antibiosis; Amazonian endophytic fungi. |
Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000100021 |
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Soares,Ana Cristina Fermino; Sousa,Carla da Silva; Garrido,Marlon da Silva; Perez,Jane Oliveira; Almeida,Nailson Santos de. |
Yam (Dioscorea cayennensis Lam), an important crop in the Northeastern region of Brazil, is susceptible to the attack of several phytopathogenic fungi, such as Curvularia eragrostides (Henn.) Meyer and Colletotrichum gloeosporioides (Penz.), which cause leaf spot diseases. This work aimed to evaluate the effect of six actinomycete isolates (S. thermotolerans, S. griseus subsp. griseus, Streptomyces sp. N0035, S. purpurascens, and two isolates identified as Streptomyces sp.), as well as the effect of their secondary metabolites, on mycelium growth and spore germination of C. eragrostides and C. gloeosporioides, from yam plants, cultivar da Costa. Additionally, the chitinolytic activity of these actinomycete strains was determined in a minimum salt growth... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biocontrol; Dioscorea cayennensis; Actinomycetes; Secondary metabolites. |
Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822006000400010 |
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Rosa,Luiz H.; Gonçalves,Vívian N.; Caligiorne,Rachel B.; Alves,Tânia M. A.; Rabello,Ana; Sales,Policarbo A.; Romanha,Alvaro J.; Sobral,Marcos E. G.; Rosa,Carlos A.; Zani,Carlos L.. |
One hundred and twenty-one isolates of endophytic fungi were recovered from leaves of the bioactive Brazilian plant species Ageratum myriadenia, Palicourea tetraphylla, Piptadenia adiantoides, and Trixis vauthieri. All fungal isolates were cultivated in liquid media and crude extracts were obtained with ethyl acetate. The crude extracts were tested in bioassay panels using Leishmania amazonensis, Trypanosoma cruzi, the enzyme trypanothione reductase (TryR) from Trypanosoma cruzi, and three human cancer cell lines. Thirty-three extracts (27.2%) exhibited at least one biological activity. Seventeen extracts (14%) were cytotoxic against one or more human cancer cell line with the IC50 values ranged of >0.2 to 25 µg/mL. Twenty-four extracts (19.8%)... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Endophytic fungi; Human tumoral cell; Leishmania; Secondary metabolites; Trypanosoma cruzi. |
Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000200024 |
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Silva,Joanda Paolla Raimundo e; Reis,Malu Maria Lucas dos; Santana,Cleildo Pereira; Medeiros,Ana Cláudia Dantas de; Alves,Harley da Silva. |
Tacinga inamoena (K. Schum.) N.P. Taylor & Stuppy, also known as quipá, is a native cactus of the Caatinga used in traditional medicine to treat urethral infections and inflammation. This study aimed to determine the physicochemical characteristics of vegetal drug obtained from the roots of T. inamoena. Analytical techniques and phytochemical tests were used, such as thermal analysis, qualitative and semiquantitative determination of secondary metabolites and spectroscopy at the infrared region. The powder of the vegetal drug met the parameters established by the Brazilian Pharmacopoeia, except for compressibility, which was low. On the thermogravimetric curve, three events related to the mass loss were verified, which correlate with the vegetal drug... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cactaceae; Quality control; Herbal medicine; Secondary metabolites; Thermogravimetry. |
Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100602 |
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Silva,Maicon F. da; Pescador,Rosete; Rebelo,Ricardo A.; Stürmer,Sidney L.. |
We have investigated the effects of phosphate fertilization and inoculation with isolates of arbuscular mycorrhizal fungi Scutellospora heterogama SCT120E, Gigaspora decipiens SCT304A, Acaulospora koskei SCT400A, Entrophospora colombiana SCT115, and an assemblage (Mix) of all four isolates on growth, development and oleoresin production of micropropagated Zingiber officinale. After 120 and 210 d of growth, the Mix and phosphorus addition significantly increased shoot height relative to control plants. Phosphorus addition was the only treatment resulting in significantly large shoot dry biomass relative to control after 120 d. No statistical differences were observed between treatments for shoot dry biomass after 210 d and for fine and coarse root biomass... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fungal assemblage; Ginger; Oleoresin; Secondary metabolites. |
Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202008000200004 |
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Registros recuperados: 55 | |
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