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Registros recuperados: 53
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Activities and Novel Applications of Secondary Metabolite Coumarins Planta Daninha
HUSSAIN,M.I.; QAMAR ABBAS,S.; REIGOSA,M.J..
ABSTRACT: This review covers biological activity of secondary metabolites, coumarin and their derivatives on different organisms (pests, pathogens, weeds), as well as their applications in agriculture as eco-friendly pesticides and weed control agents. Naturally occurring coumarins have shown biological and allelopathic potential on a broad range of organisms. Coumarin inhibits seed germination, root growth, morphology, histology, water uptake, respiration, photosynthesis, cell elongation, cell división and differentiation. Coumarin demonstrate excellent insecticidal potential against eggs, larvae and adult insects. Coumarin showed antifeedent responses in a wide range of memebers from invertebrates to vertebrates. The information provided in this review...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coumarin; Secondary metabolites; Multifunctionality; Herbivory; Allelopathy; Phytotoxicity; Weed control.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100220
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Allelopathic Potential of Ethanolic Extract and Phytochemical Analysis of Paspalum maritimum Trind Planta Daninha
PEREIRA,J.C.; PAULINO,C.L.A.; ENDRES,L.; SANTANA,A.E.G.; PEREIRA,F.R.S.; SOUZA,R.C..
ABSTRACT: Allelopathy is defined as the ability of certain plants and microorganisms to interfere with the metabolism of other species through substances released into the environment, being an alternative to control weeds and diseases. In this context, this study aimed to evaluate the allelopathic potential and identify groups of secondary metabolites of Paspalum maritimum Trind. The species Lactuca sativa, Digitaria insularis, Emilia coccinea, and Portulaca oleracea were used as recipient plants. The ethanolic extract was obtained from shoot and root of donor species to evaluate the allelopathic potential. Potentially allelopathic effects were evaluated by means of germination tests, germination speed index, and initial seedling growth. A phytochemical...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allelopathy; Ginger grass; Secondary metabolites.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100251
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Antifungal potential of crude extracts of Trichoderma spp. Biota Neotropica
Marques,Eder; Martins,Irene; Mello,Sueli Correa Marques de.
Abstract Antibiosis is the mechanism by which certain microorganisms respond to the presence of others, secreting compounds or metabolites capable of inhibiting or impeding their development. The crude extract of Trichoderma contains a mixture of secondary compounds, which may show antibiotic effect, and has been used for the prospect of this fungus for biological control and other industrial purposes. Faced with the increasing demand of agriculture for ecologically compatible alternatives for the management of diseases, this work aimed to investigate the spectrum of action of Non-Volatile Metabolites (NVMs) of Trichoderma isolates against different plant pathogenic fungi. The antagonistic potential of NVMs was evaluated through the incorporation method of...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Secondary metabolites; Antagonism; Inhibition of mycelial growth; Plant pathogenic fungi.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000100503
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Antiherbivory defense mechanisms along an environmental gradient in restinga Acta Botanica
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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Antimicrobial Activity and Phytochemical Screening of Euphorbia helioscopia Planta Daninha
WAHEED,K.; MUHAMMAD,S.K.; SHOMAILA,A.; MUHAMMAD,Z.; IZHAR,U.; ULLAH,S..
ABSTRACT: Medicinal Plants have been used throughout the world by human beings as a drug and remedies for various diseases since time immemorial. A study was planned to count into the antimicrobial activity and phytochemical screening of Euphorbia helioscopia. The plants were gathered and tested against some standard strains and some human pathogenic microorganisms i.e Escherichia coli, Bacillus Subtilis, Staphylococcus aureus, Klebsiella pneumoniae, Salmonella typhi, Pseudomonas aeruginosa and three fungal strain Trichoderma, R hizopus nigricans, Aspergillus niger. The concentrations of extracting samples (500 and 1,000 mg mL-1) were used against pathogens. Ciprofloxacin was used as positive control in case of bacterial strains and Colfrimazol was used...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ayurvedic; Euphorbiaceae; Labeena; Secondary metabolites; Indigenous.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100211
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Antimicrobial activity of natural products from Myracrodruon urundeuva Allemão (Aroeira-do-sertão) Plantas Medicinales
Lopes Gomes,Vangerlan Tiago; Pereira Chaves,Thiago; Batista Alencar,Laianne Carla; Coelho Dantas,Ivan; Dantas de Medeiros,Ana Cláudia; de Castro Felismino,Delcio.
Introduction: Myracrodruon urundeuva Allemão (Anacardiaceae) is a plant from the Brazilian semiarid region with medicinal properties against various diseases. Objective: to screen the phytochemistry and determine the antimicrobial activity of the hydroalcoholic extract from the bark of this plant. Methods: the extract was obtained by maceration and subjected to qualitative phytochemical tests and in vitro antimicrobial activity assays against gram-positive and gram-negative bacteria and fungi. Results: among the phytochemical compounds stood out tannins, flavonoids and alkaloids. The extract was effective against Staphylococcus aureus, Klebsiella pneumoniae and Enterococcus faecalis. Conclusions: Myracrodruon urundeuva presents compounds of high...
Tipo: Journal article Palavras-chave: Medicinal plants; Myracrodruon urundeuva; Semiarid; Ethnopharmacology; Secondary metabolites; Antimicrobial activity.
Ano: 2013 URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S1028-47962013000400004
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BIOLOGICAL ACTIVITIES AND NOVEL APPLICATIONS OF CHALCONES Planta Daninha
DÍAZ-TIELAS,C.; GRAÑA,E.; REIGOSA,M.J.; SÁNCHEZ-MOREIRAS,A.M..
ABSTRACT This review provides information on the biological activities of chalcones (whether natural or synthetic derivatives) on different organisms, as well as an overview of the functions and possible new applications of these plant secondary metabolites on crop protection, as eco-friendly pesticides and weed control agents. Naturally occurring chalcones have been used in traditional medicine for many years; however, recent scientific advances have shown that these molecules have a broad range of biological activities in a variety of organisms. A review on the major sources of chalcones and the main molecular events involved in the modes of action of these natural products is achieved. Chalcones are molecules with a broad spectrum of biological...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mode of action; Secondary metabolites; Crop protection; Pesticide; Fungicide; Antiviral; Phytotoxicity.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000300607
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Biological properties of Endophytic Fungi BABT
Sudha,Venkatesan; Govindaraj,Ramar; Baskar,Kathirvelu; Al-Dhabi,Naif Abdullah; Duraipandiyan,Veeramuthu.
The endophytic fungus is have rich source of secondary metabolites which act as biological active agent in the higher plants. The fungal derivatives play vital part in human life and their compounds are the source of drug for cancer, microbial and viral diseases. The natural compounds from the endophytes acts as growth inhibitor of plant pathogenic organism. Endophytes are rich sources of natural products which are used in agriculture (plant growth and insecticidal), pharmaceutical industries and also used for phytoremediation.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Endophytic fungi; Secondary metabolites; Anticancer; Phytoremediation; Pest management.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100413
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BIOPROSPECTING: A TOOL TO CONSERVE CHILEAN BRYOPHYTES Gayana Botánica
Cuvertino-Santoni,Jorge; Montenegro,Gloria.
Here, we present the current state of knowledge on the diversity of Chilean bryophytes (mosses, liverworts, and hornworts), the secondary metabolites present in these plants, and the biological activity of extracts from populations of Chilean species. Our goal is to establish the potential of these plants as a source of useful molecules for pharmaceutical and agricultural industries, thus promoting their conservation. Only 3,7% of Chilean bryophytes (55 spp.) have been analyzed using chemical characterization of their extracts (methanol, ether, ethanol, dichloromethane, acetone and hexane). Only four species from Chilean and Argentinian populations (Porella chilensis (Lehm. & Lindenb.) Trevi., Riccardiapolyclada (Mitt. ex Thurn) Hässel,...
Tipo: Journal article Palavras-chave: Mosses; Liverworts; Hornworts; Uses; Secondary metabolites; Biological activity; In vitro cultivation.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432013000100002
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Bioprospecting insecticidal compounds from plants native to Mato Grosso do Sul, Brazil Acta Botanica
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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Callus induction and bioactive phenolic compounds production from Byrsonima verbascifolia (L.) DC. (Malpighiaceae) Rev. Ciênc. Agron.
Castro,Ana Hortência Fonsêca; Braga,Karina de Queiroz; Sousa,Fernanda Marinez de; Coimbra,Mairon César; Chagas,Rafael César Russo.
ABSTRACT This study developed a methodology for callus induction in leaf segments of B. verbascifolia and evaluated the bioactive phenolic compounds production. Leaf explants were cultured in MS medium with 30 g L-1 sucrose, solidified with 7 g L- 1 agar supplemented with 2,4-D (0; 4.52; 9.05; 18.10 µM) and BAP (0; 4.44; 8.88; 17.75 µM ) in the presence and absence of light. Forty-five days after inoculation we assessed the percentage of callus induction, color, consistency, fresh and dry matter, total phenols, flavonoids, tannins contents, and chromatographic profile by HPLC-DAD method. Callus induction occurred only in medium with growth regulators. Maximal induction (100%) was found in medium containing 2,4-D combined with BAP in the presence and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cerrado; Medicinal plant; In vitro culture; Secondary metabolites.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000100143
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Causative Agents of Aspergillosis Including Cryptic Aspergillus Species and A. fumigatus OAK
豊留, 孝仁; TOYOTOME, Takahito.
アスペルギルス症は深在性真菌感染症の重要な位置を占めている.アスペルギルス症の原因真菌はAspergillus fumigatusが最も重要であるが,そのほかにもAspergillus flavusやAspergillus niger, Aspergillus terreusなども重要な原因菌種である.また,近年になって隠蔽種と呼ばれる各Aspergillus sectionの代表的な種に非常によく似た菌種の存在が認識され,一部のアスペルギルス症の原因となっていることも分かってきた.最近の研究で,それらの菌種間では抗真菌薬に対する感受性や二次代謝産物の産生プロファイル (エクソメタボローム) が異なることも明らかとなってきた.一方,治療中のA. fumigatusアゾール耐性化や近年の欧州を中心とした環境中アゾール耐性A. fumigatusの出現も報告され,これら菌種を正確に同定し,加えて感受性を評価することの重要性が高まってきている. 本総説ではA. fumigatusを含めたアスペルギルス症原因菌種,特に隠蔽種について触れ,エクソメタボローム解析を利用した同定の可能性を述べる.加えて,A. fumigatusアゾール系抗真菌薬耐性について最近の報告を交えて概説したい
Palavras-chave: Aspergillosis; Aspergillus spp.; Azole resistance; Cryptic species; Secondary metabolites.
Ano: 2016 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4396
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Characterization of the chemical composition of the essential oils from Annona emarginata (Schltdl.) H. Rainer 'terra-fria' and Annona squamosa L. Rev. Bras. Frutic.
Campos,Felipe Girotto; Baron,Daniel; Marques,Marcia Ortiz Mayo; Ferreira,Gisela; Boaro,Carmen Silvia Fernandes.
The objective of this study was to characterize the chemical composition of the essential oil from the leaves of Annona emarginata (Schltdl.) H. Rainer 'terra-fria' and Annona squamosa L. The species were grown in a greenhouse for 18 months, which nutrient solution was applied weekly; the plants were then harvested and the leaves dried to extract the essential oil. The essential oil was analyzed by gas chromatography and mass spectrometry to study its chemical profiles. Eleven substances were found in the essential oil of A. emarginata, primarily (E)-caryophyllene (29.29%), (Z)-caryophyllene (16.86%), γ-muurolene (7.54%), α-pinene (13.86%), and tricyclene (10.04%). Ten substances were detected in the oil from A. squamosa, primarily (E)-caryophyllene...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Annonaceae; Secondary metabolites; Terpenes; Pharmacological potential.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452014000500024
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Chemical composition fluctuations in roots of Plumbago scandens L. in relation to floral development Anais da ABC (AABC)
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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Daphnia magna Exudates Impact Physiological and Metabolic Changes in Microcystis aeruginosa ArchiMer
Bojadzija Savic, Gorenka; Edwards, Christine; Briand, Enora; Lawton, Linda; Wiegand, Claudia; Bormans, Myriam.
While the intracellular function of many toxic and bioactive cyanobacterial metabolites is not yet known, microcystins have been suggested to have a protective role in the cyanobacterial metabolism, giving advantage to toxic over nontoxic strains under stress conditions. The zooplankton grazer Daphnia reduce cyanobacterial dominance until a certain density, which may be supported by Daphnia exudates, affecting the cyanobacterial physiological state and metabolites’ production. Therefore, we hypothesized that D. magna spent medium will impact the production of cyanobacterial bioactive metabolites and affect cyanobacterial photosynthetic activity in the nontoxic, but not the toxic strain. Microcystin (MC-LR and des-MC-LR) producing M. aeruginosa PCC7806 and...
Tipo: Text Palavras-chave: Cyanobacteria; Secondary metabolites; PCC7806; Toxic; Mutant; Infochemicals.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00507/61893/65980.pdf
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Diversidad y caracterización de poblaciones bacterianas asociadas a esclerocios de Claviceps gigantea Fuentes et al. en maíz (Zea mays L.) con potencial antagonista, en el Estado de México. Colegio de Postgraduados
Ayala Torres, Ana María.
Un total de 129 aislamientos bacterianos obtenidos de la micósfera de esclerocios de Claviceps gigantea se evaluaron in vitro para determinar su capacidad de inhibir el crecimiento de Fusarium graminearum, F. subglutinans y F. verticillioides patógenos a maíz. Ensayos cualitativos en confrontación dual, resultaron en la selección de 22 aislamientos bacterianos con el mayor potencial antagónico hacia una, dos o las tres especies de Fusarium. Los aislamientos se identificaron molecularmente mediante secuenciación parcial del gen 16s ADNr. Las cepas con mayor grado de antagonismo pertenecen a los géneros Bacillus y Pseudomonas. La caracterización en la producción de metabolitos potencialmente involucrados en la actividad antagónica, mostró que el 100% de las...
Palavras-chave: Bacillus; Pseudomonas; Biocontrol; Metabolitos secundarios; Caracterización; Secondary metabolites; Characterization; Fitopatología; Maestría.
Ano: 2014 URL: http://hdl.handle.net/10521/2299
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Efeito do óleo essencial de Eucalyptus grandis no crescimento de isolados de fungos ectomicorrízicos em diferentes concentrações de cobre, zinco e níquel PFB - Pesquisa Florestal Brasileira
Steffen, Ricardo Bemfica; Antoniolli, Zaida Inês; Steffen, Gerusa Pauli Kist; Jacques, Rodrigo Josemar Seminoti; Echkardt, Daniel Pazzini; dos Santos, Marcos Leandro; Santana, Natielo Almeida.
Os metabólitos secundários bioativos de algumas plantas são capazes de estimular o crescimento dos fungos ectomicorrízicos. Quando em associação com plantas, esses fungos proporcionam as mesmas condições de se desenvolverem em ambientes contaminados por metais pesados. Avaliou-se o efeito da adição de óleo essencial de Eucalyptus grandis no crescimento de isolados ectomicorrízicos na presença de cobre, zinco e níquel. Os fungos ectomicorrízicos Pisolithus microcarpus (UFSC Pt 116) e Pisolithus sp. (UFSC Pt 24) foram incubados em meio de cultura líquido na presença de concentrações crescentes de cobre, zinco e níquel e de óleo essencial de Eucalyptus grandis na concentração de 20 μL L-1. Após período de incubação de 25 dias, avaliou-se a massa seca do...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Metais pesados; Metabólitos secundários; Ectomicorrizas Heavy metals; Secondary metabolites; Ectomycorrhizae..
Ano: 2011 URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/259
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Endophytic fungi from Myrcia guianensis at the Brazilian Amazon: distribution and bioactivity BJM
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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Eucalyptus essential oil action on mycorrhizal colonization and the establishment of Eucalyptus grandis in soil contaminated by copper PFB - Pesquisa Florestal Brasileira
Steffen, Ricardo Bemfica; Antoniolli, Zaida Inês; Steffen, Gerusa Pauli Kist; Jacques, Rodrigo Josemar Seminoti; da Silva, Rodrigo Ferreira.
The use of eucalyptus essential oil can optimize the growth of ectomycorrhizal isolates, which aid the establishment of forest species in soils contaminated by copper. The study aimed to determine the best application of eucalyptus essential oil in the formation of mycorrhizal seedlings of Eucalyptus grandis and its influence on the establishment of these seedlings in soil contaminated by copper. It was used the ectomycorrhizal fungi (fECM) Pisolithus microcarpus. The application forms of the essential oil were evaluated in a greenhouse, by means of six treatments. Subsequently, the seedlings were transplanted and evaluated in soil contaminated by copper, greenhouse and field. It was determined height, diameter, fresh and dry weight of shoots and roots,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Heavy metals; Secondary metabolites; Ectomycorrhizal Metais pesados; Metabólitos secundários; Fungos ectomicorrízicos.
Ano: 2011 URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/268
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Exploitation of trichoderma species on the growth of Pythium Aphanidermatum in Chilli BJM
Muthukumar,A.; Eswaran,A.; Sanjeevkumas,K..
Damping-off of chilli caused by Pythium aphanidermatum is a major nursery disease in vegetables. In vitro experiments evaluated the effect of eight isolates of Trichoderma species (from chilli rhizosphere) were tested against P. aphanidermatum. All the Trichoderma species had varied antagonistic effects against the pathogen. Among them, TVC3 recorded maximum growth inhibition of P. aphanidermatum and produced more amounts of volatile and non-volatile metabolites. The culture filtrate of the Trichoderma isolate TVC3 recorded complete inhibition on the mycelial growth of pathogen at 15% concentration. Moreover, chilli seeds treated with culture filtrate of the isolate TVC3 recorded maximum germination percentage, shoot length, root length and vigour index of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Capsicum annuum; Trichoderma species; Growth inhibition; Secondary metabolites; Plant growth promotion.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000400047
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