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Registros recuperados: 14
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Analyse de sterols d'insectes phytophages par spectrometrie de masse National Institute of Agronomic Research
Duperon, P.; Hügel, M.F.; Šipal, Z.; Barbier, M..
1. 1. Sterold have been extracted from 3 insects, Calotermes flavicollis, Gryllus domesticus and Apis mellifica, and their characteristics determined by means of mass spectrometer. 2. 2. Cholesterol is the principal sterol of Calotermes and Gryllus. 3. 3. The principal sterol in Apis is 24-methylene cholesterol. 4. 4. The presence of minor sterols is reported.
Tipo: Journal Article-postprint Palavras-chave: HONEYBEE; APIS MELLIFERA; APIDAE; HYMENOPTERA; SOCIAL INSECT; INSECT; CALOTERMES FLAVICOLLIS; GRILLUS DOMESTICUS; STEROLD; CHOLESTEROL; STEROL; MASS SPECTROMETRY; ABEILLE DOMESTIQUE; INSECTE SOCIAL; INSECTE; CALOTERMES FLAVICOLLIS; GRILLUS DOMESTICUS; STEROLD; CHOLESTEROL; STEROL; SPECTOMETRIE DE MASSE.
Ano: 1964 URL: http://hdl.handle.net/2174/448
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Biochemical approach to muscular function in insects National Institute of Agronomic Research
Maruyama, K..
Tipo: Journal Article-postprint Palavras-chave: INSECT; MUSCLE; FUNCTION; BIOCHEMISTRY; PROTEIN; ACTOMYOSIN; ATP; INSECTE; MUSCLE ALAIRE; FONCTION; BIOCHIMIE; PROTEINE; ACTOMYOSIN; ADENOSINE TRIPHOSPHATE.
Ano: 1957 URL: http://hdl.handle.net/2174/469
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Differences in oviposition behaviour of two sympatric sibling species of the Ostrinia genus Inra
Malausa, T.; Pélissié, B.; Piveteau, V.; Bourguet, D.; Ponsard, S..
Changes in host preferences are thought to be a major source of genetic divergence between phytophagous insect taxa. In western Europe, two sympatric taxa, O. nubilalis (the European corn borer) and O. scapulalis, feed mainly on maize and hop or mugwort, respectively. These two species may have diverged without geographic isolation after a host shift of ancestral populations onto maize or another cultivated species (e.g. sorghum). A previous study using inbred laboratory strains revealed that the two species differ in their oviposition choices in maize-mugwort tests. We sampled four natural populations in France (two of each taxon) and tested their oviposition behaviour toward four of their main host plant species: maize, sorghum, mugwort and hop. O....
Tipo: Journal Article Palavras-chave: SYMPATRIC SPECIATION; ECOLOGICAL SPECIATION; OSTRINIA NUBILALIS; OSTRINIA SCAPULALIS; EUROPEAN CORN BORER; HOST RACE; OST PREFERENCE; INSECT; COMPORTEMENT; COMPORTEMENT; EESPECE SYMPATRIQUE.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD200960c6c0b&uri=/notices/prodinra1/2011/04/
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Egg dispersion in codling moth : influence of egg extract and of its fatty acid constituents Inra
Thiéry, D.; Gabel, B.; Farkas, P.; Jarry, M..
Codling moth females (Cydia pomonella, Lepidoptera: Tortricidae) (CM) usually lay single eggs and have a tendency to disperse. In a first experiment we observed that single females exposed to 20 apples distribute their eggs regularly among apples, suggesting a dispersive oviposition behavior. In a dual-choice situation, isolated females avoided oviposition on areas of cardboard treated with a methylene dichloride egg extract at the dose of ca. 1.0 egg equivalent/cm². A strong avoidance was obtained in response to a 20-fold dose, which was accompanied by a significant reduction of total oviposition. Seven major compounds found by GC analyses in the methylene dichloride extract of 2 to 3-day-old eggs were saturated or unsaturated C14-C18 straight-chain fatty...
Tipo: Journal Article Palavras-chave: LEPIDOPTERE; CYDIA POMONELLA; OEUF; OVIPOSITION; COMPOSITION CHIMIQUE BEHAVIOR; CYDIA POMONELLA; OVIPOSITION; PHEROMONE; SYNOMONE; INSECT; OFFSPRING DISPERSION; FATTY ACIDS; EGG AGE; LEPIDOPTERA; TORTRICIDAE.
Ano: 1995 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB9600002471059162&uri=/notices/prodinra1/2010/11/
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Electron microscope observations on the calyces of the insect brain National Institute of Agronomic Research
Trujillo-Cenóz, O.; Melamed, J..
The pedunculate bodies consist of three fibrillar regions: calyces, stalk, and roots. A group of small association neurons (the globule cells) lies within and around the calyces. The synaptic region of the calyces shows, under the phase contrast microscope, small, dense circumscribed areas of neuropil corresponding to the so-called “glomeruli” of light microscopists. The electron microscope demonstrated that each glomerulus consists of a large central nerve ending and several thin peripheral fibers. The central ending is filled with small vesicles. Mitochondria and dense granules are found intermixed with the vesicular material. The peripheral fibers contain mitochondria, slender tubules, and a few vesicles. The origin of the central ending and...
Tipo: Journal Article-postprint Palavras-chave: INSECT; BRAIN; NEURONE; PEDUNCULATE BODY; CALYCE; ELECTRON MICROSCOPE; INSECTE; CERVEAU.
Ano: 1962 URL: http://hdl.handle.net/2174/513
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Epicuticular waxes and plant primary metabolites on the surfaces of juvenile Eucalyptus globulus and E.nitens (Myrtaceae) leaves Inra
Steinbauer, M. J.; Davies, N. W.; Gaertner, C.; Derridj, S..
Our knowledge of the composition of the waxes on the surfaces of Eucalyptus leaves is growing but that of plant primary metabolites has been completely overlooked. The diffusion of primary metabolites above the cuticle exposes them to a variety of herbivorous taxa and has the potential to influence their responses to that plant. Juvenile leaves of two families of Eucalyptus globulus Labill. ssp. globulus and two families of E. nitens (Deane & Maiden) Maiden had 11 out of 16 of the epicuticular waxes that were detected in common. However, two phenylethyl esters (waxes) were only detected on leaves of one family of E. globulus and two benzyl esters (waxes) were not detected or were uncommon in samples from E. nitens. Wax compounds were generally found in...
Tipo: Journal Article Palavras-chave: INSECTE; AUTOMNE; MITE; FEUILLE; ACIDE AMINE; EUCALYPTUS; METABOLISME; EUCALYPTUS GLOBULUS; METABOLISME PRIMAIRE; EUCALYPTUS NITENS; MYRTACEAE; ANALYSE STATISTIQUE; GLUCIDE; SUCRE; POLYOL; ACIDE MALIQUE; ACIDE GAMMA AMINOBUTYRIQUE AUTUMN GUM MOTH; MYCOSPHAERELLA LEAF DISEASE; AMINO-ACID COMPOSITIONS; MNESAMPELA-PRIVATA; MAYETIOLA-DESTRUCTOR; HESSIAN FLY; OVIPOSITION; INSECT; SUSCEPTIBILITY; CHEMICALS.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD201053aa4348&uri=/notices/prodinra1/2010/10/
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Identification of parasite-responsive cysteine proteases in Manduca Sexta Inra
Serbielle, C.; Moreau, S.; Veillard, F.; Voldoire, E.; Bézier, A.; Mannucci, M.A.; Volkoff, A.N.; Drezen, J.M.; Lalmanach, G.; Huguet, E..
Parasites have evolved different virulence strategies to manipulate host physiological functions. The parasitoid wasp Cotesia congregata induces developmental arrest and immune suppression of its Lepidopteran host Manduca sexta. In this interaction, a symbiotic virus (C. congregata Bracovirus, CcBV) associated with the wasp is essential for parasitism success. The virus is injected into the host with wasp eggs and virus genes are expressed in host tissues. Among potential CcBV virulence genes, cystatins, which are tight binding inhibitors of C1A cysteine proteases, are suspected to play an important role in the interaction owing to their high level of expression. So far, however, potential in vivo targets in M. sexta are unknown. Here, we characterized for...
Tipo: Journal Article Palavras-chave: BRACOVIRUS; CATHEPSIN; CYSTATIN; INSECT; PARASITOID WASP; POLYDNAVIRUS.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD201122872ac1&uri=/notices/prodinra1/2011/05/
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Isolation and characterization of microsatellites in the harlequin ladybird Harmonia axyridis (Coleoptera, Coccinellidae) and cross-species amplification within the family Coccinellidae Inra
Loiseau, A.; Malausa, T.; Lombaert, E.; Martin, J.F.; Estoup, A..
A total of 18 microsatellite DNA loci were isolated and characterized from the harlequin ladybird, Harmonia axyridis (Coleoptera: Coccinellidae). We optimized a multiplex panel consisting of two polymerase chain reactions, allowing the genotyping of all loci. The number of alleles and heterozygosity observed at each locus ranged from 1 to 12 and from 0 to 100%, respectively. After Bonferroni correction for multiple tests, none of the loci deviated significantly from Hardy-Weinberg equilibrium and there was no indication of significant linkage disequilibrium among pairs of loci. Successful cross-species amplification was obtained for only three of the seven tested species of Coccinellidae
Tipo: Journal Article Palavras-chave: COCCINELLE; COLEOPTERE; ESPECE INVASIVE; MICROSATELLITE BIOLOGICAL INVASION; INSECT; INVASIVE SPECIES; MICROSATELLITES; NUCLEAR MARKER.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD200946b6d228&uri=/notices/prodinra1/2010/08/
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Modes of phagocytosis of Gram-positive and Gram-negative bacteria by Spodoptera littoralis granular haemocytes Inra
Costa, S.C.P.; Ribeiro, C.; Girard, P.A.; Zumbihl, R.; Brehélin, M..
Haemocytes are the main immunocompetent cells in insect cellular immune reactions. Here, we show that in Spodoptera littoralis, granular haemocytes are the primary phagocyte haemocytes, both in vivo and in vitro. The "trigger" and "zipper" modes of engulfment known in mammal macrophages are active, in vivo, in S. littoralis granular haemocytes, together with macropinocytosis. Lipopolysaccharide as well as lipoteichoic acid inhibit the binding of both Gram-positive (Corynebacterium xerosis) and Gramnegative (Escherichia coli) bacteria on granular haemocytes. In addition, different ligands can inhibit the binding of E coli. Most of these inhibitors are known as ligands of scavenger receptors in mammal macrophages and we hypothesise that one of the receptors...
Tipo: Journal Article Palavras-chave: SPODOPTERA LITTORALIS; NOCTUELLE MACROPINOCYTOSIS; TRIGGER; ZIPPER; RECEPTOR; INSECT.
Ano: 2005 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD201069bfa10d&uri=/notices/prodinra1/2011/05/
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Oviposition response of Lobesia botrana females to long-chain free fatty acids and esters from its eggs Inra
Gabel, B.; Thiéry, D..
Avoidance of occupied ovisposition sites supposes that females perceive information related to their own progency. Fatty acids identified from egg extracts have been reevaluated using a different extraction method, and we have investigated the dose-dependent oviposition response of European grape vine moths (Lobesia botrana) to myristic acid, palmitic acid, palmitoleic acid, stearic acid, oleic acid, linoleic acid, methyl palmitate, methyl oleate, and ethyl palmitate; all except ethyl palmitate have been identified from eggs of L. botrana. A methylene dichloride extract of eggs from L. botrana revealed the presence of saturated free fatty acids (myristic, palmitic, and stearic) and unsaturated acids (palmitoleic, oleic, linoleic, and linolenic) in amounts...
Tipo: Journal Article Palavras-chave: LOBESIA; LEPIDOPTERE; MARQUEUR CHIMIQUE; OVIPOSITION; OEUF BEHAVIOR; LOBESIA BOTRANA; OVIPOSITION; INSECT; TORTRICID; LEPIDOPTERA; FATTY ACIDS.
Ano: 1996 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB9600002472059163&uri=/notices/prodinra1/2010/11/
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Recent insight into the pathogenicity mechanisms of the emergent pathogen Photorhabdus asymbiotica Inra
Costa, S.C.P.; Chavez, C.V.; Jubelin, G.; Givaudan, A.; Escoubas, J.M.; Brehélin, M.; Zumbihl, R..
Photorhabdus asymbiotica is unique among the entomopathogenic bacteria of this genus in also being able to infect humans, leading to its isolation from some clinical samples. Recent comparative genomics data and the results of studies of interactions between bacteria and cells provide insight into the adaptation of this bacterium to its new niche, the human body
Tipo: Journal Article Palavras-chave: PHOTORABDUS ASYMBIOTICA; EMERGENT PATHOGEN; INSECT; MAN; COMPARATIVE GENOMICS; PHAGOCYTOSIS; APOPTOSIS; VIRULENCE FACTORS.
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010764fee76&uri=/notices/prodinra1/2010/10/
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Some experiments concerning thermal adjustment and respiratory metabolism in insects National Institute of Agronomic Research
Agrell, Ivar.
The aim of the investigation is to make a contribution to the problem in what degree the thermal reaction of the respiratory metabolism in insects is qualitatively or quantitatively changed when subjected experimentally for some length of time to variations in the thermal environment. The material under investigation consists of imagines of Stauroderus bicolor CHARP. (Orthoptera), Formica rufa L. (Hymenoptera), Stomoxys calcitrans L. (Diptera), Forficula auricularia L. (Dermaptera), larvae of Ephestia kühniella Z. (Lepidoptera) and Byrrhus pilula L. (Coleoptera), as well as pupae of Phalera bucephala L. (Lepidoptera). The test groups of the different species examined are transferred from an originally uniform environment, i.e. the same limited habitat to...
Palavras-chave: INSECT; THERMOREGULATION; RESPIRATORY METABOLISM; INSECTE; THERMOREGULATION; METABOLISME RESPIRATOIRE.
Ano: 1947 URL: http://hdl.handle.net/2174/481
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Vitamin A in the vision of insects National Institute of Agronomic Research
Goldsmith, Timothy H.; Warner, Lana T..
Acetone-methanol extracts of honeybees (Apis mellifera) were chromatographed from petroleum ether on columns of aluminum oxide and magnesium oxide:celite. Vitamin A1 was identified by the Carr-Price (antimony chloride) reaction. These experiments provide the first demonstration of vitamin A in the tissues of an insect. Like retinene, vitamin A is confined to the heads and is not found in either thoraces or abdomens. Dark-adapted bees have very little vitamin A. During light adaptation the vitamin A increases, but at the expense of retinene, which decreases. As much as 0.1 µg of vitamin A/gm of heads has been recovered from light-adapted bees. Two methods are described for demonstrating the enzymic reduction of retinene to vitamin A, using an extract of the...
Tipo: Journal Article-postprint Palavras-chave: INSECT; HONEYBEE; VITAMIN A; HEAD; INSECTE; APIS MELLIFERA; VITAMINE A; TETE; LUMIERE.
Ano: 1964 URL: http://hdl.handle.net/2174/521
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Water taste transduction pathway is calcium dependent in Drosophila Inra
Meunier, N.; Marion-Poll, F.; Lucas, P..
In mammals, detection of osmolarity by the gustatory system was overlooked until recently. In insects, specific taste receptor neurons detect hypoosmotic stimuli and are commonly called “W” (water) cells. W cells are easy to access in vivo and represent a good model to study the transduction of hypoosmotic stimuli. Using pharmacological and genetic approaches in Drosophila, we show that tarsal W cell firing activity depends on the concentration of external calcium bathing the dendrite. This dependence was confirmed by the strong inhibition of W cell responses to hypoosmotic stimuli by lanthanum (IC50 = 8 nM), an ion known to inhibit calcium-permeable channels. Downstream, the transduction pathway likely involves calmodulin because calmodulin antagonists...
Tipo: Journal Article Palavras-chave: DROSOPHILA; ARTHROPODA; HEXAPODA; INSECTE; NEURONE; RECEPTEUR; STIMULUS HYPOOSMOTIQUE; GOUT; SENSATION; EAU; CALCIUM; CALMODULINE; OSMOLARITE  CALMODULIN; HYPOOSMOTIC; INSECT; OSMOLARITY; PKC; TRANSDUCTION.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20104d76cadf&uri=/notices/prodinra1/2010/10/
Registros recuperados: 14
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