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Registros recuperados: 6
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Mating-induced transient inhibition of responses to sex pheromone in a male moth is not mediated by octopamine or serotonin Inra
Barrozo, R.; Jarriault, D.; Simeone, X.; Gaertner, C.; Gadenne, C.; Anton, S..
In the male moth, Agrotis ipsilon, mating induces a transient inhibition of behavioural and central nervous responses to sex pheromone. Newly mated males are not attracted to sex pheromone, and the sensitivity of their antennal lobe (AL) neurons is lower than in virgin males. This rapid transient olfactory inhibition prevents them from re-mating unsuccessfully until they have refilled their sex glands. We hypothesized that this olfactory ‘switch off’ might be controlled by neuromodulators such as biogenic amines. To test our hypothesis, we studied the effects of octopamine (OA) and serotonin (5-hydroxytryptamine, 5-HT) on the coding properties of pheromone-sensitive AL neurons in virgin and newly mated males. We show that AL neuron sensitivity increased in...
Tipo: Journal Article Palavras-chave: AGROTIS IPSILON; INSECTE; MITE; OLFACTION; ODEUR; LOBE ANTENNALE; PHEROMONE SEXUELLE; ATTRACTIF SEXUEL; SEROTONINE; PLASTICITE; SYSTEME NERVEUX CENTRAL; NEURONE; RECEPTEUR; OCTOPAMINE; NOCTUIDAE; LEPIDOPTERA OLFACTORY CODING; MOTH; ANTENNAL LOBE; SEX PHEROMONE; PROJECTION NEURON; MATING; OCTOPAMINE; SEROTONIN; PLASTICITY.
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010e7ad9fc3&uri=/notices/prodinra1/2010/09/
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Ordinary glomeruli in the antennal lobe of male and female tortricid moth Grapholita molesta (Busck) (Lepidoptera: Tortricidae) process sex pheromone and host-plant volatiles Inra
Varela, N.; Avilla, J.; Gemeno, C.; Anton, S..
Both sexes of Grapholita molesta, a key pest of stone fruits, are able to detect host-plant volatiles and the sex pheromone emitted by females, and to modify their behaviour accordingly. How olfactory information is processed in the central nervous system is unknown. Intracellular recordings and stainings were used to characterize antennal lobe (AL) neuron responses to single pheromone components, a behaviourally active blend of five peach volatiles and a pear-fruit ester. AL neurons with different response patterns responded to pheromone components and plant volatiles. In males more neurons responded specifically to the main pheromone component than in females, whereas neurons responding to all three pheromone components were more abundant in females....
Tipo: Journal Article Palavras-chave: LOBE ANTENNAIRE; CYDIA MOLESTA; ARTHROPODA; HEXAPODA; TORTRICIDAE; INSECTE; PHEROMONE SEXUELLE; ATTRACTIF SEXUEL; NEURONE; ODEUR; GLOMERULE GRAPHOLITA MOLESTA; OLFACTION; ANTENNAL LOBE; PHEROMONE; INTRACELLULAR RECORDING AND STAINING.
Ano: 2011 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD201157fcd7c0&uri=/notices/prodinra1/2011/03/
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Post-mating sexual abstinence in a male moth Inra
Barrozo, R.; Gadenne, C.; Anton, S..
In most animals, male copulation is dependent on the detection and processing of female-produced sex pheromones. In males, a refractory post-ejaculatory interval (PEI) follows copulation, allowing them to avoid direct remating until they have replenished their reproductive tracts. In the moth Agrotis ipsilon, newly mated males show a transient inhibition of behavioral and central nervous responses to sex pheromone. Using nonpheromonal (plant) odors, pheromones and their mixture, we now show that the observed lack of pheromone response originates from differential post-mating odor processing in the brain. Although mated males still respond to plant odors alone, their response to mixtures depends on the added pheromone concentration. Below a specific...
Tipo: Journal Article Palavras-chave: PLANTE; ODEUR; LOBE ANTENNAIRE; PLASTICITE; ABSTINCENCE SEXUELLE; AGROTIS IPSILON; SYSTEME NERVEUX CENTRAL; COMPORTEMENT; LEPIDOPTERA; INSECTE LEPIDOPTERA; NOCTUIDAE; MOTH; OLFACTION; MATING; PHEROMONE; PLANT ODOUR; ANTENNAL LOBE; PLASTICITY.
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010305acd70&uri=/notices/prodinra1/2011/01/
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Quantitative analysis of sex-pheromone coding in the antennal lobe of the moth Agrotis ipsilon: a tool to study network plasticity Inra
Jarriault, D.; Gadenne, C.; Rospars, J.P.; Anton, S..
To find a mating partner, moths rely on pheromone communication. Released in very low amounts, female sex pheromones are used by males to identify and localize females. Depending on the physiological state (i.e. age, reproductive state), the olfactory system of the males of the noctuid moth Agrotis ipsilon is `switched on or off'. To understand the neural basis of this behavioural plasticity, we performed a detailed characterization of the qualitative, quantitative and temporal aspects of pheromone coding in the primary centre of integration of pheromonal information, the macroglomerular complex (MGC) of the antennal lobe. MGC neurons were intracellularly recorded and stained in sexually mature virgin males. When stimulating antennae of males with the...
Tipo: Journal Article Palavras-chave: AGROTIS IPSILON; ARTHROPODA; HEXAPODA; INSECTE; PHEROMONE; MITE; PLASTICITE; ATTRACTIF SEXUEL; NEURONE; OLFACTION; LOBE ANTENNAIRE OLFACTORY CODING; MOTH; ANTENNAL LOBE; SEX-PHEROMONE; PROJECTION NEURON; SPIKE TRAIN ANALYSIS.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010352d8cb4&uri=/notices/prodinra1/2010/10/
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Switching attraction to inhibition: mating-induced reversed role of sex pheromone in an insect Inra
Barrozo, R.; Gadenne, C.; Anton, S..
In the moth, Agrotis ipsilon, newly mated males cease to be attracted to the female-produced sex pheromone, preventing them from re-mating until the next night, by which time they would have refilled their reproductive glands for a potential new ejaculate. The behavioural plasticity is accompanied by a decrease in neuron sensitivity within the primary olfactory centre, the antennal lobe (AL). However, it was not clear whether the lack of the sexually guided behaviour results from the absence of sex pheromone detection in the ALs, or if they ignore it in spite of detection, or if the sex pheromone itself inhibits attraction behaviour after mating. To test these hypotheses, we performed behavioural tests and intracellular recordings of AL neurons to...
Tipo: Journal Article Palavras-chave: AGROTIS IPSILON; NOCTUIDAE; LEPIDOPTERA; INSECTE; ATTRACTIF SEXUEL; PHEROMONE SEXUELLE; MITE; ODEUR; PLANTE; NEURONE; PHYSIOLOGIE SENSORIELLE; LOBE ANTENNAIRE; PLASTICITE MOTH; OLFACTION; MATING; SEX PHEROMONE; PLANT ODOUR; PLASTICITY; ANTENNAL LOBE.
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20107e58cbab&uri=/notices/prodinra1/2010/09/
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Three-dimensional antennal lobe atlas of the oriental fruit moth, Cydia molesta (Busck) (Lepidoptera: Tortricidae): comparison of male and female glomerular organization Inra
Varela, N.; Couton, L.; Gemeno, C.; Avilla, J.; Rospars, J.P.; Anton, S..
The oriental fruit moth Cydia molesta is an important pest and the behavioural role of olfactory signals such as pheromones and plant volatiles have been studied extensively in both sexes. To understand odour processing further, however, detailed knowledge of the anatomy of the olfactory system is crucial. In the present study, an atlas of the antennal lobe (AL) is presented based on the three-dimensional reconstructions of both ALs of three male and three female brains by means of neuroanatomical and computational approaches. We identified 48-49 "ordinary" glomeruli and one large glomerulus situated at the entrance of the antennal nerve in males, and 49-52 "ordinary" glomeruli and one large glomerulus in the ventro-medial part of the AL in females....
Tipo: Journal Article Palavras-chave: LOBE ANTENNAIRE; MITE; PHEROMONE; LEPIDOPTERA; TORTRICIDAE; GLOMERULE; INSECTE; COMPORTEMENT ANIMAL; ATTRACTIF SEXUEL; CARTE TRIDIMENSIONNELLE; CARTOGRAPHIE OLFACTION; COMPUTATIONAL NEUROANATOMY; ATLAS; ANTENNAL LOBE; ORIENTAL FRUIT MOTH; CYDIA MOLESTA.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010c0e61cd2&uri=/notices/prodinra1/2011/05/
Registros recuperados: 6
Primeira ... 1 ... Última
 

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