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See detailUn phéochromocytome aux multiples mutations
VROONEN, Laurent ULg; Maiga, Ibrahima ULg; Persu, A et al

in Abstract book - Annales d'Endocrinologie : 31ème Congrès de la Société Françaose d'Endocrinologie, Lyon 5-8 novembre 2014 (2014, October)

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See detailUne phéromone sexuelle chez la coccinelle asiatique, Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae)
Fassotte, Bérénice ULg; Fischer, Christophe ULg; Durieux, Delphine ULg et al

Conference (2014, October)

A ce jour, aucune phéromone sexuelle n’a pu être mise en évidence chez les Coccinellidae. Cependant, diverses études suggèrent que de telles molécules sont impliquées dans la communication sexuelle chez ... [more ▼]

A ce jour, aucune phéromone sexuelle n’a pu être mise en évidence chez les Coccinellidae. Cependant, diverses études suggèrent que de telles molécules sont impliquées dans la communication sexuelle chez les coccinelles. Afin de vérifier cette hypothèse, nous avons collecté les composés organiques volatils émis par la coccinelle asiatique, Harmonia axyridis (Pallas), en présence ou en absence de pucerons. En présence de pucerons, les femelles vierges présentent un « comportement d’appel » qui est notamment associé à l’émission d’une phéromone sexuelle volatile chez plusieurs espèces de Coléoptères. D’autre part, des tests éthologiques ont démontré que les femelles émettent des composés volatils qui attirent les mâles à distance. Enfin, les prélèvements ont été analysés par chromatographie en phase gazeuse couplée à la spectrométrie de masse. Les analyses ont mis en évidence cinq composés volatils spécifiques provenant des femelles, aucun d’entre eux n’étant émis pas les mâles. L’identification a révélé la présence de (–)-β-caryophyllène, de β-élémène, de méthyl-eugénol, d’α-humulène et d’α-bulnésène, exclusivement produits par les femelles nourries de pucerons et dont les quantités respectives augmentent progressivement au cours de la période de prélèvement. Les résultats confirment donc que les femelles H. axyridis produisent une phéromone sexuelle volatile. Ceux-ci devraient permettre de promouvoir le développement de méthodes de gestion plus efficaces afin de manipuler les mouvements de cette coccinelle invasive et de réduire les impacts négatifs qu’elle occasionne sur la biodiversité. [less ▲]

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See detailPheromone variability and evolution in the butterfly genus Bicyclus, and implication in its diversification
Bacquet, Paul; Brattström, O.; Brakefield, P. M. et al

Poster (2010, May 05)

The evolution of olfactive communication in generating reproductive isolation among species remains poorly understood (Smadja & Butlin 2009). In Lepidoptera, studies have mainly focused on long-distance ... [more ▼]

The evolution of olfactive communication in generating reproductive isolation among species remains poorly understood (Smadja & Butlin 2009). In Lepidoptera, studies have mainly focused on long-distance pheromones produced by moths. Moth sex pheromones have been shown to display inter-population variation (e.g. Tòth et al. 1992, McElfresh & Millar 2008 and ref. within, Groot et al. 2009) and to be involved in interspecific isolation (e.g. Löfstedt et al. 1991, Groot et al. 2006). In butterflies, the few existing studies on sex pheromones have mainly focused on the identification of the male specific compounds and the demonstration of their behavioural activity in courtship (e.g. Grula et al. 1980, Nieberding et al. 2008, Yildizhan et al. 2009), but have failed so far to highlight a role in reproductive isolation (Friberg et al. 2008). In the species-rich Bicyclus genus Kirby, 1871 (Nymphalidae, Satyrinae) the structures producing the pheromones, i.e. the androconia, are key characters to discriminate among species (Condamin 1973). In B. anynana (Butler, 1879), the male sex pheromone (MSP) has been shown to play a role in mate choice (Costanzo & Monteiro 2007, Nieberding et al. 2008), to be heritable, and particular ratios of the pheromone components are under strong sexual selection (Nieberding et al, unpubl. data). Therefore, we expect that pheromone evolution is responsible for reproductive isolation and diversification in this butterfly group. In this framework, our research project aims at understanding the evolution of MSP at the interspecific level across the Bicyclus genus and specifically at testing their potential role in the speciation process. Potential MSP of several species across the Bicyclus genus have been identified by gas chromatography and mass spectrometry. Observed differences in pheromone composition between species are compared in a phylogenetic framework to the molecular tree of the species (following Oliver et al. 2009). We expect the evolutionary rate of MSP to be unlinked to the molecular tree if MSP are under sexual selection across the genus (i.e. saltational evolution following Symonds & Elgar 2004, Shirangi et al. 2009). Moreover, if MSP generated reproductive isolation between species in a “reinforcement” process, we expect higher differences of MSP composition between sympatric species than between allopatric species and an increase of this pattern for younger species compared to older species (Lukhtanov et al. 2006). [less ▲]

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See detailA pheromone-based formulation against phytophagous pests
Fassotte, Bérénice ULg; Vandereycken, Axel ULg; Heuskin, Stéphanie ULg et al

Poster (2014, April 02)

Innovative integrated pest management methods are needed to overcome market withdrawal of synthetic pesticides. Therefore, the identification of environment-friendly bio-products carrying direct or ... [more ▼]

Innovative integrated pest management methods are needed to overcome market withdrawal of synthetic pesticides. Therefore, the identification of environment-friendly bio-products carrying direct or indirect biocide activity is one promising alternative option. Our researches focus on the identification of appropriate formulations releasing volatile organic compounds that are attractive for natural enemies of insect pests. However, the elaboration of slow-release devices that ensure stable and controlled release of active volatile compounds is quite challenging. Here, we developed a formulation based on E-β-farnesene and (–)-β-caryophyllene, these two semiochemicals having strong attractive potential on aphid natural enemies including ladybeetles and hoverflies. Both compounds were encapsulated together in alginate gel beads. The blend efficiency is currently being evaluated through laboratory and field assays. [less ▲]

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See detailPheromone-based management strategies to control the tomato leafminer, Tuta absoluta (Lepidoptera: Gelechiidae). A review
Caparros Megido, Rudy ULg; Haubruge, Eric ULg; Verheggen, François ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2013), 17(3), 475-482

We here review pheromone control strategies for species-specific and environmentally safe management of the tomato leafminer, Tuta absoluta (Lepidoptera: Gelechiidae). This insect pest originates from ... [more ▼]

We here review pheromone control strategies for species-specific and environmentally safe management of the tomato leafminer, Tuta absoluta (Lepidoptera: Gelechiidae). This insect pest originates from South America and is now considered to be one of the most damaging invasive pests of tomatoes in the Mediterranean Basin countries of Europe and North Africa. After presenting the general principles of sex pheromone-based control strategies, we describe strategies used to control T. absoluta including pest detection, population monitoring, mass annihilation and mating disruption techniques. [less ▲]

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See detailPheromones and semiochemicals in animal communication: overview and chemistry
Denoël, Thibaut ULg

Scientific conference (2012)

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See detailPheromones are involved in the control of sexual behaviour in birds.
Balthazart, Jacques ULg; Schoffeniels, E.

in Naturwissenschaften (Die) (1979), 66(1), 55-6

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See detailLes phéromones humaines: vestige animal ou réalité non reconnue
Foidart, Agnès ULg; Legros, Jean-Jacques ULg; Balthazart, Jacques ULg

in Revue Médicale de Liège (1994), 49(12), 662-80

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See detailPheromones in birds: myth or reality?
Caro, Samuel P; Balthazart, Jacques ULg

in Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural and Behavioral Physiology (2010), 196(10), 751-66

Birds are anosmic or at best microsmatic... This misbelief persisted until very recently and has strongly influenced the outcome of communication studies in birds, with olfaction remaining neglected as ... [more ▼]

Birds are anosmic or at best microsmatic... This misbelief persisted until very recently and has strongly influenced the outcome of communication studies in birds, with olfaction remaining neglected as compared to acoustic and visual channels. However, there is now clear empirical evidence showing that olfaction is perfectly functional in birds and birds use olfactory information in a variety of ethological contexts. Although the existence of pheromones has never been formally demonstrated in this vertebrate class, different groups of birds, such as petrels, auklets and ducks have been shown to produce specific scents that could play a significant role in within-species social interactions. Behavioral experiments have indeed demonstrated that these odors influence the behavior of conspecifics. Additionally, in quail, deprivation of olfactory inputs decreases neuronal activation induced by sexual interactions with a female. It seems therefore well established that birds enjoy a functional sense of smell and a fast growing body of experimental evidence suggests that they use this channel of olfactory communication to control their social life. The unequivocal identification of an avian pheromone is, however, still ahead of us but there are now many exciting opportunities to unravel the behavioral and physiological particularities of chemical communication in birds. [less ▲]

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See detailPhEVER: a database for the global exploration of virus–host evolutionary relationships
Palmeira, Leonor ULg; Penel, Simon; Lotteau, Vincent et al

in Nucleic Acids Research (2011)

Fast viral adaptation and the implication of this rapid evolution in the emergence of several new infectious diseases have turned this issue into a major challenge for various research domains. Indeed ... [more ▼]

Fast viral adaptation and the implication of this rapid evolution in the emergence of several new infectious diseases have turned this issue into a major challenge for various research domains. Indeed, viruses are involved in the development of a wide range of pathologies and understanding how viruses and host cells interact in the context of adaptation remains an open question. In order to provide insights into the complex interactions between viruses and their host organisms and namely in the acquisition of novel functions through exchanges of genetic material, we developed the PhEVER database. This database aims at providing accurate evolutionary and phylogenetic information to analyse the nature of virus–virus and virus–host lateral gene transfers. PhEVER (http://pbil.univ-lyon1.fr/databases/phever) is a unique database of homologous families both (i) between sequences from different viruses and (ii) between viral sequences and sequences from cellular organisms. PhEVER integrates extensive data from up-to-date completely sequenced genomes (2426 non-redundant viral genomes, 1007 non-redundant prokaryotic genomes, 43 eukaryotic genomes ranging from plants to vertebrates) and offers a clustering of proteins into homologous families containing at least one viral sequences, as well as alignments and phylogenies for each of these families. Public access to PhEVER is available through its webpage and through all dedicated ACNUC retrieval systems. [less ▲]

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See detailPhilippe Corcuff : Où est passée la critique sociale ?
Jacquemain, Marc ULg

in Revue Française de Science Politique (2012), A paraître

Dans son ouvrage "Ou est passée la critique sociale ?", Philippe Corcuff nous propose un parcours à travers les théories sociologique contemporaines qui abordent la critique. Il propose de ne pas tenter ... [more ▼]

Dans son ouvrage "Ou est passée la critique sociale ?", Philippe Corcuff nous propose un parcours à travers les théories sociologique contemporaines qui abordent la critique. Il propose de ne pas tenter de résoudre les grandes antinomies de la sociologie mais de les laisser "en tention". [less ▲]

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See detailPhilippe de Mézières et son Epistre au roi Richart
Marchandisse, Alain ULg

in Moyen Age (Le) (2010), 116

In mid-May 1395, Philippe de Mézières writes a Letter to king Richard II of England, an urgent call, which does not belong to the epistolary but to the allegorical and the mirror for princes genre. This ... [more ▼]

In mid-May 1395, Philippe de Mézières writes a Letter to king Richard II of England, an urgent call, which does not belong to the epistolary but to the allegorical and the mirror for princes genre. This letter, revealing a clear similarity of thought between the author and the king of France, Charles VI, to whose education the former contributed, is preserved as a unique manuscript, the Royal 20 B VI, in the British Library. This manuscript turns out to be the one offered to the English monarch and, being addressed to the latter, ended up in the hands of a prince, who was particularly able to appreciate its meaning and all its wit. Although Mézières advocates a reconciliation between the kings of France and England, to be sealed with a marriage between Isabelle de Valois, the former’s oldest daughter and the latter, which was the safest way to achieve his ultimate aim of a reconciliation within the Church and the re-conquest of the Holy Land, what he truly hoped for was the founding of the Order of the Passion of Jesus Christ. [less ▲]

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See detailPhilippe Djian, "Oh..."
Dechêne, Antoine ULg

Article for general public (2014)

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See detailPhilippe Dubois, L'Acte photographique
Durand, Pascal ULg

in Liège université (1983), 30

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See detailPhilippe II, roi d'Espagne
Kurth, Godefroid ULg

Book published by Spée-Zelis (1877)

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See detailPhilippe Jaenada, Sulak
Dechêne, Antoine ULg

Article for general public (2014)

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See detailPhilippeville - Rosée: notice explicative de la carte géologique de la Wallonie
Boulvain, Frédéric ULg; Marion, Jean-Marc ULg

Book published by Ministère de la Région wallonne, DGRNE (1994)

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See detailPhillips, Caryl
Ledent, Bénédicte ULg

in Palmer, Colin (Ed.) Encyclopedia of African-American Culture and History: The Black Experience in the Americas (2006)

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See detailPhilologie et Critique Génétique. Enjeux théoriques de l'édition des manuscrits de Saussure"
Sofia, Estanislao ULg

in Cahiers Ferdinand de Saussure (2011), 64

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