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See detailNaturalization and impact of a horticultural species, Cotoneaster horizontalis (Rosaceae) in biodiversity hotspots in Belgium
Piqueray, Julien ULg; Mahy, Grégory ULg; Vanderhoeven, Sonia

in Belgian Journal of Botany (2008), 141

Cultivation of ornamental plant species has been recognized to foster plant naturalization of exotics by counteracting environmental stochasticity and continuously providing propagules. As a preliminary ... [more ▼]

Cultivation of ornamental plant species has been recognized to foster plant naturalization of exotics by counteracting environmental stochasticity and continuously providing propagules. As a preliminary attempt to describe the invasion status of C horizontalis, we gathered information on the occurrence of the species in Belgium by compiling various databases. We assessed the naturalization status of C. horizontalis in Belgian calcareous grasslands, high-value habitats recognized as biodiversity hotspots, by characterizing its occurrence, population status, preferred habitats, invaded communities, growth rate and fruiting capacity. We also assessed the impact of the species on calcareous grasslands communities and on individual species. Cotoneaster occurred in seven of the nine investigated sites, with densities varying from 0.34 to 10 individuals/ha. In the most invaded sites, the high proportion of small individuals suggests an important ongoing colonization process, emphasized by the fact that fruiting capacities were demonstrated for 3-year-old individuals. Invaded habitats were typically Mosan Xerobromion habitats, which are priority Natura 2000 habitats. The presence of C horizontalis was associated with changes in both the structure and composition of the community by decreasing species richness and diversity, and affecting grassland specialist species. These impacts are expected to intensify over time with population age and increasing propagule pressure due to close urbanization. [less ▲]

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See detailNaturally occurring BLV- LTR variants show differential binding with transcriptional regulator E2F-4
Rodriguez, Sabrina ULg; Varone, C.; Cánepa, E. et al

in AIDS Research and Human Retroviruses (2007, April 23), 23(4), 657

Naturally occurring BLV- LTR variants show differential binding with transcriptional regulator E2F-4. Sabrina M. Rodríguez1, Cecilia Varone2, Eduardo Cánepa2, Karina Trono1. srodriguez@cnia.inta.gov.ar ... [more ▼]

Naturally occurring BLV- LTR variants show differential binding with transcriptional regulator E2F-4. Sabrina M. Rodríguez1, Cecilia Varone2, Eduardo Cánepa2, Karina Trono1. srodriguez@cnia.inta.gov.ar 1Instituto de Virología. CICVyA. INTA-Castelar. Castelar. Buenos Aires. Argentina 2Catedra de Biología Molecular. Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires. Buenos Aires. Argentina The proviral Long Terminal Repeats (LTR) of retroviruses constitute a critical element involved in the regulation of viral and cellular gene expression. It is well known for some viruses within the Retroviridae family that minimal changes in this region can influence tropism, virulence and pathogenicity. The aim of this work was to elucidate if there is any association between the binding capacity of the Bovine Leukemia Virus (BLV) LTR region with cellular transcription factors and the pathogenic evolution of natural infection. The complete 5´LTR sequence amplified from mononuclear cells and tumour tissues of 40 naturally infected cattle was analyzed. Sequence analysis revealed the presence of two LTR variants associated with the different BLV pathogenic phenotypes: aleukemic (AL), persistent lymphocitosis (PL) and lymphosarcoma (LS). Analysis by EMSA showed a clearly weaker specific binding pattern when a LS-derived sequence was used as probe. Together with this finding, we also demonstrated by gel shift and supershift assays that the cellular transcription factor E2F-4 specifically interacts with a putative E2F binding motif within the U5 region of BLV 5`LTR unveiled by “in sillico” analysis. The results of this work demonstrates for the first time the presence of differential binding capacity of BLV natural derived variants to cellular nuclear proteins, together with physical characterization of an E2F-4 binding site in the U5 region of BLV-LTR that shows preferential binding to AL/PL derived sequences. These findings can contribute to the knowledge of LTR-driven regulation of viral and cellular gene expression. [less ▲]

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See detailNature and distribution of pulmonary vascular resistance during endotoxin insult in intact dogs
D'Orio, Vincenzo ULg; FATEMI, M; MARNETTE, JM et al

in American Review of Respiratory Disease (1992), 4

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See detailThe nature and evolution of working memory deficits in multiple sclerosis
DELRUE, Gaël ULg; Caps, Emilie; Gryglewicz, Céline et al

Poster (2007, October 12)

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See detailNature and function of verbal short-term memory for serial order.
Majerus, Steve ULg

Scientific conference (2013, April 17)

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See detailThe nature and origin of campylidia in lichenized fungi
Sérusiaux, Emmanuël ULg

in Lichenologist (1986), 18

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See detailLa nature de l'acte juridique attesté par l'O. Mich. III 1098
Straus, Jean ULg

in Chronique d'Egypte : Bulletin Périodique de la Fondation Egyptologique Reine Elisabeth (1997), LXXII(143), 128-129

O. Mich. III 1098 attests the delivery of a slave as a surety of a loan.

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See detail"Nature des fonctions en grammaire"; "Fonctions des natures en grammaire"
Defays, Jean-Marc ULg

Scientific conference (2011, February 22)

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See detailNature des traitements morphologiques chez les dyslexiques : une étude en amorçage masqué
Quemart, Pauline ULg; Casalis, Séverine

Conference (2010, September)

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See detailNature du phosphore dans deux échantillons de gypse Imacid
Bastin, David ULg

Report (2000)

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See detailNature et qualités de spatiocartes
Donnay, Jean-Paul ULg

in Bulletin de la Société Géographique de Liège (2000), 38

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See detailNature et sanction(s) de l'article 701 du Code judiciaire
Boularbah, Hakim ULg

in Journal des Tribunaux (2009)

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See detailNature et structure des relations syntaxiques dans le modèle de Lucien Tesnière
Mazziotta, Nicolas ULg

in Modèles Linguistiques (2014), 69

Résumé. — Dans ses Éléments de syntaxe structurale, Lucien Tesnière décrit les relations de différentes sortes entre les mots. On a retenu essentiellement la connexion (relation de dépendance), la ... [more ▼]

Résumé. — Dans ses Éléments de syntaxe structurale, Lucien Tesnière décrit les relations de différentes sortes entre les mots. On a retenu essentiellement la connexion (relation de dépendance), la jonction (relation d'équivalence) et la translation (relation permettant de changement de partie du discours), mais il faut également considérer le nucléus, qui constitue la relation fondamentale de la syntaxe tesniérienne et donne au mot son potentiel syntaxique. En formalisant le modèle à l'aide d'un objet mathématique simple que nous nommons polygraphe, il est possible de décrire ces relations différentes en employant un nombre limité de paramètres communs. On comprend ainsi mieux ce qui les rapproche et ce qui les distingue. Cette formalisation rend également compte du fait que le modèle de Tesnière décrit des relations qui s'établissent entre d'autres relations et non uniquement des liens entre des mots. [less ▲]

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See detailNature et tendances de la cartographie assistée par ordinateur
Donnay, Jean-Paul ULg

in Nouvelles tendances de la géographie en Belgique (1994)

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