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Peer Reviewed
See detailLe leadership dans la recherche partenariale dans la perspective du développement durable.
bryant, Christopher; Bousbaine, Antonia ULiege

Conference (2015, May)

Climate change resilience (CC) calls for actions to build and improve resilience that needs to be integrated into a holistic thinking and strategic planning process to give these actions the importance ... [more ▼]

Climate change resilience (CC) calls for actions to build and improve resilience that needs to be integrated into a holistic thinking and strategic planning process to give these actions the importance they deserve. In this context, we have the right to ask ourselves: who can take initiatives to launch these processes? Who is in a position to take the lead in launching more targeted actions? Leadership is not confined to people who are at the top of a hierarchy, ex. the mayor, the elected representatives, ... Such processes have been initiated in many jurisdictions across Canada by actors not associated with local or regional governments. In the context of sustainable development, leadership requires "leaders" to recognize the need to empower other actors, including citizens, to assume the leadership of other actions and processes within a particular strategic orientation – reinforce resilience to CC. This reasoning is based on the principles of sustainable development which requires recognition of the contribution of each actor / group of actors and an understanding of the interests of each person involved. It is important to empower as many people as possible and not to focus on elected officials and professional staff – hence the construction of decentralized leadership and, ultimately, new governance. [less ▲]

Detailed reference viewed: 37 (0 ULiège)
See detailLeadership et genre
Cornet, Annie ULiege; Bonnivert, S.

in Cornet, Annie; Laufer, Jacqueline; Belghiti, Sophia (Eds.) Genre et GRH, Les défis de l'égalité hommes-femmes (2008)

Detailed reference viewed: 204 (16 ULiège)
See detailLeadership et genre : le piège des compétences sexuées
Cornet, Annie ULiege

Conference (2010)

Detailed reference viewed: 67 (7 ULiège)
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See detailLeadership et genre : regard croisé de la gestion et de la psychanalyse
Cornet, Annie ULiege; Cadalen, Sophie

in Gazette Cournot (La) (2010), 47

Detailed reference viewed: 85 (19 ULiège)
See detailLeadership et genre : regard croisé de la gestion et de la psychanalyse
Cornet, Annie ULiege; CADALEN, Sophie

in Sala, F.; Gueret-Talon, L. (Eds.) Etre homme ou femme dans les organisations: Contribution à l’éclosion de l’économie de la connaissance (2010)

analyse de la littérature sur le leadership féminin et/ou sexué

Detailed reference viewed: 46 (10 ULiège)
Peer Reviewed
See detailLeadership et genre : une réalité multiculturelle ?
Cornet, Annie ULiege; Bonnivert, S.

Conference (2008, November)

Detailed reference viewed: 117 (18 ULiège)
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See detailLeadership et genre : regard croisé de la gestion et de la psychanalyse
Cornet, Annie ULiege; Cadalen, Sophie

Scientific conference (2009, May)

La féminisation croissante des différents niveaux du management et l’augmentation du nombre de femmes occupant d e s p o s t e s à responsabilité ont s u s c i t é différentes recherches comparatives sur ... [more ▼]

La féminisation croissante des différents niveaux du management et l’augmentation du nombre de femmes occupant d e s p o s t e s à responsabilité ont s u s c i t é différentes recherches comparatives sur les styles de leadership mobilisés par les hommes et les femmes. Malgré les nombreuses études réalisées sur le sujet, on est très loin du consensus d’une part, sur l’existence ou non de différences dans le leadership féminin et masculin et d’autre part, sur les explications formulées pour avancer ces résultats. [less ▲]

Detailed reference viewed: 816 (19 ULiège)
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Peer Reviewed
See detailLeadership et genre : un regard croisé avec la psychanalyse
Cornet, Annie ULiege; Cadalen, Sophie

Article for general public (2009)

La féminisation croissante des différents niveaux du management et l’augmentation du nombre de femmes occupant d e s p o s t e s à responsabilité ont s u s c i t é différentes recherches comparatives sur ... [more ▼]

La féminisation croissante des différents niveaux du management et l’augmentation du nombre de femmes occupant d e s p o s t e s à responsabilité ont s u s c i t é différentes recherches comparatives sur les styles de leadership mobilisés par les hommes et les femmes. Malgré les nombreuses études réalisées sur le sujet, on est très loin du consensus d’une part, sur l’existence ou non de différences dans le leadership féminin et masculin et d’autre part, sur les explications formulées pour avancer ces résultats. [less ▲]

Detailed reference viewed: 188 (6 ULiège)
See detailLeadership et modèles de gestion des ressources humaines
Pichault, François ULiege

in Cobbut, Eric (Ed.) Vers un leadership de qualité. Rêve ou réalité ? (2007)

Studies the contextual conditions under which a quality-based leadership may be efficient

Detailed reference viewed: 392 (22 ULiège)
See detailLeadership et pouvoir dans les communautés d’origine immigrée
Martiniello, Marco ULiege

Scientific conference (1993, February 08)

Detailed reference viewed: 78 (3 ULiège)
See detailLe leadership ethnique en Belgique
Martiniello, Marco ULiege

Scientific conference (1992, April 22)

Detailed reference viewed: 12 (0 ULiège)
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Peer Reviewed
See detailLeaf area and leaf orientation measurement by using stereo-vision
Leemans, Vincent ULiege; Dumont, Benjamin ULiege; Destain, Marie-France ULiege

Conference (2013, September 03)

This paper presents a 3D stereo-vision system aiming at the measurement of plant characteristics. The method is intended to be used in an Ecotron where the availability of plant material is limited and ... [more ▼]

This paper presents a 3D stereo-vision system aiming at the measurement of plant characteristics. The method is intended to be used in an Ecotron where the availability of plant material is limited and where crop should be characterised non destructively. The plants were not considered as individuals, it was the crop as a whole that was characterised. The leaf area index (LAI) was measured. It is an important property of vegetation, since it determines the photosynthetic primary production, the plant evaporation and characterises the plant growth. The average leaf angle (ALA) was also measured. For the computation, leaf pixels were differentiated from soil pixels by using linear discriminant analysis. The stereo vision system computed the distance to the camera of each pixel in the image in the region where the pixels are present in both images. The observed area was computed on the basis of the average distance of the leaf pixels in the region. The leaf area was evaluated for each triplet of adjacent pixels by computing the cross product of the vectors defined by those three points. The sum gave the leaf area for the same region. The area of these triangles was summed for all the pixels in the region and the ratio to the observed area gave the LAI. The ALA was the mean orientation of the pixel triplets. After calibration, the method was found to present a coefficient of correlation of 0.93 with destructive reference measurements and a precision of 0.12 for the LAI. It was possible to measure the LAI and the ALA from the germination up to the ripening stage with a minimum of work load. [less ▲]

Detailed reference viewed: 60 (10 ULiège)
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Peer Reviewed
See detailLeaf carbohydrate controls over Arabidopsis growth and response to elevated CO2: an experimentally based model
Rasse, Daniel; Tocquin, Pierre ULiege

in New Phytologist (2006), 172(3), 500-513

Transient starch production is thought to strongly control plant growth and response to elevated CO2. We tested this hypothesis with an experimentally based mechanistic model in Arabidopsis thaliana ... [more ▼]

Transient starch production is thought to strongly control plant growth and response to elevated CO2. We tested this hypothesis with an experimentally based mechanistic model in Arabidopsis thaliana. Experiments were conducted on wild-type (WT) A. thaliana, starch-excess (sex1) and starchless (pgm) mutants under ambient and elevated CO2 conditions to determine parameters and validate the model. The model correctly predicted that mutant growth is approx. 20% of that in WT, and the absolute response of both mutants to elevated CO2 is an order of magnitude lower than in WT. For sex1, direct starch unavailability explained the growth responses. For pgm, we demonstrated experimentally that maintenance respiration is proportional to leaf soluble sugar concentration, which gave the necessary feedback mechanism on modelled growth. Our study suggests that the effects of sugar-starch cycling on growth can be explained by simple allocation processes, and the maximum rate of leaf growth (sink capacity) exerts a strong control over the response to elevated CO2 of herbaceous plants such as A. thaliana. [less ▲]

Detailed reference viewed: 51 (6 ULiège)
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Peer Reviewed
See detailLeaf carbohydrate status in Lolium temulentum during the induction of flowering
Périlleux, Claire ULiege; Bernier, Georges ULiege

in New Phytologist (1997), 135(1), 59-66

Unifoliated plants of Lolium temulentum L. ev. Ceres, a qualitative long-day grass, were induced to flower by one 24-h long day (LD) or by one 8-h short day (SD) advanced by 1 2 h in the normal regime, so ... [more ▼]

Unifoliated plants of Lolium temulentum L. ev. Ceres, a qualitative long-day grass, were induced to flower by one 24-h long day (LD) or by one 8-h short day (SD) advanced by 1 2 h in the normal regime, so-called 'displaced short day' (DSD). Standard light for SD and DSD was a mixture of fluorescence and incandescence at 400 µmol m2 s-1 whereas the extension period of the 24-h LD was solely incandescence at 10-15 µmol m2 s-1. The DSD system was first characterized by the timings of floral induction, stimulus translocation and apical development. Carbohydrates in the blade tissues and in leaf exudate were analysed comparatively in vegetative and induced plants. Fructans were not detected in the leaf tissues whereas sucrose and starch were found to be present in similar amounts. In SD, their contents exhibited a diurnal fluctuation and were not in large excess. The common change observed during the two inductive treatments was that starch remained at a high level during the LD extension, even though the lighting was unsuitable for photosynthesis, and increased transiently in DSD. Sucrose was the major sugar contained in the leaf exudate. Its content increased when flowering was induced, but not at the same time in the two systems. In LD, sucrose exudation rose when plants were returned to standard light after the inductive cycle, i.e. after the LD stimulus had left the leaf blade. By contrast, during the DSD, sucrose was transported at the same time as the floral stimulus. Results are discussed together with the methods used to time stimulus translocation and their implications. [less ▲]

Detailed reference viewed: 61 (4 ULiège)
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Peer Reviewed
See detailThe leaf extract of Ribes nigrum L. is a potent stimulator of the endothelial formation of NO in cultured endothelial cells and porcine coronary artery rings
Tabart, Jessica; Schini-Kerth, Valérie; PINCEMAIL, Joël ULiege et al

in Journal of Berry Research (2016), 6

BACKGROUND: Endothelial dysfunction is a major hallmark of most types of cardiovascular diseases. Numerous plant extracts have been shown to cause endothelium-dependent relaxations by increasing the ... [more ▼]

BACKGROUND: Endothelial dysfunction is a major hallmark of most types of cardiovascular diseases. Numerous plant extracts have been shown to cause endothelium-dependent relaxations by increasing the endothelial formation of the potent vasoprotective factor, nitric oxide (NO). OBJECTIVE: The ability of different Ribes nigrum L. extracts (Grossulariaceae) to induce endothelium-dependent relaxation by stimulating the endothelial formation of NO was assesssed. METHODS: Ribes nigrum extracts were prepared from buds, berries and leaves by extraction (Acetone:H2O:Acetic Acid; 70/28/2 (v/v/v)) and lyophilized after acetone evaporation. The ability of the extracts to stimulate the endothelial formation of NO was assessed using cultured endothelial cells and isolated porcine coronary artery rings. RESULTS: The Ribes nigrum leaf extract increased to a greater extent than the bud and the berry extracts the formation of NO, and up-regulated eNOS mRNA expression in cultured endothelial cells (the stimulatory effects amounted to 197 ± 9 %, 134 ± 6 % and 118 ± 5 %, respectively). The leaf extract induced greater relaxations of isolated coronary arteries with endothelium than the bud and the berry extracts whereas no such effects were observed in rings without endothelium. Relaxations to the leaf extract were minimally affected by indomethacin and by inhibitors of endothelium-dependent hyperpolarization response, and markedly reduced by NG-nitro-L-arginine. CONCLUSIONS: The present findings indicate that the Ribes nigrum leaf extract is a more potent inducer of the endothelial formation of NO than the bud and the berry extracts. [less ▲]

Detailed reference viewed: 58 (21 ULiège)
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See detailLeaf fall impact on diversity and trophic ecology of vagile macrofauna associated with exported P.oceanica litter
Remy, François ULiege; Mascart, Thibaud ULiege; Dauby, Patrick ULiege et al

Poster (2012, August 20)

In the Mediterranean Sea, Posidonia oceanica meadows produce a huge amount of detritus, evaluated up to 300 to 2000 g dry wt m-2 yr-1. This litter is mainly composed of dead leaves but also of uprooted P ... [more ▼]

In the Mediterranean Sea, Posidonia oceanica meadows produce a huge amount of detritus, evaluated up to 300 to 2000 g dry wt m-2 yr-1. This litter is mainly composed of dead leaves but also of uprooted P.oceanica shoots and drift macro-algae from adjacent rocky bottoms. Although rich in refractory materials (lignin) and poor in P and N, these underwater accumulations of leaves are colonised by fungi, micro-algae (like diatoms), bacteria, but also by micro and macrofauna assemblages. These organisms could play an important role in leaf litter degradation and enrichment, but also in energy and carbon transfer from P.oceanica to higher trophic levels in adjacent coastal ecosystems. In this study we focus on the vagile macro-fauna (invertebrates with a size > 500µm) inhabiting the exported litter accumulations of the Calvi Bay (France). We took standardised samples at two different sites (a sheltered one and an exposed one) before and after leaf fall. We emphasised that crustaceans represent 65 – 85% of the biodiversity, followed by annelids and molluscs, representing respectively 10-20% and 10-15% of the diversity. That general pattern differs between sampling sites and we highlighted changes after leaf fall at both sites. In order to assess the impact of the autumn period litter input on the trophic structure of these invertebrates, we conducted gut contents observations and “bulk” stable isotope analysis. The isotopic compositions of C and N stable isotopes of the potential detritic food sources and of the most abundant invertebrate’s species were measured using EA-IRMS. We finally focused on the two most abundant Gammaridean Amphipoda species representing up to about 60% of the vagile macrofauna found in litter accumulations: Gammarella fucicola and Gammarus aequicauda. The results of their isotopic measurements were used in the “SIAR” Bayesian mixing model to calculate the potential contribution of their potential food sources. [less ▲]

Detailed reference viewed: 76 (15 ULiège)
Peer Reviewed
See detailLeaf morphology evolution in euphyllophytes of South China through the Late Palaeozoic inferred from numerical analyses
Huang, P.; Xue, J.; Benton, M. J. et al

in Cascales - Miñana, Borja; Villanueva-Amadoz, Uxue; Diez, José B. (Eds.) Proceedings of the II Agora Paleobotanica Meeting (Abstract book) (2013, July)

Detailed reference viewed: 24 (0 ULiège)
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See detailLEAFY expression and temporal sequence of floral transition in Sinapis alba L.
Bonhomme, Delphine ULiege; Périlleux, Claire ULiege

Poster (2005)

The shoot apical meristem (SAM) of Sinapis alba can be switched from vegetative to reproductive fate by exposure of 2-month old plants to a single long day (LD). Floral transition then occurs in good ... [more ▼]

The shoot apical meristem (SAM) of Sinapis alba can be switched from vegetative to reproductive fate by exposure of 2-month old plants to a single long day (LD). Floral transition then occurs in good synchrony within a population, and a number of biochemical, cellular, and morphological changes have been described. Our aim is to integrate gene expression patterns into this timing. We report here the analysis of SaLFY, orthologous to the floral meristem identity gene LEAFY of Arabidopsis. Materials and Methods: Plants of Sinapis were grown in 8-h shorts days for two months before being induced to flower by one 22-h LD. Shoot apices were harvested 24, 32, 40, 48, 56 and 80h after start of the LD, and prepared for in situ hybridization (Melzer et al., 1999). Results and Conclusions: As expected, the expression of SaLFY was very strong in flower primordia. More surprisingly, SaLFY was expressed well before the initiation of flowers. First, a strong signal was detected in the tip of young leaf primordia of vegetative plants. Secondly, SaLFY was transiently expressed in the SAM of induced plants, from 32h after the start of the LD, when cell proliferation increased. The signal formed, in transverse sections, a discontinuous ring with activation where last leaves were to be initiated. Interestingly, this activation in the SAM matched in time and space early growth changes previously described during the transition to flowering, namely an increase of leaf primordia growth and an acceleration of last leaf initiation (Bernier, 1997), suggesting that SaLFY may have dual functions in fate specification during the floral transition of the SAM. References: Bernier G 1997. J Exp Bot 48; 1071-1077. Melzer S, Kampmann G, Chandler J, Apel K 1999. Plant J 18; 395-405. [less ▲]

Detailed reference viewed: 55 (4 ULiège)