Search results for "interactions"
showing 10 items of 1963 documents
Réponses des cellules de Nicotiana tabacum à des molécules microbiennes : évènements de signalisation précoce, influence de la dynamique membranaire …
2018
Responses of Nicotiana tabacum cells to microbial molecule treatments: early signaling events,influence of membrane dynamics, and sugar fluxesIn their natural environment plants are in close interaction with beneficial, neutral, or pathogenicmicrobes, which are highly dependent on carbon resources exuded by plant roots. Sugar transport, which isa key process of plant physiology, is essential to support the fate of plant-microbe interactions. Duringevolution, plants have acquired the ability to perceive microbial molecules, initiating specific signaltransduction cascades and leading to adapted response for microbe lifestyles (avirulent, virulent, or benefic).Plant survival will depend on the…
The Largest Subunit of RNA Polymerase II as a New Marker Gene to Study Assemblages of Arbuscular Mycorrhizal Fungi in the Field
2014
Due to the potential of arbuscular mycorrhizal fungi (AMF, Glomeromycota) to improve plant growth and soil quality, the influence of agricultural practice on their diversity continues to be an important research question. Up to now studies of community diversity in AMF have exclusively been based on nuclear ribosomal gene regions, which in AMF show high intra-organism polymorphism, seriously complicating interpretation of these data. We designed specific PCR primers for 454 sequencing of a region of the largest subunit of RNA polymerase II gene, and established a new reference dataset comprising all major AMF lineages. This gene is known to be monomorphic within fungal isolates but shows an…
Candida albicans-epithelial interactions: dissecting the roles of active penetration, induced endocytosis and host factors on the infection process
2012
International audience; Candida albicans frequently causes superficial infections by invading and damaging epithelial cells, but may also cause systemic infections by penetrating through epithelial barriers. C. albicans is a remarkable pathogen because it can invade epithelial cells via two distinct mechanisms: induced endocytosis, analogous to facultative intracellular enteropathogenic bacteria, and active penetration, similar to plant pathogenic fungi. Here we investigated the contributions of the two invasion routes of C. albicans to epithelial invasion. Using selective cellular inhibition approaches and differential fluorescence microscopy, we demonstrate that induced endocytosis contri…
Rbt1 Protein Domains Analysis in Candida albicans Brings Insights into Hyphal Surface Modifications and Rbt1 Potential Role during Adhesion and Biofi…
2013
Cell wall proteins are central to the virulence of Candida albicans. Hwp1, Hwp2 and Rbt1 form a family of hypha-associated cell surface proteins. Hwp1 and Hwp2 have been involved in adhesion and other virulence traits but Rbt1 is still poorly characterized. To assess the role of Rbt1 in the interaction of C. albicans with biotic and abiotic surfaces independently of its morphological state, heterologous expression and promoter swap strategies were applied. The N-terminal domain with features typical of the Flo11 superfamily was found to be essential for adhesiveness to polystyrene through an increase in cell surface hydrophobicity. A 42 amino acid-long domain localized in the central part o…
Landscape Systems and Human Land-Use Interactions in Mediterranean Highlands and Littoral Plains during the Late Holocene: Integrated Analysis from t…
2012
The main goal of the InterAmbAr reseach project is to analyze the relationships between landscape systems and human land-use strategies on mountains and littoral plains from a long-term perspective. The study adopts a high resolution analysis of small-scale study areas located in the Mediterranean region of north-eastern Catalonia. The study areas are distributed along an altitudinal transect from the high mountain (above 2000m a.s.l.) to the littoral plain of Empordà (Fig. 1). High resolution interdisciplinary research has been carried out from 2010, based on the integration of palaeoenvironmental and archaeological data. The micro-scale approach is used to understand human-environmental r…
Approche des groupes culturels et de leurs interactions entre Rhin et Rhône à la transition Bronze-Fer
2014
Cultural groups and their interactions follow from complex dynamics, delicate to grasp due to many unknown factors. However, it is still possible to define an approach to this problem with the use of elements from pre-established models, taking in consideration the different types of information offered by archaeological remains. The present analysis is part of a doctorat defended in April 2013 about cultural groups and exchanges dynamics, in a study area going from the Saône-Rhône confluence to the Mosel‘s mouth, from the 10th to the 8th centuries BC. More particularly, this work used metalwork types and deposit context as cultural indicators. The controntation of the results from the fact…
Pratiques numériques, perception de la violence en ligne et victimation chez les étudiants
2015
La recherche en éducation sur la violence entre pairs au moyen des technologies d’information et de communication, ou cyberviolence, se développe depuis plus d’une décennie à l’étranger, et plus récemment en France. Le public étudiant demeure peu étudié malgré une continuité du risque apparente. Cet article s’attache à évaluer l’ampleur de la victimation en ligne chez des étudiants français en lien avec leur utilisation des technologies et leur propre opinion sur ces thématiques. Les résultats tendent à confirmer le risque chez les étudiants d’être concernés par la cyberviolence notamment au regard de leurs pratiques numériques. Par ailleurs, des écarts de représentation entre conceptualisa…
La mère, son bébé et la nourriture : approche exploratoire multidisciplinaire
2010
In the present study we videotaped 60 French speaking mothers and their healthy toddlers (from 1 to 2 years old) during different meal sessions. Using an exploratory and multi-disciplinary approach, including sociology/anthropology, developmental psychology and clinical psychology, our study illustrates the complexity of investigating feeding and eating interactions between mothers and toddlers. We illustrate how mothers’ representations of food and maternal own experiences around food influence their will to transmit feeding values and habits to their toddlers but also their feeding educative practices. Furthermore, we show how individual’s characteristics can influence the quality of feed…
« Quand t’es passionné t’as besoin de le partager ! » Ethnographie d'un rassemblement de voitures anciennes
2021
National audience
L'aide à un parent âgé, seul et dépendant : déterminants structurels et interactions
2016
With population ageing, the demand for home care of the disabled elderly is increasing and a large part of care is provided by informal caregivers. This paper focuses on the determinants of care provision by children to an old, single and disabled parent. We focus on two-child families and apply a semi-structural methodology, already implemented on European data (survey SHARE). It makes it possible to distinguish between two types of determinants: structural determinants (individual, parental and family characteristics) and interactions (effect of the care provision of one child on the care provision of the other). The estimation of this model on data of the French survey "Handicap Santé Mé…