Search results for "Microbiologie"

Les herbicides β-tricétones : devenir et impact écotoxicologique dans les sols agricoles et caractérisation de souches bactériennes dégradantes

2016

P-triketone herbicides : fate and ecotoxicological impact in arable soils and characterization of degrading bacterial strains abstract :This work aims to describe the ecodynamics of synthetic (sulcotrione and mesotrione) and natural (leptospermone) -triketone herbicides and to estimate their ecotoxicological impact on the bacterial community in arable soils. The processes involved in the dissipation of these herbicides (adsorption and biodegradation) have been studied in soil microcosms. Two bacterial strains, Bradyrhizobium sp. SRl able to degrade sulcotrione and mesotrione, and Methylophilus sp. LS1 degrading leptospermone, have been isolated. A bank of 12 ooo mutants of Bradyrhizobium sp…

Exploring the diversity of listeria monocytogenes biofilm architecture by high-throughput confocal laser scanning microscopy and the predominance of …

2015

ABSTRACT Listeria monocytogenes is involved in food-borne illness with a high mortality rate. The persistence of the pathogen along the food chain can be associated with its ability to form biofilms on inert surfaces. While most of the phenotypes associated with biofilms are related to their spatial organization, most published data comparing biofilm formation by L. monocytogenes isolates are based on the quantitative crystal violet assay, which does not give access to structural information. Using a high-throughput confocal-imaging approach, the aim of this work was to decipher the structural diversity of biofilms formed by 96 L. monocytogenes strains isolated from various environments. Pr…

Significant biogenesis of chlorinated aromatics by fungi in natural environments

1994

Common wood- and forest litter-degrading fungi produce chlorinated anisyl metabolites. These compounds, which are structurally related to xenobiotic chloroaromatics, occur at high concentrations of approximately 75 mg of chlorinated anisyl metabolites kg of wood-1 or litter-1 in the environment. The widespread ability among common fungi to produce large amounts of chlorinated aromatic compounds in the environment makes us conclude that these kinds of compounds can no longer be considered to originate mainly from anthropogenic sources.

Explorer la biodiversité pour trouver de nouvelles souches microbiennes pour les innovations de produits alimentaires

2015

Référence : 201511122729; Entre les innovations alimentaires renforçant les propriétés sensorielles ou de santé ou améliorant le procédé, la demande de souches microbiennes nouvelles est forte. Toutefois, trouver de nouvelles souches libres de droits et efficaces n’est pas une tâche facile. Dans cet article, seront présentées des voies d’innovations pour augmenter le bénéfice sensoriel de fermentations et les activités du laboratoire international «Tropical Bioresources & Biotechnology» pour découvrir de nouvelles souches et de nouveaux procédés basés sur les fermentations traditionnelles de produits tropicaux.

Population Structure and Comparative Genome Hybridization of European Flor Yeast Reveal a Unique Group of Saccharomyces cerevisiae Strains with Few G…

2014

Wine biological aging is a wine making process used to produce specific beverages in several countries in Europe, including Spain, Italy, France, and Hungary. This process involves the formation of a velum at the surface of the wine. Here, we present the first large scale comparison of all European flor strains involved in this process. We inferred the population structure of these European flor strains from their microsatellite genotype diversity and analyzed their ploidy. We show that almost all of these flor strains belong to the same cluster and are diploid, except for a few Spanish strains. Comparison of the array hybridization profile of six flor strains originating from these four co…

GenoSol : La mémoire des sols

2013

Article sur GenoSol, interview de S. Dequiedt EA GenoSol

Physiological and genetic characterization of an isoproturon mineralizing bacterial strain isolated from a French agricultural soil: Genomic approach…

2010

Atlas Français des bactéries du sol

2018

Battle Karimi est post-doctorante dans l’UMR Agroécologie à l’INRA de Dijon et s’intéresse à l’écologie des communautés microbiennes. Elle a intégré l’équipe de recherche Biocom en 2016 afin d’analyser l’ensemble des données environnementales et microbiologiques issues du RMQS (Réseau de Mesures de la Qualité des Sols) et de les valoriser sous la forme du présent ouvrage. Elle a participé à la rédaction et à la mise en forme de la majeure partie de l’atlas, et a coordonné son avancement au sein de l’équipe d’auteurs.Nicolas Chemidlin-Prévost Bouré est maître de conférences en biologie des sols à AgroSup Dijon et membre de l’UMR Agroécologie. Spécialisé en écologie des communautés microbienn…

Diagnostic et pilotage de la qualité des sols viticoles : une nouvelle génération d'indicateurs microbiologiques moléculaires

2018

prod 2018-253c EA BIOmE INRA; National audience

Intérêt de la qualité microbiologique (bactéries et champignons) des sols pour les productions viticoles

2018

Prod 2018-253d EA BIOmE INRA; National audience