Search results for "parasitology"
showing 10 items of 1410 documents
A soil microscale study to reveal the heterogeneity of Hg (II) impact on indigenous bacteria by quantification of adapted phenotypes and analysis of …
2000
International audience
Using CRISPR/Cas platform for Genetic Modification of Commercial Saccharomyces cerevisiae strains
2019
International audience; Traditional wine fermentation is a complex microbial process initiated by various yeast species classified as Saccharomyces and non-Saccharomyces species.To better understand the different interactions occurring within wine fermentations and track a specific yeast population, we wish to obtain GFP-tagged yeast cells that stably expres fluorescence signal without compromising the fermentative capability of the strain.To this end, the CRISPR/Cas system was investigated to genetically modify the commercial Saccharomyces Saccharomyces cerevisiae diploid strain Lalvin EC 1118
Black currant project: Multidisciplinary approach to agro-ecological measures
2022
The decline of wild pollinators leads to a drastic drop in the associated ecosystem service, resulting in significant lossesin agricultural yields. The production of blackcurrant “Noir de Bourgogne” could potentially be tripled, if populationsof wild pollinators were restored. Various agroecological measures beneficial to pollinators are discussed here, as wellas ongoing experimental tests. We discuss the practical possibilities of implementing these measures by blackcurrantgrowers as well as the technical locks that still exist. The return to an agroecological equlibrium for which pollinationbecomes again a free ecosystem service for agriculture, requires the integration of multiple agroec…
Ecology of N2O reducing bacteria in arable soils
2016
Nitrous oxide (N2O) is an important greenhouse gas (GHG) and the main ozone depleting substance. Agricultural soils are the main anthropogenic-induced source of this GHG. The concentration of N2O in the atmosphere is steadily increasing, but we still lack knowledge on the factors controlling its production and consumption in soils. The reduction of N2O to N2 by microorganisms harboring the N2O reductase gene (nosZ) is the only known biological process able to consume this GHG. Recent studies revealed a previously unknown clade of N2O-reducers which was shown to be important to the N2O sink capacity of soils. This thesis seeks to gain a greater understanding on the ecology of N2O-reducers in…
Biodiversité fongique du raisin au vin : impact de l'activité anthropique
2016
The effects of different anthropogenic activities (vineyard, winery) on fungal populations from grape to wine were studied. To characterize these effects, it was necessary to access to the overall diversity of populations (pyrosequencing and spectroscopy FT-IR) but also to intra-specific diversity (FT-IR). Spectroscopy FT-IR has been validated for their ability to characterize the global population and to discriminate the strains for three species of non-Saccharomyces yeasts (NS). For the first time, it is shown that the grape berry is a limited source for NS yeasts while the winery seems to be a significant source; the air is an important vector for dissemination of these yeasts. In additi…
Communication and Autoinduction in the species Listeria monocytogenes
2014
International audience; In order to withstand changes in their environment, bacteria have evolved mechanisms to sense the surrounding environment, integrate these signals and adapt their physiology to thrive under fluctuating conditions. Among these mechanisms, the ability of bacteria to exchange information between cells has become a dynamic field of interest for microbiologists over the past four decades. First described by Nelson et al.,1 this phenomenon often referred as either cell-cell communication, Quorum Sensing and/or AutoInduction involves the synthesis of small signal molecules called autoinducers. These signal molecules may be sensed by the bacterial population in the vicinity …
Responsable du parcours "Microbiote et Toxicologie"
2019
Organisations de colloques de portée nationale/ internationale
Are bacterial spores activated by High Pressure treatment at 20°C ?
2018
Understanding low hydration state of bacteria spores
2019
Are bacterial spores activated by High Pressure treatment at 20°C ?
2019
International audience