Université de Neuchâtel

Sporulation capability and metabolic mechanisms of endospore-forming Firmicutes under conditions limiting for growth and survival

Filippidou, Sevasti ; Junier, Pilar (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2016.

Life, as we know it, has physical and chemical limits. More precisely, physical and chemical environmental parameters set the thresholds for reproduction, metabolism and survival for the organisms known to date. Environmental conditions unsuitable for survival and development are the rule rather than the exception in most habitats. Microorganisms have developed various strategies to withstand...

Université de Neuchâtel

Highways and subways : a story of fungi and bacteria in soils

Simon, Anaële ; Junier, Pilar (Dir.) ; Verrecchia, Eric P. (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2016.

Traditionally, bacteriologists and mycologists have conducted study of their respective fields separately, despite of the fact that bacteria and fungi co-exist in almost every type of ecosystem. Amongst the numerous types of interactions possibly occurring between fungi and bacteria, this thesis focuses on fungal highways, a mechanism by which bacteria disperse along fungal hyphae. We...

Université de Neuchâtel

Assessing the role of native plant growth-promoting Rhizobacteria as bio-inoculants for Yerba Mate ("Ilex paraguariensis")

Bergottini, Veronica M ; Junier, Pilar (Dir.) ; Benrey, Betty (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2015.

The accelerated process of soil degradation due to long-term inadequate agricultural practices in Misiones, the major productive region of Yerba Mate (Ilex paraguariensis St. Hill.) in Argentina, has led to an urgent need for research and development of more sustainable agricultural practices. Yerba Mate is an emblematic crop in southern South America due to its leaves are used to prepare...

Université de Neuchâtel

Spore-forming bacteria as indicators of pollution in sediments of Lake Geneva

Bueche, Matthieu ; Junier, Pilar (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2014.

Two components: Endospore-forming Firmicutes are well known for their capacity to survive under harsh environmental conditions through the formation of strong and persistent structures called endospores. Sediments of the Bay of Vidy (Lake Geneva), that are well known for their heavy metal pollution. The question was: Are endospore-forming Firmicutes predominant members of the bacterial...

Université de Neuchâtel

Diversity of endospore-forming bacteria in sediment as a proxy for environmental lake history

Wunderlin, Tina ; Junier, Pilar (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2013.

Freshwater systems are of high ecological and economical importance but at the same time subjected to anthropogenic pressure such as input of pollutants, overfishing, changes in climate regime, and eutrophication (high nutrient input). For environmental management and the implementation of conservation measures, the dynamics of freshwater ecosystems need to be known and biological reference...

Université de Neuchâtel

Assessing the diversity and metabolism of oxalotrophic bacteria in tropical soils

Bravo, Daniel ; Junier, Pilar (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2013.

Climate change is increasing as a consequence of elevated concentrations of CO2 in the atmosphere. Among the scientific strategies proposed to tackle the effect of elevated CO2, the biogeochemical oxalate-carbonate pathway (OCP) occurring in terrestrial habitats, appears to be important since it is considered as a potential carbon sink. This process occurs naturally in...