Cécile Thion

Cécile Thion
Cellenion, SASU

Ph.D
Microbiology Manager at Cellenion

About

40
Publications
7,136
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
1,307
Citations
Additional affiliations
January 2016 - present
Ecole Centrale de Lyon
Position
  • Research Associate
Description
  • Investigate niche differentiation between ammonia-oxidisers and their interactions with plants and soil heterotrophs. Study bacterial succession in glacier forefield chronosequences, with The University of Manchester and the University of Aberdeen.
July 2014 - December 2015
University of Aberdeen
Position
  • Research Associate
Description
  • Studied functional redundancy of nitrifier guild and the links between phylogenetic and functional diversity. Part of the NERC project 'Soil ammonia oxidisers: an embarrassment of richness?'
January 2013 - July 2014
University of Aberdeen
Position
  • Research Associate
Description
  • Studied the resistance and resilience to drought of nitrifier guild, as a function of plant cover. Part of the European Commission project ‘EcoFINDERS’.

Publications

Publications (40)
Article
Full-text available
The influence of plants on archaeal (AOA) and bacterial (AOB) ammonia oxidisers is poorly understood. Higher microbial activity in the rhizosphere, including organic nitrogen (N) mineralisation, may stimulate both groups, while ammonia uptake by plants may favour AOA, considered to prefer lower ammonia concentration. We therefore hypothesised (i) h...
Article
Full-text available
The emergence of high-throughput DNA sequencing methods provides unprecedented opportunities to further unravel bacterial biodiversity and its worldwide role from human health to ecosystem functioning. However, despite the abundance of sequencing studies, combining data from multiple individual studies to address macroecological questions of bacter...
Article
Full-text available
Soil microbial communities play a crucial role in ecosystem functioning, but it is unknown how co-occurrence networks within these communities respond to disturbances such as climate extremes. This represents an important knowledge gap because changes in microbial networks could have implications for their functioning and vulnerability to future di...
Article
Micro-organisms play key roles in various ecosystems, but many of their functions and interactions remain undefined. To investigate the ecological relevance of microbial communities, new molecular tools are being developed. Among them, single-cell omics assessing genetic diversity at the population and community levels and linking each individual c...
Article
Full-text available
Human activities have massively increased the amount of reactive nitrogen in the biosphere, which is leading to increased nitrogen (N) inputs in terrestrial ecosystems. The retention of N is a crucial ecosystem function of both managed and natural ecosystems, and there is a long history of experimental, observational, and conceptual studies identif...
Article
Full-text available
Nitrification inhibitors (NIs) applied to soil reduce nitrogen fertilizer losses from agro-ecosystems. NIs that are currently registered for use in agriculture appear to selectively inhibit ammonia-oxidizing bacteria (AOB), while their impact on other nitrifiers is limited or unknown. Ethoxyquin (EQ), a fruit preservative shown to inhibit ammonia-o...
Article
Full-text available
Investigation of niche specialisation in microbial communities is important in assessing consequences of environmental change for ecosystem processes. Ammonia oxidising bacteria (AOB) and archaea (AOA) present a convenient model for studying niche specialisation. They coexist in most soils and effects of soil characteristics on their relative abund...
Preprint
Full-text available
Nitrification inhibitors (NIs) reduce nitrogen fertilizer losses from agricultural ecosystems. Currently available NIs appear to selectively inhibit ammonia-oxidizing bacteria (AOB), while their impact on other groups of nitrifiers is limited. Ethoxyquin (EQ), a preservative shown to inhibit ammonia-oxidizers (AO) in soil, is rapidly transformed to...
Article
Microbial oxidation of ammonia controls the rates of nitrification in the majority of soils. Both nitrification rate and the composition of communities of ammonia oxidising archaea (AOA) and ammonia oxidising bacteria (AOB) are influenced by drought, with evidence that AOA are more sensitive to periods of drought than AOB. This has been explained b...
Article
Full-text available
Low nitrification rates in Brazilian savanna (Cerrado) soils have puzzled researchers for decades. Potential mechanisms include biological inhibitors, low pH, low microbial abundance and low soil moisture content, which hinders microbial activity, including ammonia oxidation. Two approaches were used to evaluate these potential mechanisms, (i) mani...
Poster
For over 100 years, aerobic nitrification was thought to be a separated two-step process, with ammonia oxidised to nitrite by ammonia oxidisers (AO), which was subsequently oxidised to nitrate by nitrite oxidising bacteria (NOB), including members of the Nitrospira and Nitrobacter genera in soil. This dogma was recently challenged by the discovery...
Poster
Full-text available
The forces driving spatio-temporal changes in bacterial communities remain unclear. In a context of global warming, global understanding of temporal shifts in bacterial communities is required. In this study, we predicted changes in bacterial communities in three geographically distinct glacier forelands, model chronosequences, representing primary...
Article
Full-text available
Studies of the distribution of ammonia oxidising archaea (AOA) and bacteria (AOB) suggest distinct ecological niches characterised by ammonia concentration and pH, arising through differences in substrate affinity and ammonia tolerance. AOA form five distinct phylogenetic clades, one of which, the ‘Nitrososphaera sister cluster’, has no cultivated...
Article
Full-text available
Knowledge on the factors that determine the composition of bacterial communities in the vicinity of roots (rhizosphere) is essential to understand plant-soil interactions. Plant species identity, plant growth stage and soil properties have been indicated as major determinants of rhizosphere bacterial community composition. Here we show that the pre...
Article
Full-text available
Climate change is expected to increase the frequency of severe drought events followed by heavy rainfall, which will influence growth and activity of soil microorganisms, through osmotic stress and changes in nutrient concentration. There is evidence of rapid recovery of processes and adaptation of communities in soils regularly experiencing drying...
Article
Full-text available
Very little is known about the influence of bacterial-fungal ecological interactions on polycyclic aromatic hydrocarbon (PAH) dissipation in soils. Fusarium solani MM1 and Arthrobacter oxydans MsHM11 can dissipate PAHs in vitro. We investigated their interactions and their effect on the dissipation of three PAHs-phenanthrene (PHE), pyrene (PYR) and...
Article
The fungal communities of a multi-contaminated soil polluted by polycyclic aromatic hydrocarbons and heavy metals (NM) were studied within a long-term in situ experiment of natural attenuation assisted by plants. Three treatments were monitored: bare soil (NM-BS), soil planted with alfalfa and inoculated with mycorrhizal fungi (NM-Msm), and soil wi...
Thesis
La dissipation des Hydrocarbures Aromatiques Polycycliques (HAP), polluants persistants majoritaires des sols de friches industrielles, implique l'action de microorganismes bactériens et fongiques. Cependant, leur contribution relative à la dissipation in situ, en fonction des interactions entre ces microorganismes ou avec les plantes et les pollua...
Article
The polycyclic aromatic hydrocarbon (PAH) dissipation potential of Fusarium solani MM1 and Arthrobacter oxydans MsHM11, isolated from a PAH-polluted soil, was investigated in liquid cultures containing 500, 500, and 50 mg l−1 of phenanthrene (PHE), pyrene (PYR), and dibenz(a,h)anthracene (DBA), respectively. The contributions of adsorption, absorpt...
Article
The polycyclic aromatic hydrocarbon (PAH) dissipation potential of Fusarium solani MM1 and Arthrobacter oxydans MsHM11, isolated from a PAH-polluted soil, was investigated in liquid cultures containing 500, 500, and 50 mg l−1 of phenanthrene (PHE), pyrene (PYR), and dibenz(a,h)anthracene (DBA), respectively. The contributions of adsorption, absorpt...
Article
Full-text available
The glutathione-S-transferase (GST) proteins represent an extended family involved in detoxification processes. They are divided into various classes with high diversity in various organisms. The Ure2p class is especially expanded in saprophytic fungi compared to other fungi. This class is subdivided into two subclasses named Ure2pA and Ure2pB, whi...
Article
A large number of soil bioindicators were used to assess biological diversity and activity in soil polluted with polycyclic aromatic hydrocarbons (PAHs) and the same soil after thermal desorption (TD) treatment. Abundance and biodiversity of bacteria, fungi, protozoa, nematodes and microarthropods, as well as functional parameters such as enzymatic...
Article
Full-text available
Due to human activities, large volumes of soils are contaminated with organic pollutants such as polycyclic aromatic hydrocarbons, and very often by metallic pollutants as well. Multipolluted soils are therefore a key concern for remediation. This work presents a long-term evaluation of the fate and environmental impact of the organic and metallic...
Article
Phenotypic and genomic dynamics enable bacteria to adapt quickly to various ecological niches and environmental fluctuations such as the presence of xenobiotic compounds. We explored the different adaptive mechanisms in the bacterium Sphingobium francense, which is able to degrade lindane, a chlorinated xenobiotic compound historically used in agri...

Questions

Question (1)
Question
Hey all,
We're looking for a thermocycler where we could program temp changes during run (e.g. block temp + 3°C), does anyone know such a machine ? Also, it'd be great if the temps can go quite low (i.e. <40°C).
Thanks in advance,
Cécile

Network

Cited By

Projects

Projects (3)
Project
The overall objective of this work, part of several national and international projects, is to elucidate the effects of interactions between plants, bacteria and fungi on ecosystem processes, including biogeochemical cycles (mainly N and C) and organic pollutant dissipation in soils and rhizosphere.
Project
The overall objective of this project is to understand how prokaryote communities develop in proglacial terrains following deglaciation and, more importantly, how microbial succession impacts C and N cycles in these soils and waters of the catchment areas.
Project
Nitrogen cycle scene has just been shaken up by the entrance of ‘comammox’, Nitrospira bacteria able to perform complete nitrification (Daims et al. 2015, Nature 528). This was previously thought to involve the oxidation of ammonia into nitrite by ammonia oxidisers (AO), further oxidised into nitrate by nitrite oxidising bacteria (NOB), which also include members of the Nitrospira genus. A decade before, AO were supposed to be bacteria (AOB) only, when archaeal AO (AOA) were found; significant contribution of AOA, initially considered as accessory, to nitrification was since then repetitively shown. Now, exploring the ecology of comammox and their interaction with ammonia oxidisers in soils, where nitrification affects fertilisation yield, nitrate leaching and nitrous oxide emissions, is crucial for agricultural and environmental fields.