Know more

Our use of cookies

Cookies are a set of data stored on a user’s device when the user browses a web site. The data is in a file containing an ID number, the name of the server which deposited it and, in some cases, an expiry date. We use cookies to record information about your visit, language of preference, and other parameters on the site in order to optimise your next visit and make the site even more useful to you.

To improve your experience, we use cookies to store certain browsing information and provide secure navigation, and to collect statistics with a view to improve the site’s features. For a complete list of the cookies we use, download “Ghostery”, a free plug-in for browsers which can detect, and, in some cases, block cookies.

Ghostery is available here for free:

You can also visit the CNIL web site for instructions on how to configure your browser to manage cookie storage on your device.

In the case of third-party advertising cookies, you can also visit the following site:, offered by digital advertising professionals within the European Digital Advertising Alliance (EDAA). From the site, you can deny or accept the cookies used by advertising professionals who are members.

It is also possible to block certain third-party cookies directly via publishers:

Cookie type

Means of blocking

Analytical and performance cookies

Google Analytics

Targeted advertising cookies


The following types of cookies may be used on our websites:

Mandatory cookies

Functional cookies

Social media and advertising cookies

These cookies are needed to ensure the proper functioning of the site and cannot be disabled. They help ensure a secure connection and the basic availability of our website.

These cookies allow us to analyse site use in order to measure and optimise performance. They allow us to store your sign-in information and display the different components of our website in a more coherent way.

These cookies are used by advertising agencies such as Google and by social media sites such as LinkedIn and Facebook. Among other things, they allow pages to be shared on social media, the posting of comments, and the publication (on our site or elsewhere) of ads that reflect your centres of interest.

Our EZPublish content management system (CMS) uses CAS and PHP session cookies and the New Relic cookie for monitoring purposes (IP, response times).

These cookies are deleted at the end of the browsing session (when you log off or close your browser window)

Our EZPublish content management system (CMS) uses the XiTi cookie to measure traffic. Our service provider is AT Internet. This company stores data (IPs, date and time of access, length of the visit and pages viewed) for six months.

Our EZPublish content management system (CMS) does not use this type of cookie.

For more information about the cookies we use, contact INRA’s Data Protection Officer by email at or by post at:

24, chemin de Borde Rouge –Auzeville – CS52627
31326 Castanet Tolosan CEDEX - France

Dernière mise à jour : Mai 2018

Menu Logo Principal UMR ISPA

Home page


BIOGET group

PhD student

INRA Centre de Bordeaux Aquitaine
71 avenue E. Bourlaux
CS 20032 33882 Villenave d'Ornon cedex
05 57 12 24 84


2013: Scientific Baccalaureate - Ouagadougou (Burkina Faso)

2016 : Licence Ecology and Environment - Sétif (Algeria)

2018: Master's degree in Environmental Management - Marseille (France).

Since October 2018 : PhD on "Temporal evolution of copper availability in soils under organic agriculture".

Research and/or skills

I did some research internships during my master's degree:

Study of root development using X-ray tomography,
Study of the impact of crops on silicon bioavailability (CEREGE - Aix-en-Provence).
During my course, I had in-depth courses on biogeochemical cycles, waste management and polluted soils. I have also been trained in various laboratory techniques for the characterization of soil particles: laser particle size, X-ray diffraction, spectrometry. I have also worked with software such as R and QGIS.

Project in progress


Copper has been used as a fungicide for more than 100 years in viticulture, arboriculture and market gardening. It is currently the only fungicide authorized in organic farming. Because of the accumulation of copper in the top soil horizon (Brun et al., 1998), high concentrations are noticed. Phytotoxicities have been observed in vineyard soils in conversion crop farming, particularly in Languedoc-Roussillon (Michaud et al., 2007, Bravin, 2008) and the problems of vineyard dieback may be linked to this contamination. The ecotoxicity of copper depends on its availability, ie its concentration in the soil solution in a free ionic form. Copper has a very strong affinity for organic matter. Thus the amount of soluble organic matter and its complexation properties control the concentration of free ion in solution and therefore the availability of copper in the soil. It was found that the organic matter reactivity toward copper varied depending on the soils (Djaé et al., 2007). The default parameterization of geochemical models was then impossible. However, the link between the reactivity of soluble organic matter, its characterization and the physicochemical properties of the soil is still poorly understood. The supply of fresh raw materials, which mineralize rapidly by inducing a 'priming effect', will lead to modify the chemical composition of the soil solution. In agricultural soils, copper availability would vary over time depending on climatic conditions, inputs of fresh raw materials (green manures, straw, effluents) and the initial level of soil contamination. This thesis aims to understand if the dynamics of organic matter in soils, in connection with the evolution of climatic conditions, control the availability and ecotoxicity of copper. This will allow us to identify the pedoclimatic conditions limiting or exacerbating the availability, in order to limit the soil-plant transfer to decrease phytotoxicity, or exacerbating it to promote phytoextraction. The thesis will therefore study, in greenhouse or open field conditions, the links between soluble organic matter and copper speciation and the consequences on plant uptake. We will test this hypothesis : • on soils with different copper contamination and physicochemical properties, • at different temperatures to modify the mineralization of the solid organic matter, • with intake of fresh organic matter, which stimulates microbial activity, mineralization and priming effect. This study will focus on vineyard or market gardening soils, in organic farming, in which the major contaminant is copper.

Supervised by:

  • Laurence DENAIX (UMR ISPA 1391)


 TP & TD supervision for Bordeaux Sciences Agro master's degrees.