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 Cultiver proteger autrement mariane_inrae_ppr_cpa_80

Growing and Protecting crops Differently

[THESIS] SUCSEED - Transmission of seed microbiota and impacts on seedling phenotype

Applications open until April 18

Topic: Transmission of seed microbiota and impacts on seeling phenotype 



Despite the crucial role of seeds for food production and maintenance of plant biodiversity, studies on seed microbiota are still scarce. As a consequence, many knowledge gaps remain regarding the role of seed microbiota during the early life stage of plants, especially during germination and emergence. Seeds can harbor a diversified microbiome but the causal relationships between the composition of seed microbiota and seedling phenotypes have not been established. Developing a better understanding of the dynamics and influence of this microbiota during crop establishment is particularly timely as the seed industry is preparing for a major revolution in seed treatments associated with the reduction of pesticide usage. In this context, this PhD project proposes to use synthetic ecology approaches to study the dynamics of a microbiota of known composition (synthetic community) and its impact on the host phenotype in a controlled manner. In particular, the first part of this project will focus on the study of the transmission of the microbiota from seeds to seedlings, in order to determine which fraction really constitutes the "primary inoculum" of the plant. In a second part, the effect of this microbiota on various plant traits will be evaluated via high-throughput phenotyping by digital imaging, and characterization of the seedling metabolome. The last part of this work will consist in identifying the strains / consortia and microbial functions involved in the modification of the phenotype of the seedling via targeted reconstructions of synthetic communities and comparative genomics.



Lab: Institut de Recherche en Horticulture et Semences (IRHS) - Seed EmerSys, Angers

Supervisors: Marie Simonin (, Matthieu Barret (

Graduate school: EGAAL

Starting date: October 2021 (Deadline: April 18)


To apply online, please click here or send CVs and cover letters to and