Know more

About cookies

What is a "cookie"?

A "cookie" is a piece of information, usually small and identified by a name, which may be sent to your browser by a website you are visiting. Your web browser will store it for a period of time, and send it back to the web server each time you log on again.

Different types of cookies are placed on the sites:

  • Cookies strictly necessary for the proper functioning of the site
  • Cookies deposited by third party sites to improve the interactivity of the site, to collect statistics

Learn more about cookies and how they work

The different types of cookies used on this site

Cookies strictly necessary for the site to function

These cookies allow the main services of the site to function optimally. You can technically block them using your browser settings but your experience on the site may be degraded.

Furthermore, you have the possibility of opposing the use of audience measurement tracers strictly necessary for the functioning and current administration of the website in the cookie management window accessible via the link located in the footer of the site.

Technical cookies

Name of the cookie


Shelf life

CAS and PHP session cookies

Login credentials, session security



Saving your cookie consent choices

12 months

Audience measurement cookies (AT Internet)

Name of the cookie


Shelf life


Trace the visitor's route in order to establish visit statistics.

13 months


Store the anonymous ID of the visitor who starts the first time he visits the site

13 months


Identify the numbers (unique identifiers of a site) seen by the visitor and store the visitor's identifiers.

13 months

About the AT Internet audience measurement tool :

AT Internet's audience measurement tool Analytics is deployed on this site in order to obtain information on visitors' navigation and to improve its use.

The French data protection authority (CNIL) has granted an exemption to AT Internet's Web Analytics cookie. This tool is thus exempt from the collection of the Internet user's consent with regard to the deposit of analytics cookies. However, you can refuse the deposit of these cookies via the cookie management panel.

Good to know:

  • The data collected are not cross-checked with other processing operations
  • The deposited cookie is only used to produce anonymous statistics
  • The cookie does not allow the user's navigation on other sites to be tracked.

Third party cookies to improve the interactivity of the site

This site relies on certain services provided by third parties which allow :

  • to offer interactive content;
  • improve usability and facilitate the sharing of content on social networks;
  • view videos and animated presentations directly on our website;
  • protect form entries from robots;
  • monitor the performance of the site.

These third parties will collect and use your browsing data for their own purposes.

How to accept or reject cookies

When you start browsing an eZpublish site, the appearance of the "cookies" banner allows you to accept or refuse all the cookies we use. This banner will be displayed as long as you have not made a choice, even if you are browsing on another page of the site.

You can change your choices at any time by clicking on the "Cookie Management" link.

You can manage these cookies in your browser. Here are the procedures to follow: Firefox; Chrome; Explorer; Safari; Opera

For more information about the cookies we use, you can contact INRAE's Data Protection Officer by email at or by post at :


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

Last update: May 2021

Menu Logo Principal Institut Agro Montpellier LEPSE membre de University of Montpellier Labex AGRO Institut Carnot DigitAg

Home page

Roucou Agathe

Roucou Agathe
PhD student

Thesis defended on 09.11.2018

Topic: "Ecophysiological trade-offs and biophysical constraints in cereals: impacts of agronomic selection and environmental conditions"

Abstract :

Faced with new environmental, economic and societal challenges in agriculture, plant breeding must rely on new selection strategies to maintain production while limiting the use of inputs. Targeted improvement of yield-related agronomic traits is made difficult by covariations with other undesired traits. In wild species, a comparative ecophysiology approach, based on the analysis of functional traits, i.e. traits related to the biological functions and performance of the plant (growth, survival and reproduction), has made it possible to highlight ecophysiological and biophysical constraints and trade-offs related to resource use. Identifying and quantifying these constraints in crop species, and their variability in the face of environmental factors, is essential for adapting targeted selection for traits of agronomic interest. This thesis focuses on the genetic variability of two phenotypic relationships particularly studied in functional ecology: the leaf economy spectrum and allometric relationships. Genotypes of five cereal species that are more or less domesticated and/or more or less selected were studied from this perspective. The comparative analysis of this intra- and interspecific variability was based on original data obtained during experiments in high-throughput phenotyping platforms and in the field. This work made it possible to i) highlight the selection of a strategy that favours resource acquisition functions during the domestication of durum wheat, ii) quantify the impact of light availability on the allometric response of 337 maize hybrids to edaphic water deficit, and iii) to illustrate the existence and genetic diversity of the leaf economy spectrum in 30 maize lines, 23 millet lines, 19 sorghum lines and 25 soft wheat lines under optimal and edaphic water deficit conditions. By means of multi-species and multi-genotype analyses, our comparative approach has made it possible to assess and discriminate the phenotypic variability of cereals in response to domestication and water stress. The study of constraints and trade-offs highlighted the non-existence of certain phenotypic combinations, a result that should be taken into account during varietal selection but also for cultivation practices.

Keywords: Comparative ecophysiology - Cereal - Leaf economy spectrum - Allometry - High-throughput phenotyping - Domestication - Agronomic selection - Environmental stress - Functional trait

Thesis available for consultation here

Supervisors : Denis VILE (thesis director), Cyrille VIOLLE (co-supervisor)

Project : ERC StG2014 - CONSTRAINTS