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 Logo UCA

Home page


 SUREAU (Hydraulic Safety and Drought Resistance of Trees)

Leader : Stéphane HERBETTE

SUREAU staff

The research of the FOLEAU and SUREAU teams focuses on the physiological and genetic determinants of the hydraulic functioning of trees and the implications on their growth and resistance to drought.

The conductive system of raw sap ensures the water supply to the trees and thus conditions their water status. The modulation of the functional characteristics of this system by the variables of the environment has major implications for the physiology of the tree. The team's objective is to highlight the physiological processes and genetic bases that govern the hydraulic functioning of the tree. To achieve these objectives, specific methodologies are developed by the team (Xyl'em, Cavitron, Cryo-SEM, Micro-tomography).

Two areas of research are being developed :

- The first concerns the modulation of resistances and hydraulic capacities by the variables of the medium and the involvement of aquaporins in this response (FolEau).

- The second axis focuses on the vulnerability of vascular tissues to cavitation and the impact of embolism formation on the physiology of the tree. The structural and genetic basis of cavitation resistance is being investigated (SurEau).

The final objectives of this research are to improve the drought resistance of trees, both in terms of their growth and their survival (resilience) to extreme droughts.


Presentation of HYDRO methods

 ©Photos PIAF