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: https://www.ghostery.com/fr/products/

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: http://www.youronlinechoices.com/fr/controler-ses-cookies/, 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

Realytics
Google Analytics
Spoteffects
Optimizely

Targeted advertising cookies

DoubleClick
Mediarithmics

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 cil-dpo@inra.fr or by post at:

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

Dernière mise à jour : Mai 2018

Menu Logo Principal Agrocampus Ouest Rennes 1 University Logo Igepp

Home page

Camille Gautier

Plant root exudates as new bio-control products against nematodes.

Thesis started November, 15th, 2016. Defended in May, 19th, 2020.
Fund:  CIFRE
Direction: Eric Grenier, Josselin Montarry, Sylvain Fournet

Abstract: Cyst nematodes are among the most harmful pests of cultivated crops causing important economic losses. For cyst nematodes, the hatching is stimulated by root exudates released by the host plant. The removal of chemical nematicides requires development of alternative approaches to protect crops. For this purpose, root exudates may constitute an effective and innovative biocontrol method that could be used in the absence of the host plant to induce a “suicide hatching” of nematode and to control cyst nematodes’ pressure on crop. This work aimed to anticipate the effectiveness of the suicide hatching strategy, taking into account the influence of the genetic diversity of nematode populations and the microbial composition of soils. First, the level of dependence between root exudates from wild Solanum species and Globodera pallida populations for the hatching trait was evaluated and highlighted a strong effect of the geographical location of root exudates. Second,  root exudates from different plant species were tested on the hatching of representative populations of the genetic diversity for three cyst nematodes. Significant differences were obtained among populations for a given nematode species but root exudates provided a high level of hatching of nematodes. Third, the impact of microbial communities of soil on the  efficiency of root exudates to stimulate the hatching was measured. Significant differences of suicide hatching between different soils were obtained but the hatching rate remained high. These research efforts provide key elements for the development of root exudates as new biocontrol strategy.

--------------------------------------------
Poster au format pdf

Poster-Camille-Gautier