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 BIA

Home page

Biofuel: the impact of lignins

Mastering a key stage of lignification increases the yield of fermentable sugars by 140%.

The plant cell wall is composed of polysaccharides that are a source of energy for animals and humans. However, the stem walls of plants are also soaked with lignins, complex phenolic compounds that inhibit biorefinery saccharification.

The saccharification process refers to the production of simple and fermentable sugars, from polysaccharides such as cellulose, through the activity of biomass degradation enzymes. This is a prerequisite for the production of ethanol by fermentation.

In order to optimize bioethanol production from grasses, researchers are working on a model species, related to wheat and barley, Brachypodium distachyon.

This study, the result of an international collaboration, demonstrated that by reducing the activity of two laccases (enzymes involved in lignin production), the saccharification yield could be increased by 140% in this species.

This work has also shown that the decrease in laccase activity is accompanied by a decrease in lignin content but does not significantly affect the development of the plant; this is a crucial point for the transfer of this knowledge to other field crop species. The same laccases have been identified in species such as rice and maize.

It would therefore now be possible, by the varietal selection, to consider plants with reduced laccase activities, with fewer lignins, more suitable for biofuel production.


See also

Related publication: Le Bris P, Wang Y, Barbereau C, Antelme S, Cezard L, Legee F, D'Orlando A, Dalmais M, Bendahmane A, Schuetz M, et al. 2019. Inactivation of LACCASE8 and LACCASE5 genes in Brachypodium distachyon leads to severe decrease in lignin content and high increase in saccharification yield without impacting plant integrity. Biotechnol Biofuels 12: 181.