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 Plant pathology unit - INRA AVIGNON

Pathologie vegetale

Zone de texte éditable et éditée et rééditée

MORRIS Cindy

Research Director, Head of the MISTRAL research team

CONTACT/PROFILE

 RESEARCH ACTIVITIES

  • My research concerns bacterial ecology. My team seeks to understand how the adaptation of bacteria to their environment affects two seemingly conflicting impacts on the environment: their capacity to
    • cause disease, and in particular newly emerging diseases
    • play beneficial roles in major environmental phenomena.
  • The bacterium Pseudomonas syringae is the focus of our work. It is a recurring pathogen on a wide range of crops of major importance. The bacterium is also one of the most highly active, naturally occurring ice nucleators in the environment. Its ice nucleation activity - at temperatures warmer than most other ice nucleators - and its ability to ascend into clouds with air currents has solicited great interest in its possible role in the atmospheric processes that lead to rainfall.
Effect of microbes on land-atmosphere interactions

Bioprecipitation (Morris, C.E. et al., 2014)

click on the figure to enlarge

Plant pathogens can reside is many habitats outside of agriculture as well as within and can move between these different habitats.  They can also have traits that are useful for their adaptation to all these different habitats and that lead them to play roles in a range of environmental phenomenon. For the bacterium Pseudomonas syringae, we study the influence of environmental habitats on the emergence of plant disease. We also study the dissemination of P. syringae via the water cycle and its influence on atmospheric processes that affect rainfall and lightning.

  • One of the long term goals of our work is to anticipate encounters of pathogenic strains of P. syringae from environmental reservoirs with crops and to identify the conditions most favorable for emergence. To accomplish this goal we :
    • identify the natural environmental reservoirs of P. syringae,
    • determine the role of these reservoirs in bacterial evolution,
    • assess the probability of dissemination to cultivated plants,
    • identify climatic factors most favorable for disease.
  • The other long term goal of our work is to contribute to land management strategies and policies that balance the dual roles of microorganisms that are plant pathogens and that are beneficial for rainfall. To accomplish this goal we :
    • identify sources of ice nucleation active microorganisms that are also plant pathogens,
    • evaluate the flux of these microorganisms from land covers to the atmosphere,
    • contribute to research on the role of microorganisms in cloud physics, including processes linked to rainfall, lightning and albedo,
    • assess and map the intensity of land-atmosphere feedbacks mediated by microorganisms.

 SELECTED PUBLICATIONS

For the complete and most recent list of publications see ProdInra, the open archive of INRA.

  • Bigg E.K., Soubeyrand S., Morris C.E. 2015 Persistent after-effects of heavy rain on concentrations of ice nuclei and rainfall suggest a biological cause.  Atmos. Chem. Phys. 15: 2313-2326D. DOI : 10.5194/acp-15-2313-2015 http://prodinra.inra.fr/record/292911
  • Bartoli C., Lamichhane J.R., Berge O., Guilbaud C., Varvaro L., Balestra G., Vinatzer B.A., Morris C.E. 2015 A framework to gauge the epidemic potential of plant pathogens in environmental reservoirs: the example of kiwifruit canker.  Mol Plant Pathol 16:137-149. DOI : 10.1111/mpp.12167 http://prodinra.inra.fr/record/295519
  • Berge O., Monteil C.L., Bartoli C., Chandeysson C., Guilbaud C., Sands D.C., Morris C.E.   2014. A user’s guide to a data base of the diversity of Pseudomonas syringae and its application to classifying strains in this phylogenetic complex. PLoS One 9, e105547. DOI : 10.1371/journal.pone.0105547 http://prodinra.inra.fr/record/270035
  • Morris C.E., Conen F., Huffman J.A., Phillips V., Pöschl U., Sands D.C. 2014.  Bioprecipitation: A feedback cycle linking Earth history, ecosystem dynamics and land use through biological ice nucleators in the atmosphere. Global Change Biology 20:341-351 DOI : 10.1111/gcb.12447 http://prodinra.inra.fr/record/255001
  • Morris, C. E., Leyronas C., Nicot P.C. 2014. Movement of bioaerosols in the atmosphere and the consequences for climate and Mmicrobial Eevolution (Chapter 16), p. 393-416. In I. Colbeck and M. Lazaridis (ed.), Aerosol Science: Technology and Applications. John Wiley & Sons, Ltd. http://prodinra.inra.fr/record/255016
  • Morris C.E., Sands D.C., Glaux C., Samsatly J., Asaad S., Moukahel A.R., Gonçalves F.L.T., Bigg E.K. 2013. Urediospores of rust fungi are ice nucleation active at > −10 °C and harbor ice nucleation active bacteria.  Atmos. Phys. Chem. 13:4223-4233. DOI : 10.5194/acp-13-4223-2013 http://prodinra.inra.fr/record/211422
  • Morris C.E., Monteil C.L., Berge O. 2013. The life history of Pseudomonas syringae: linking agriculture to Earth system processes. Annu. Rev. Phytopath. 51:85-104. DOI : 10.1146/annurev-phyto-082712-102402 http://prodinra.inra.fr/record/213942
  • Morris C.E., Bardin M. Kinkel L.L., Moury B., Nicot P.C., Sands D.C. 2009. Expanding the paradigms of plant pathogen life history and evolution of parasitic fitness beyond agricultural boundaries. PLoS Pathogens 5(12) : e1000693. DOI : 10.1371/journal.ppat.1000693 http://prodinra.inra.fr/record/39831
  • Christner B.C., Morris C.E., Foreman C.M., Cai, R., Sands D.C. 2008. Ubiquity of biological ice nucleators in snowfall. Science 319:1214. DOI : 10.1126/science.1149757 http://prodinra.inra.fr/record/20734

 FOR MORE INFORMATION