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

Dernière mise à jour : Mai 2018

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Valérie Legué

Valérie LEGUÉ

Professeure à l'Université Blaise Pascal

Valérie Legué


I received my PhD in Plant biology at the University of Paris 6 in 1994 in the G. Perbal’s group. My research was focused on the perception of gravity in roots.
During my post-doc (1994-1996), I spent few months in the S. Gilroy’s team where I studied the implication of calcium in the gravity perception.

From 1997 to 2013, I were as assistant-professor at Nancy University (Lorraine University) in the «Trees/Micro-organisms Interactions» laboratory ( My main research topic concerned the studies of auxin signalling in poplar root in response to the ectomycorrhizal fungus, Laccaria bicolor. I am also interested by the cellular mechanics involved in the adventitious root formation in poplar.

In 2013, I obtained a new position as Professor at The University of Clermont-Ferrand (Unversity Blaise Pascal) in the PIAF.

Current research

My new research topic is to understand how roots sense and perceive the gravity and how this signal regulates the root growth.  In the group, we combine microscopy approaches with molecular biology and biomechanics models. I use microgravity conditions through some space experiments to study the gravity signalling events (

Expérimentation : des lentilles dans l'espace

Valérie Legué, enseignante-chercheur en biologie végétale, et son équipe étudient les mécanismes de la perception de la gravité dans les racines. Leurs recherches les ont amenée à concevoir un projet spatial qui vient de se concrétiser. Soutenu par l’Agence spatiale européenne (ESA) et le Centre nationale des études spatiales (CNES), l’expérience spatiale Gravi-2 s’est déroulée du 5 au 9 mai 2014 à bord de la Station spatiale internationale (ISS).

12 graines de lentilles dans l'espace


300 graines de lentille se sont envolées pour cette expérience, grace à l'obtention d'une place dans le programme "Gravi-2" au sein de la station spatiale internationale.


Conférence mercredi 29 avril 2015 :

Les plantes dans l'espace : science fiction ?

Annonce UBP :

Conférence en ligne : 


Lien site web grand public du CNES :

Lien blog Gravi-2 :


Recent publications

H. Chauvet, O. Pouliquen, Y. Forterre, V. Legué et B. Moulia, 2016. Inclination not force is sensed by plants during shoot gravitropism. Scientific reports. Sci Rep., 6:35431. doi: 10.1038/srep35431

C. Plomion, C. Bastien, M.-B. Bogeat-Triboulot, L. Bouffier, A. Déjardin, S. Duplessis, B.Fady, M. Heuertz, A.-L. Le Gac, G. Le Provost, V. Legué, M.-A. Lelu-Walter, J.-C. Leplé, S. Maury, A. Morel, S. Oddou-Muratorio, G. Pilate, L. Sanchez, I.Scotti, C.Scotti-Saintagne, V. Segura, J.-F. Trontin et C. Vacher, 2015. Forest tree genomics: 10 achievements from 1 the past 10 years and future prospects. Annals of Forest Science.

A. Vayssières, A. Pěnčík, J. Felten, A. Kohler, K. Ljung, F. Martin, et V. Legué, 2015. Development of the Populus-Laccaria bicolor ectomycorrhiza modifies root auxin metabolism, signalling and response. Plant Physiology. 169, 890-902.

Lopez D, Tocquard K, Venisse JS, Legué V, Roeckel-Drevet P., 2014. Gravity sensing, a largely misunderstood trigger of plant orientated growth. Front Plant Sci. 2014 Nov 5;5:610. doi: 10.3389/fpls.2014.00610. Review.

V. Legué, A. Rigal and R. P. Bhalerao, 2014. Adventitious root formation in tree species: involvement of transcription factors. Physiologia Plantarum, 151, 192–198.

S. Hacquard, E. Tisserant, A. Brun, V. Legué, F. Martin and A Kohler, 2013. Laser microdissection and microarray analysis of Tuber melanosporum ectomycorrhizas reveal functional heterogeneity between mantle and Hartig net compartments. Environmental microbiology, DOI: 10.1111/1462-2920.12080.

S. Poornima, V. Legué, A. Vayssières, F. Martin, G. Tuskan and U.C. Kalluri, 2012. Involvement of auxin pathways in modulating root architecture during mutualist plant-microorganism interactions. Revue. Plant Cell Environ. 2012 Nov 12. doi: 10.1111/pce.12036.

A. Rigal, Y. S. Yordanov, I. Perrone, A. Karlberg, E. Tisserant, C. Bellini, V. B. Busov, F. Martin, A. Kohler, R. Bhalerao andV. Legué, 2012. The Populus AINTEGUMENTA Like 1 homeotic transcription factor PtAIL1 controls the formation of adventitious root primordia. *Auteur correspondant. Plant Physiology, 160, 1996-2006.

R. Tanegmart, I. Zelko, T. Sterckeman, V. Legué and A. Lux, 2011. Relationship between root structure and root cadmium uptake in maize. Environmental and Experimental Botany, 71, 241-248.

S. Hacquard, D.L. Joly, Y.C. Lin, E. Tisserant, N. Feau, C. Delaruelle, V. Legué, A. Kohler, P. Tanguay, B. Petre, P. Frey, Y. Van de Peer, P. Rouz, F. Martin, R.C. Hamelin and S. Duplessis, 2011. A comprehensive analysis of genes encoding small secreted proteins identifies candidate effectors in Melampsora larici-populina (poplar leaf rust). Mol Plant Microbe Interact, 25, 279-293.

J.M. Plett, M. Kemppainen, S.D. Kale, A. Kohler, V. Legué, A. Brun, B.M. Tyler, A.G. Pardo and F. Martin, 2011. A secreted effector protein of Laccaria bicolor is required for symbiosis development. Current biology, 21, 1197-1203.

Publications (1997-2010)

S. Hacquard, C. Delaruelle, E. Tisserant, V. Legué, A. Kohler, P. Frey, F. Martin, and S. Duplessis, 2010. Laser capture microdissection of uredinia formed by Melampsora larici-populina revealed a transcriptional switch between biotrophic and sporulation. Molecular Plant Microbes Interactions, 10, 1275-1286.

J. Felten, V. Legué, F.A. Ditengou, 2010. Lateral root stimulation in the early interaction between Arabidopsis thaliana and the ectomycorrhizal fungus Laccaria bicolor: Is fungal auxin the trigger?. Plant Signaling & Behavior, 5, 1-4.

J. Felten, A. Kohler, E. Morin, R.P. Bhalerao, Kl. Palme, F. Martin, F.A. Ditengou, et V. Legué, 2009. The ectomycorrhizal fungus Laccaria bicolor stimulates lateral root formation in poplar and Arabidopsis through auxin transport and signaling. Plant Physiology, 151, 1991-2005.

S. Layec, J. Gérard, V. Legué, M-P Chapot-Chartier, P. Courtin, F. Borges, B. Decaris et N. Leblond-Bourget, 2009. The CHAP domain of Cse functions as an endopeptidase that acts at mature septa to promote Streptococcus thermophilus cell separation. Molecular Microbiology, 71, 1205-1217.

F Martin, A Aerts, D Ahrén, A Brun, F Duchaussoy, J Gibon, A Kohler, E Lindquist, V. Pereda, A Salamov, HJ Shapiro, J Wuyts, D Blaudez, M Buée, P Brokstein, B Canbäck, D. Cohen, PE Courty, PM Coutinho, EGJ Danchin, C Delaruelle, JC Detter, A Deveau, S DiFazio, S. Duplessis, L Fraissinet-Tachet, E Lucic1 , P Frey-Klett, C Fourrey, I Feussner, G Gay, J Grimwood, PJ. Hoegger, P Jain, S Kilaru, J Labbé, YC Lin, V Legué, F Le Tacon, R Marmeisse, D Melayah, B. Montanini, M Muratet, U Nehls, H Niculita-Hirzel, MP Oudot-Le Secq, M Peter, H Quesneville, B. Rajashekar, M Reich, N Rouhier, J. Schmutz, T Yin, M Chalot, B Henrissat, U Kuees, S. Lucas, Y Van de Peer, G Podila, A Polle, PJ Pukkila, PM. Richardson, P Rouzé, IR. Sanders, JE Stajich, A Tunlid, G Tuskan et V. Grigoriev. 2008. The genome of Laccaria bicolor provides insights into mycorrhizal symbiosis. Nature, 452, 88-93.

D. Driss-Ecole, V. Legué, E. Carnero-Diaz et G. Perbal, 2008. Gravisensitivity and automorphogenesis of lentil seedling roots grown on board the International Space Station. Physiologia Plantarum, 13, 191-201.

A. Dauphin, J. Gérard, F. Lapeyrie et V. Legué, 2007. Fungal hypaphorine reduces growth and induces cytosolic calcium in root hairs of Eucalyptus globules, Protoplasma, 231, 83-88.

A. Dauphin, N. De Ruijter, A.M. Emons et V. Legué, 2006. Actin organization during Eucalyptus root hair development and its response to fungal hypaphorine. Plant Biology, 8, 1-8.

A. Jambois, A. Dauphin, T. Kawano, F. Ditengou, F. Bouteau, V. Legué et F. Lapeyrie, 2005. Competitive antagonism between IAA and indole alkaloid hypaphorine must contribute to regulate ontogenesis. Physiologia Plantarum, 123, 120-129.

D. Reboutier, M. Bianchi, M. Brault, C. Roux, A. Dauphin, J.P. Rona, V. Legué, F. Lapeyrie et F. Bouteau, 2002. The indolic coumpound hypaphorine produced by ectomycorrhizal fungus interferes with auxin action and evokes early responses in nonhost Arabidopsis Thaliana. Molecular Plant Microbes Interactions, 15, 932-938.

F.Yu, D. Driss-Ecole, J. Rembur, V. Legué et G. Perbal., 1999. Effect of microgravity on the cell cycle in the lentil root. Physiologia Plantarum, 105, 171-178.

V. Legué, E. Blancaflor, C. Wymer, G. Perbal, D. Fantin et S. Gilroy, 1997. Cytoplasmic free Ca2+ in Arabidopsis roots changes in response to touch but not gravity. Plant Physiology, 114, 789-800.