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Unité Mixte de Recherche Inra-Univ. Bordeaux "Biodiversité Gènes et Communautés" - Biogeco

Unité mixte de recherche (Inra, Univ. Bordeaux 1) Biodiversité, gènes et communautés (Biogeco)


INRA Bordeaux-Aquitaine
Site de Recherches Forêt-Bois
69 route d'Arcachon
33612 CESTAS Cedex - FRANCE

Desprez-Loustau Marie-Laure (Chercheur)

05 57 12 27 28, loustau_at_bordeaux.inra.fr


Pathologie forestière

Forest disease ecology



69 Route d’Arcachon
33610 Cestas, France

Email : Marie-Laure.Loustau_at_bordeaux.inra.fr


Welcoming Andrin Gross  in January 2017 -

Understanding multiple invasions by cryptic exotic species in a pathogen complex; oak powdery mildew in Europe as a case study

Soon attending the

POWDERY MILDEW School in Eger (9-13 september)

• Published in 2017

The emerging science of linked plant–fungal invasionsIA Dickie, JL Bufford, RC Cobb, ML Desprez‐Loustau, G Grelet, PE Hulme, ...New Phytologist

Short Rotations in Forest Plantations Accelerate Virulence Evolution in Root-Rot Pathogenic FungiJP Soularue, C Robin, ML Desprez-Loustau, C DutechForests 8 (6), 205

Further Support of Conspecificity of Oak and Mango Powdery Mildew and First Report of Erysiphe quercicola and Erysiphe alphitoides on Mango in Mainland EuropeML Desprez-Loustau, M Massot, N Feau, T Fort, A de Vicente, JA Torés, ...Plant Disease, PDIS-01-17-0116-RE

Can oak powdery mildew severity be explained by indirect effects of climate on the composition of the Erysiphe pathogenic complex?B Marçais, D Piou, D Dezette, ML Desprez-LoustauPhytopathology 107 (5), 570-579

Research interests

My research deals with the epidemiology of forest diseases, with an ecological and evolutionary perspective. My aim is to add new knowledge to the understanding of interactions between hosts (trees), parasites (pathogenic fungi) and the environment  (climate, other fungi), addressing both fundamental questions of disease ecology and forest management issues (emergence of diseases). My research is principally based on experimental work and field monitoring. I have developped pluri-disciplinary approaches in collaboration with geneticists, ecophysiologists, ecologists, modellers, and I have been working with various biological models: pine twisting rust, oak Phytophthoras, oak powdery mildew, Diplodia shoot blight, etc....

My current research mainly focuses on the oak-powdery mildew pathosystem, addressing questions such as :

- cryptic species involved in the disease complex (Erysiphe alphitoides, E. quercicola, E hypophylla): epidemiological perspective (factors of distribution, relationship with the severity of disease); ecological perspective (niche differentiation; interactions between species; cf ANR FUNFIT project); evolutionary perspective (phylogeny; history of invasion and co-evolution with oaks: cf UE-ANR Biodiversa RESIPATH project)

- co-adaptation between host and pathogen : host-pathogen phenological synchrony, host tolerance, genetic basis of host resistance, selective effects of oak powdery mildew on oak populations

- hyperparasitism of oak powdery mildew by Ampelomyces sp and related species

pathologie forestière, épidémiologie, écologie de la santé, émergence de maladies, champignons phytopathogènes, invasions biologiques, changement global, oïdium du chêne

forest pathology, epidemiology, disease ecology, disease emergence, phytopathogenic fungi, biological invasion, global change, oak powdery mildew

Other assignments

Member of Editorial Board Forest Pathology
Consultant Professor at Bordeaux Science Agro and teaching in several Master courses (Univ Bordeaux)
Corresponding Member of the  French Academy of Agriculture
Expert at the ANSES Commitee of Biotic Risks on Plant Health

Education and Academic career

since 1985 : Full time researcher (senior scientist) at INRA, Bordeaux, France
2002 : Habilitation, University of Paris XI (Orsay), France
1996-1997 : Visiting scientist, University of Edinburgh (Richard Ennos)
1984-1985 : Post-doctoral assistant, Laval University, Québec, Canada (Michel Dessureault)
1983 : Ph-D Plant Pathology, University of Paris XI (Orsay), France - Supervisor : Claude Delatour
1980-1984 : Research Assistant, INRA Nancy
1980 : Agricultural Engineer, MSc Plant Pathology, Institut National Agronomique Paris-Grignon, France


(cf my Google scholar profile)

Hamelin FM, Bisson A, Desprez‐Loustau ML, Fabre F, Mailleret L (2016) Temporal niche differentiation of parasites sharing the same plant host: oak powdery mildew as a case study. Ecosphere 7(11).(pdf)

Bert D, Lasnier J-B, Capdevielle X, Dugravot A, Desprez-Loustau M-L (2016) Powdery Mildew Decreases the Radial Growth of Oak Trees with Cumulative and Delayed Effects over Years. PLoS ONE 11(5): e0155344. doi:10.1371/journal.pone.0155344 (pdf)

Desprez-Loustau ML,  Aguayo J,  Dutech C,  Hayden KJ, Husson C, Jakuschkin B, Marçais B, Piou D, Robin C,  Vacher, C  (2015) An evolutionary ecology perspective to address forest pathology challenges of today and tomorrow. Annals of Forest Science, 1-23 (pdf)

Dantec CF, Ducasse H, Capdevielle X, Fabreguettes O, Delzon S, Desprez-Loustau ML(2015) Escape of spring frost and disease through phenological variations in oak populations along elevation gradients. Journal of Ecology (pdf)

Desprez-Loustau ML, Saint-Jean G, Barrès B, Dantec C, Dutech C. 2014. Oak powdery mildew changes growth patterns in its host tree: host tolerance response and potential manipulation of host physiology by the parasite. Annals of Forest Science 71: 563-573 (pdf)

 Marçais B, Desprez-Loustau M-L, 2014. European oak powdery mildew: impact on trees, effects of environmental factors, and potential effects of climate change. Annals of Forest Science 71: 633-642 (pdf)

 Santini, A.; Ghelardini, L.; De Pace, C.; Desprez-Loustau ML et al. 2013. Biogeographical patterns and determinants of invasion by forest pathogens in Europe. NEW PHYTOLOGIST 197: 238-250 

 Jactel, H, Petit, J, Desprez-Loustau, M-L, Delzon, S, Piou, D, Battisiti, A, Koricheva, J. 2012. Drought effects on damage by forest insects and pathogens: a meta-analysis. Global Change Biology 18: 267-276

 Cordier T, Robin C,  Capdevielle X,  Desprez-Loustau ML, Vacher C. 2012. Spatial variability of phyllosphere fungal communities: genetic distance predominates over geographic distance in a European beech stand (Fagus sylvativa L.). Fungal Ecology 5: 509-520

 Feau N, Lauron-Moreau A, Piou D, Marçais B, Dutech C, Desprez-Loustau ML. 2012. Niche partitioning of genetic lineages involved in the oak powdery mildew complex. Fungal Ecology 5: 154-162 (pdf)

 Cordier, T; Robin, C; Capdevielle X, Fabreguettes O, Desprez-Loustau ML, Vacher C. 2012. The composition of phyllosphere fungal assemblages of European beech (Fagus sylvatica) varies significantly along an elevation gradient.  New Phytologist 196: 510-519  

 Desprez-Loustau M-L,  Feau N,  Mougou-Hamdane A,  Dutech C. 2011. Interspecific and intraspecific diversity in oak powdery mildews in Europe: coevolution history and adaptation to their hosts. Mycoscience 52:163-175

 Essl F, Dullinger S, Rabitsch W, Hulme PE, Hülber K, Jarosík V, Kleinbauer I, Krausmann F, Kühn I, Nentwig W, Vilà M, Genovesi P, Gherardi F, Desprez-Loustau ML, Roques A, Pysek P. 2011. Socioeconomic legacy yields an invasion debt. 2011.  PNAS 108: 203-207

 Fabre B, Piou D , Desprez-Loustau ML, MarçaisB. 2011. Can the emergence of pine Diplodia shoot blight in France be explained by changes in pathogen pressure linked to climate change? Global Change Biology 18: 267-276.

 Feau N, Decourcelle T, Husson C, Desprez-Loustau M-L, Dutech C. 2011. PHYLORPH: Finding single copy genes out of sequenced genomes for multilocus phylogenetics in non-model fungi. PLoS ONE April 2011,Volume 6, Issue 4: e18803

 Iturritxa E, Desprez-Loustau ML García-Serna I, Quintana E, Mesanza N, and  Atkiens J. 2011. Effect of alternative disinfection treatments against fungal canker in seeds of Pinus radiata. Seed Technol. 33, 88-110.

 Philibert A, Desprez-Loustau ML, Fabre B, Frey P, Halkett F, Husson C, Lung-Escarmant B, Marçais B, Robin C, Vacher C, Makowski D. 2011. Predicting invasion success in pathogenic fungi from species traits. Journal of Applied Ecology 48: 1381-1390

 Vilà, M., Basnou, C., Pyšek, P., Josefsson, M., Genovesi, P., Gollasch, S., Nentwig, W., Olenin, S., Roques, A., Roy, D., Hulme, P.E., DAISIE partners (2010): How well do we understand the impacts of alien species on ecosystem services? A pan-European cross-taxa assessment. Frontiers in Ecology and the Environment 8 (3): 135-144

 Pyšek P, Jarošíkb V, Hulme PE, Kühn I, Wilda J, Arianoutsou M, Bacher S, Chiron F, Didžiulisi D, Essl F, Genovesi P,Gherardi F, Hejda M, Kark S, Lambdon PW, Desprez-Loustau M-L, Nentwig W, Pergl J, Poboljša K, Rabitsch W, Roques A, Roy DB, Shirley S, Solarz W, Vilà M & Winter M. 2010. Disentangling the role of environmental and human pressures on biological invasions. PNAS 107: 12157-12162

 Vacher C, Daudin J-J, Piou D, Desprez-Loustau M-L. 2010. Ecological integration of alien species into a tree-fungus network. Biological Invasions 12:3249–3259

Desprez-Loustau M-L, Vitasse Y, Delzon S, Capdevielle X, Marçais B, Kremer A. 2010. Are plant pathogen populations adapted for encounter with their host? A case study of phenological synchrony between oak and an obligate fungal parasite along an altitudinal gradient. J Evol Biol (pdf)

Marçais B, Kavkova M And Desprez-Loustau M.L 2009. Phenotypic variation in phenology of ascospore production between European populations of oak powdery mildew. Annals of Forest Science (pdf)

Mougou Hamdane A, Giresse X, Dutech C And Desprez-Loustau Ml. 2010. Spatial distribution of lineages of oak powdery mildew fungi in France, using quick molecular detection methods. Annals of Forest Science (pdf)

Desprez-Loustau M-L. 2009. The alien fungi of Europe. In: DAISIE Handbook of alien species in Europe Springer, Dordrecht. 15–28

Desprez-Loustau Ml, Courtecuisse R, Robin C, Husson C, Moreau Pa, Blancard D, Selosse Ma, Lung-Escarmant B, Piou D, Sache I. 2010. Species diversity and drivers of spread of alien fungi (sensu lato) in Europe with a particular focus on France. Biological Invasions (pdf)

DESPREZ-LOUSTAU ML 2009. Invasions biologiques et émergences de maladies. In : Emergences Eds Barnouin & Sache. Editions QUAE, Paris
Mougou A, Dutech C, Desprez-Loustau ML. 2008. New insights into the identity and origin of the causal agent of oak powdery mildew in Europe. Forest Pathology 38:275-287. (pdf)

Vacher C, VILE D, Helion E, Piou D, Desprez-Loustau ML 2008.Distribution of parasitic fungal species richness: influence of climate versus host species diversity. Diversity and distributions 14: 786-798. (pdf)

Vacher C, Piou D, Desprez-Loustau ML. Architecture of an antagonistic tree/fungus network: the asymmetric influence of past evolutionary history. PLoS ONE, pub 5 mars 2008. (pdf)

DESPREZ-LOUSTAU ML, ROBIN C, BUÉE M, COURTECUISSE R, GARBAYE J, SUFFERT F, SACHE I, RIZZO D. 2007. The fungal dimension of biological invasions. Trends Ecol Evol 22: 472-480. (pdf)

DESPREZ-LOUSTAU ML, ROBIN C, REYNAUD G, DÉQUÉ M, BADEAU V, PIOU D, HUSSON C, MARÇAIS B. 2007. Simulating the effects of a climate change scenario on geographical range and activity of forest pathogenic fungi. Can J Plant Pathol 29(2): 101-120.

DESPREZ-LOUSTAU ML, MARÇAIS B, DE LA ROCQUE S. 2006. Changement climatique et maladies dans les écosystèmes naturels et agroécosystèmes. Biofutur 270 :37-40.

DESPREZ-LOUSTAU ML, MARCAIS B, NAGELEISEN LM, PIOU D, VANNINI A. 2006. Interactive effects of drought and pathogens in forest trees. Annals of Forest Science 63: 597-612. (free access:http://www.afs-journal.org/content/view/218/43/lang,en/)

Bergot M, Cloppet E, Pérarnaud V, Déqué M, Marçais B, Desprez-Loustau ML. 2004. Simulation of potential range expansion of oak disease caused by Phytophthora cinnamomi under climate change. Global Change Biology 10 : 1-14. (pdf)

MAUREL M., ROBIN C., SIMONNEAU T., LOUSTAU D., DREYER E., DESPREZ-LOUSTAU M. L. 2004. Stomatal conductance and root-to-shoot signalling in chestnut saplings exposed to Phytophthora cinnamomi or partial soil drying. Functional Plant Biology 31 (1): 41-51

Marçais B, Bergot M, Perarnaud V, Levy A & Desprez-Loustau ML. 2004. Prediction and mapping of the impact of winter temperatures on the development of Phytophthora cinnamomi induced cankers on red and pedunculate oak. Phytopathology 94 (8): 826-831. (pdf)

DELATOUR C, DESPREZ-LOUSTAU ML, ROBIN C . 2002. Phytophthora : que sait-on de leur influence sur la santé des forêts européennes ? Les Cahiers du DSF 1-2002. La Santé des Forêts [France] en 2000 et 2001 : 108-114. Min. Agri. Alim. Pêche Aff.rur. (DERF), Paris

MAUREL M., ROBIN C., CAPRON G., DESPREZ-LOUSTAU M. L. 2001. Effects of root infection associated with Phytophthora cinnamomi on water relations, biomass accumulation, mineral nutrition and vulnerability to water deficit of five oak and chestnut species. Forest Pathology 31 : 353-369. (pdf)

MAUREL M., ROBIN C., CAPDEVIELLE X., LOUSTAU D., DESPREZ-LOUSTAU M. L. 2001. Effects of variable root damage caused by Phytophthora cinnamomi on water relations of chestnuts saplings. Annals of Forest Science 58:639-651. (pdf)

QUENCEZ C., DESPREZ-LOUSTAU M.L., BASTIEN C. 2001. Reliability of field, greenhouse and cut-shoot screening procedures for evaluating susceptibility of Scots pine to Melampsora pinitorqua. Forest Pathology 31(4) : 193-256. (pdf)

Robin C., CAPRON G., Desprez-Loustau M.L. 2001. Root infection by Phytophthora cinnamomi in three oak species: effect on water relations and interaction with flooding and drought. Plant Pathology, 50 :1-10. (pdf)

Robin C., Desprez-Loustau M.L. 1999. Evaluation des risques vis-à-vis de Phytophthora cinnamomi liés à la production de plants de feuillus en pépinières. Les Cahiers du DSF 1. La Santé des Forêts 1998, 90-92.

Desprez-Loustau M.L., Capron G., Dupuis, F. 1998. Relating germination dynamics of Melampsora pinitorqua teliospores to temperature and rainfall during overwintering. Eur J. For. Pathol. 28 : 335-347.

Robin C., Desprez-Loustau M.L.1998. Testing variability in pathogenicity of Phytophthora cinnamomi. Eur. J. Plant Pathol 104 : 465-475.

Robin C., Desprez-Loustau M.L., Capron G., Delatour C. 1998. First record in France and pathogenicity of Phytophthora cinnamomi on cork and holm oak. Annales des Sciences Forestières 55(8) : 869-883. (pdf)

BARADAT, P., DESPREZ-LOUSTAU, M.L, 1997. Analyse diallèle et intégration de la sensibilité à la rouille courbeuse dans le programme d’amélioration du Pin maritime des Landes. Ann. Sci. For. 54 : 83-106.

Desprez-Loustau M.L., Wagner K. 1997. Influence of silvicultural practices on twisting rust infection and damage in maritime pine, as related to growth. For. Ecol. Man. 98 :135-147.

Desprez-Loustau M.L., Wagner K. 1997. Components of maritime susceptibility to twisting rust. A path coefficient analysis. Eur. J. Plant Pathol. 103 :653-665.

MARCAIS, B., DUPUIS, F., DESPREZ-LOUSTAU M.L. 1996. Susceptibility of Quercus rubra root system to Phytophthora cinnamomi; comparison with chestnut and other oak species. Eur.J.For. Pathol. 6(3): 133-143.

MARCAIS, B., DUPUIS, F., DESPREZ-LOUSTAU M.L. 1996. Modelling the influence of winter frosts on the developement of the ink disease of oak, caused by Phytophthora cinnamomi. Ann. Sci. For. 53 : 369-382.

JACTEL H., DEPREZ-LOUSTAU M.L., LUNG-ESCARMANT B., 1995. Sylviculture intensive du pin maritime et risques phytosanitaires. Forêt- entreprise 105 (6-7) : 45-48.

DESPREZ-LOUSTAU M.L., DUPUIS, F. 1994. Variation in the phenology of shoot elongation between geographic provenances of maritime pine (Pinus pinaster) - Implications for the synchrony with the phenology of the twisting rust Melampsora pinitorqua. Ann. Sci. For. 51 : 553-568.
Robin C., Dupuis F., Desprez-Loustau M.L. 1994. Seasonal changes in northern red oak susceptibility to Phytophthora cinnamomi. Plant Disease 78 : 369-374.

MARCAIS, B., DUPUIS, F., DESPREZ-LOUSTAU M.L. 1993. Influence of water stress on susceptibility of red oak (Quercus rubraPhytophthora cinnamomi Rands. Eur. J. For. Pathol. 23 : 295-305. L.) to

DESPREZ-LOUSTAU, M.L, DUPUIS, F. 1992. A time-course study of teliospore germination and basidiospore release in Melampsora pinitorqua. Mycological Research 96(6) : 442-446.

DESPREZ-LOUSTAU M.L., DUPUIS, F., VIGUIE, A. 1992. Evaluation of single applications of sterol-inhibiting fungicides for control of pine twisting rust. Plant Disease 76 : 376-382

Robin C., Desprez-Loustau M.L., Delatour C. 1992. Spatial and temporal enlargement of cankers of Phytophthora cinnamomi in red oak. Can. J. For. Res. 22:3:362-366

Robin C., Desprez-Loustau M.L., Delatour C. 1992. Factors influencing the enlargement of cankers of Phytophthora cinnamomi in red oak. Can. J. For. Res. 22:3:367-374.

DESPREZ-LOUSTAU M.L. 1990. A cut-shoot bioassay for assessment of maritime pine susceptibility to twisting rust. Eur. J. For. Pathol. 20 : 386-391.DESPREZ-LOUSTAU, M.L, BARADAT, P. 1991. Variabilité inter-raciale de la sensibilité à la rouille courbeuse chez le Pin maritime. Ann. Sci. For. 48 : 497-511.

DESPREZ-LOUSTAU M.L., LE MENN, R., 1989. Epicuticular waxes and Melampsora pinitorqua behaviour on maritime pine shoots. A scanning electron microscope study. Eur. J. For. Pathol. 19 : 178-188.

DESPREZ-LOUSTAU M.L., Dessureault, M., 1988. Influence de stress contrôlés sur la sensibilité du Bouleau jaune au chancre godronien causé par Godronia cassandrae Peck. f.sp. betulicolaCan. J. For. Res. 17 : 121-127. Groves.

DESPREZ-LOUSTAU M.L., Dessureault, M., 1987. Etiologie du chancre godronien du Bouleau jaune. Can. J. For. Res. 16 : 360-374.

DESPREZ-LOUSTAU M.L., 1986. Physiologie in vitro des basidiospores de Melampsora pinitorqua. Conséquences pour la compréhension des infections. Eur. J. For. Pathol. 16 : 193-206.

DESPREZ-LOUSTAU M.L., 1986. Caractérisation morphologique et biologique des Melampsora spp pathogènes des pins en Europe. Eur. J. For. Pathol. 16 : 360-374.