Benoit Marçais


Benoit Marçais, Directeur de recherche
(00) 383 39 40 53


Research thematics:

My interest is in epidemiology of fungal diseases affecting trees in forests and natural ecosystems. recent work has been focused on determining the causes of forest disease emergence in relation with global change, in particular recent evolution in climate and invasion. The main pathosystems have been studying are Phytophthora xalni, Phytophthora ramorum, ash dieback (Chalara fraxinea), oak powdery mildew, Dothistroma needle blight and Diplodia shoot blight of pines.

Recent articles:

Grosdidier M., Ioos R., Husson C., Cael O., Scordia T., Marçais B. (2018). Tracking the invasion: dispersal of Hymenoscyphus fraxineus airborne inoculum at different scales. FEMS Microbiology Ecology (in press)

Grosdidier M, Ioos R, Marçais B. (2018). Do higher summer temperatures restrict the dissemination of Hymenoscyphus fraxineus in France ? Forest Pathology, e12426.

Grosdidier M., Aguayo J., Marçais B., Ioos R. (2017). Detection of plant pathogens using real-time PCR: How reliable are late Ct values? Plant Pathology, 66: 359-367. DOI: 10.1111/ppa.12591

Marçais M., Piou D., Dezette D., Desprez-Loustau M.L. (2017) Can oak powdery mildew severity be explained by indirect effects of climate on the composition of the Erysiphe pathogenic complex? Phytopathology,107(5):570-579. doi:

Marçais B, Husson C, Caël O, Collet C., Dowkiw A., Saintonge F-X., Delahaye L., Collet C, Chandelier A. (2017). Estimation of Ash mortality induced by Hymenoscyphus fraxineus in France and Belgium, Baltic Forestry 23(1): 159-167.

Desprez-Loustau ML, Aguayo J, Dutech C, Hayden JK, Husson C, Jakushkin B, Marçais B, Piou D, Robin C, Vacher C (2016). An evolutionary ecology perspective to address forest pathology challenges of today and tomorrow. Annals Forest Science, 73: 45–67. DOI 10.1007/s13595-015-0487-4

Chandelier A., Husson C., Druart P., Marçais B. (2016). Assessment of inoculation methods for screening black alder resistance to Phytophthora ×alni. Plant Pathology, 65: 441–450. Doi: 10.1111/ppa.12418

Hamelin F.M., Castella F., Doli, V., Marçais B., Ravigné V., Lewis M.A. (2016). Mate finding, sexual spore production, and the spread of fungal plant parasites. Bulletin of Mathematical Biology. 78: 695-712.

Muñoz F., Marçais B., Dufour J., Dowkiw A. (2016). Rising out of the ashes: additive genetic variation for susceptibility to Hymenoscyphus fraxineus in Fraxinus excelsior. Phytopathology 106: 1535:1543, DOI 10.1094/PHYTO-11-15-0284-R

Marçais B, Husson C, Godart L, Caël O (2016). Influence of site and stand factors on Hymenoscyphus fraxineus induced basal lesions. Plant Pathology 65: 1452–1461, DOI 10.1111/ppa.12542.

Aguayo J, Halkett F, Husson C, Nagy ZÁ, Szigethy A, Bakonyi J, Frey P, Marçais B. (2016). Genetic diversity and origins of the homoploid-type hybrid Phytophthora xalni. Appl Environ Microbiol 82: 7142-7153. doi:10.1128/AEM.02221-16.

Husson C., Aguayo J., Revellin C., Frey P., Ioos R., Marçais. B. (2015). Evidence for Homoploid Speciation in Phytophthora alni Supports Taxonomic Reclassification in This Species Complex. Fungal Genetics and Biology 77: 12–21. doi:10.1016/j.fgb.2015.02.013

Rincón A, Santamaría-Pérez B, Rabasa SG, Coince A, Marçais B, Buée M (2015). Compartmentalized and contrasted response of ectomycorrhizal and soil fungal communities of Scots pine forests along elevation gradients in France and Spain. Environmental Microbiology, 17: 3009-24. doi: 10.1111/1462-2920.12894

Labbé F, Marcais B, Dupouey JL, Bélouard T, Capdevielle X, Piou D, Robin C, Dutech C (2015). Pre-existing forests as sources of pathogens? The emergence of Armillaria ostoyae in a recently planted pine forest. Forest Ecology and Management. 357: 248–258.

Le Tacon F., Marçais B., Courvoisier M., Murat C., Montpied P., Becker M. (2014). Climatic variations explain annual fluctuations in French Périgord black truffle wholesale markets but do not explain the decrease in black truffle production over the last 48 years. Mycorrhiza, 24 (S1): 115-125

Aguayo J., Elegbede F., Husson C., Saintonge F.X. Marçais B. (2014). Modeling climate impact on an emerging disease, the Phytophthora alni induced alder decline. Global Change Biology, 20: 3209-3221

Coince A., Cordier T., Lengellé J., Defossez E., Vacher C., Robin C., Buée M., Marçais B. (2014). Leaf and root-associated fungal assemblages do not follow similar elevational diversity patterns. PLOS ONE 9(6): e100668

Santini A., Ghelardini L., De Pace C., Desprez-Loustau M.L., Capretti P., Chandelier A., Cech T., Chira D., Diamandis S., Gaitniekis T., Hantula J., Holdenrieder O., Jankovsky L., Jung T., Jurc D., Kirisits T., Kunca A., Lygis V., Malecka M., Marcais B., Schmitz S., Schumacher J.,  Solheim H., Solla A., Szabò I., Tsopelas P., Vannini A., Vettraino A.M., Woodward S., Webber J., Stenlid J. (2013). Biogeographic patterns and determinants of invasion by forest pathogens in Europe. New Phytologist, 197: 238-250

Aguayo J., Adams G.C.,  Halkett F., Catal M., Husson C., Nagy Z.A., Hansen E.M., Frey P. and Marçais B. (2013). Strong genetic differentiation between American and European populations of Phytophthora alni subsp. uniformis. Phytopathology, 103:190-199

Marçais B., Loustau M.L. (2013). European oak powdery mildew: impact on trees, effects of environmental factors and potential effects of climate change. Ann. For. Sci. 61: 889–895

Coince A., Caël O., Bach C., Lengellé J., Cruaud C., Gavory F., Morin E., Murat C., Marçais B., Buée M. (2013). Below-ground fine-scale distribution and soil versus fine-root location of fungal and soil oomycete communities in a French beech forest. Fungal Ecology, 6: 223-235

Husson C., Caël O., Grandjean J.P., Nageleisen L. Marçais B. (2012). Occurrence of Hymenoscyphus pseudoalbidus on infected ash logs. Plant Pathol, DOI: 10.1111/j.1365-3059.2011.02578.x

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

Fabre B., Ioos R., Piou D., Marçais B. (2012). Is emergence of pine Dothistroma needle blight in France caused by the cryptic species Dothistroma pini? Phytopathology, 102 : 47-54

Husson C., Scala B., Caël O., Frey P., Feau N. and Marçais B. (2011). Chalara fraxinea is an invasive pathogen in France. European Journal of Plant Pathology, 130: 311-324

Fabre B., Piou D., Desprez-Loustau M.L. and Marçais B. (2011). Can the emergence of pine Sphaeropsis shoot blight in France be explained by changes in pathogen pressure linked to climate change? Global Change Biology, 17: 3218–3227

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

Marçais B., Caël O. and Delatour C. (2011). Interaction between root rot basidiomycetes and Phytophthora species on pedunculate oak. Plant Pathology, 60 : 296–303

Defossez E., Courbaud B., Marcais B., Thuiller W., Kunstler G.. (2011). Do interactions between plant and soil biota change with elevation? A study on Fagus sylvatica. Biology Letters, 7: 699-701

Buée M., Maurice J.P., Zeller B., Andrianarisoa S., RangerJ., Courtecuisse R., Marçais B. and Le Tacon F. (2011). Influence of tree species on richness and diversity of epigeous fungal communities in a French temperate forest stand. Fungal Ecology 4: 22-31.

Courty, P.E., Labbe J., Kohler A., Marcais B., Bastien C., Churin J.L., Garbaye J. and Le Tacon F. (2011). Effect of poplar genotypes on mycorrhizal infection and secreted enzyme activities in mycorrhizal and non-mycorrhizal roots. Journal of Experimental Botany 62: 249-260

Labbé J., Jorge V., Kohler A., Vion P., Marçais B.,  Bastien B., Tuskan G.A., Martin F., Le Tacon F. (2011) Identification of quantitative trait loci affecting ectomycorrhizal symbiosis in an interspecific F1 poplar cross and differential expression of genes in ectomycorrhizas of the two parents: Populus deltoides and Populus trichocarpa. Tree Genetics & Genomes, 7: 617-627

Desprez-Loustau M.L., Vitasse Y., Delzon S., Capdevielle X., Marçais B. and 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. Journal of Evolutionary Biology, 23: 87-97

Martin F., Kohler A., Murat C., Balestrini R., CoutinhoP.M., Jaillon O., Montanini B., Morin E., Noel B., PercudaniR., Porcel B., Rubini A., Amicucci A., Amselem J., Anthouard V., Arcioni S., Artiguenave F., Aury J.M., Ballario P., Bolchi A., Brenna A., Brun A., Buée M., Cantarel B., Chevalier G., Couloux A., Da Silva C., Denoeud F., Duplessis S., Ghignone S., Hilselberger B., Lotti M., Marçais B., Mello A., Miranda M., Pacioni G., Quesneville H., Riccioni C., Ruotolo R., Splivallo R., Stocchi V., Tisserant T., Viscomi A.R., Zambonelli A., Zampieri E., Henrissat B., Lebrun M.H., Paolocci F., Bonfante P., Ottonello S. and Wincke P. (2010). Perigord black truffle genome uncovers evolutionary origins and mechanisms of symbiosis. Nature 464 (7291): 1033-1038

Elegbede C.F., PierratJ.C., Aguayo J., Husson C., Halkett F. and Marçais B. (2010). A statistical model to detect asymptomatic infectious individual with an application in the Phytophthora alni induced alder decline. Phytopathology 100:1262-269.

Hajji, M., Dreyer, M.and Marçais, B. (2009). Impact of Erysiphe alphitoides on transpiration and photosynthesis in Quercus robur leaves. Eur. J. Plant Path. 125: 63-72

Marçais, B., Kavkova, M. and Desprez-Loustau, M.L. (2009). Phenotypic variation in the phenology of ascospore production between European populations of oak powdery mildew. Ann. F. Sci. 66: 814-822

Ioos R., Favre B., Saurat C., Frey P. and Marçais  B. (2009). Development, comparison, and validation of real-time and conventional PCR tools for the detection of the fungal pathogens causing brown spot and red band needle blights of pines. Phytopathology 100: 105:114

Thoirain, B., Husson, C., Marçais, B. (2007). Risk factors for the the Phytophthora-induced decline of alder in northeastern France. Phytopathology, 97: 99-105

Desprez-Loustau, M.L., Robin, C., Renaud, G., Déqué, M., Badeau, V., Piou, D., Husson, C. and 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: 101-120

Husson, C., Delatour, C., Frey, P., Marçais, B., Saurat, C. and Schenck, N. (2007). First report of Phytophthora ramorum on Ornamental Plants in France. Plant disease, 91: 1359-1359

Marçais, B., Caël O. (2006) Spatial pattern of the density of Armillaria epiphytic rhizomorphs on tree collar in an oak stand For. Path., 36: 32-40

Marçais, B., Bréda, N. (2006). Role of an opportunistic pathogen in the decline of stressed oak trees. Journal of Ecology 94: 1214-1223

Ioos, R., Andrieux, A., Marçais, B., Frey, P. (2006). Genetic characterization of the natural hybrid species Phytophthora alni as inferred from nuclear and mitochondrial DNA analyses. Fungal Genetics and Biology, 43: 511-529

Desprez-Loustau, M.L., Marçais, B., Nageleisen, L.M., Piou, D., Vannini, A. (2006). Interactive effects of drought and pathogens on forest trees. Ann. For. Sci. 63: 597-612