JAKUSCHKIN, Boris; FIEVET, Virgil; SCHWALLER, Loïc; FORT, Thomas; ROBIN, Cécile; VACHER, Corinne

doi:10.1007/s00248-016-0777-x

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JAKUSCHKIN, Boris
Biodiversité, Gènes & Communautés [BioGeCo]

FIEVET, Virgil
Biodiversité, Gènes & Communautés [BioGeCo]

SCHWALLER, Loïc
Mathématiques et Informatique Appliquées [MIA-Paris]

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Ce document a été publié dans

Microbial ecology. 2016, vol. 72, n° 4, p. 870-880

Springer Verlag

Résumé en anglais

Plant-inhabiting microorganisms interact directly with each other, forming complex microbial interaction networks. These interactions can either prevent or facilitate the establishment of new microbial species, such as a pathogen infecting the plant. Here, our aim was to identify the most likely interactions between Erysiphe alphitoides, the causal agent of oak powdery mildew, and other foliar microorganisms of pedunculate oak (Quercus robur L.). We combined metabarcoding techniques and a Bayesian method of network inference to decipher these interactions. Our results indicate that infection with E. alphitoides is accompanied by significant changes in the composition of the foliar fungal and bacterial communities. They also highlight 13 fungal operational taxonomic units (OTUs) and 13 bacterial OTUs likely to interact directly with E. alphitoides. Half of these OTUs, including the fungal endophytes Mycosphaerella punctiformis and Monochaetia kansensis, could be antagonists of E. alphitoides according to the inferred microbial network. Further studies will be required to validate these potential interactions experimentally. Overall, we showed that a combination of metabarcoding and network inference, by highlighting potential antagonists of pathogen species, could potentially improve the biological control of plant diseases.< Réduire

Mots clés

microbiote

communauté fongique

interaction plante pathogène

oïdium du chêne

erysiphe

quercus

taxonomie

Mots clés en anglais

plant microbiota

plant-pathogen interaction

pathobiome

microbial network

network inference

disease resistance

biocontrol

powdery mildew

plant pathogen interaction

taxonomy