Temporal changes of bacterial communities in the Tuber melanosporum ectomycorrhizosphere during ascocarp development

Mycorrhiza
Aurélie DeveauStéphane Uroz

Abstract

Ectomycorrhizae create a multitrophic ecosystem formed by the association between tree roots, mycelium of the ectomycorrhizal fungus, and a complex microbiome. Despite their importance in the host tree's physiology and in the functioning of the ectomycorrhizal symbiosis, detailed studies on ectomycorrhiza-associated bacterial community composition and their temporal dynamics are rare. Our objective was to investigate the composition and dynamics of Tuber melanosporum ectomycorrhiza-associated bacterial communities from summer to winter seasons in a Corylus avellana tree plantation. We used 16S ribosomal RNA (rRNA)-based pyrosequencing to compare the bacterial community structure and the richness in T. melanosporum's ectomycorrhizae with those of the bulk soil. The T. melanosporum ectomycorrhizae harbored distinct bacterial communities from those of the bulk soil, with an enrichment in Alpha- and Gamma-proteobacteria. In contrast to the bacterial communities of truffle ascocarps that vastly varies in composition and richness during the maturation of the fruiting body and to those from the bulk soil, T. melanosporum ectomycorrhiza-associated bacterial community composition stayed rather stable from September to January. Our resul...Continue Reading

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Citations

Mar 29, 2018·Microbiome·M Amine HassaniStéphane Hacquard
Feb 23, 2018·FEMS Microbiology Reviews·Aurélie DeveauLukas Y Wick
Jul 31, 2019·Environmental Microbiology·Jaime Carrasco, Gail M Preston
Jan 1, 2018·Mycorrhiza·Catherine A Gehring, Nancy C Johnson
Nov 30, 2019·Scientific Reports·Khalid El KarkouriDidier Raoult

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