Journal
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
Volume 81, Issue 20, Pages 6946-6952Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/AEM.01098-15
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Funding
- LOEWE research funding program of the government of Hessen
- German Research Foundation/Deutsche Forschungsgemeinschaft (DFG) [1191/4-1]
- French National Research Agency (ANR) as part of the Investissements d'Avenir program [ANR-11-LABX-0002-01]
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Truffles (Tuber spp.) are ascomycete subterraneous fungi that form ectomycorrhizas in a symbiotic relationship with plant roots. Their fruiting bodies are appreciated for their distinctive aroma, which might be partially derived from microbes. Indeed, truffle fruiting bodies are colonized by a diverse microbial community made up of bacteria, yeasts, guest filamentous fungi, and viruses. The aim of this minireview is two-fold. First, the current knowledge on the microbial community composition of truffles has been synthesized to highlight similarities and differences among four truffle (Tuber) species (T. magnatum, T. melanosporum, T. aestivum, and T. borchii) at various stages of their life cycle. Second, the potential role of the microbiome in truffle aroma formation has been addressed for the same four species. Our results suggest that on one hand, odorants, which are common to many truffle species, might be of mixed truffle and microbial origin, while on the other hand, less common odorants might be derived from microbes only. They also highlight that bacteria, the dominant group in the microbiome of the truffle, might also be the most important contributors to truffle aroma not only in T. borchii, as already demonstrated, but also in T. magnatum, T. aestivum, and T. melanosporum.
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