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This work was supported by the bilateral Project funded by the Swiss Federal Institute for Forest, Snow and Landscape Research WSL & the Forest Science and Technology Centre of Catalonia (CTFC): BLACK-DYNAMite-DYNAMics and competition of BLACK Perigord and Burgundy truffles (T. melanosporum and T. aestivum) under climate change This research was also supported by the European Union via INTACT, Project number 101007623, entitled " Innovation in truffle cultivation, preservation, processing and wild truffle resources management " under " Horizon 2020 - the Framework Programme for Research and Innovation (2014 - 2020). " Y.P. thanks the University of Lleida for her contract (UdL-Impuls). J.G.A. was supported by the Ramon y Cajal fellowship (RYC-2016-20528)

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Habitat is more important than climate for structuring soil fungal communities associated in truffle sites

Publicated to:Fungal Biology. 128 (2): 1724-1734 - 2024-03-13 128(2), DOI: 10.1016/j.funbio.2024.02.006

Authors: Pinuela, Yasmin; Alday, Josu G; Oliach, Daniel; Castano, Carles; Buntgen, Ulf; Egli, Simon; Pena, Fernando Martinez; Dashevskaya, Svetlana; Colinas, Carlos; Peter, Martina; Bonet, Jose Antonio

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Abstract

The ectomycorrhizal fungi Tuber melanosporum Vittad. and Tuber aestivum Vittad. produce highly valuable truffles, but little is known about the soil fungal communities associated with these truffle species in places where they co-occur. Here, we compared soil fungal communities present in wild and planted truffle sites, in which T. melanosporum and T. aestivum coexist, in Mediterranean and temperate regions over three sampling seasons spanning from 2018 to 2019. We showed that soil fungal community composition and ectomycorrhizal species composition are driven by habitat type rather than climate regions. Also, we observed the influence of soil pH, organic matter content and C:N ratio structuring total and ectomycorrhizal fungal assemblages. Soil fungal communities in wild sites revealed more compositional variability than those of plantations. Greater soil fungal diversity was found in temperate compared to Mediterranean sites when considering all fungal guilds. Ectomycorrhizal diversity was significantly higher in wild sites compared to plantations. Greater mould abundance at wild sites than those on plantation was observed while tree species and seasonal effects were not significant predictors in fungal community structure. Our results suggested a strong influence of both ecosystem age and management on the fungal taxa composition in truffle habitats.

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