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Garcia-Barreda, SergiAuthorSanchez, SergioAuthorMarco, PedroAuthor

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April 3, 2026
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Mycorrhizal competition release and microbial dynamics in native and non-native Tuber melanosporum habitats

Publicated to: APPLIED AND ENVIRONMENTAL MICROBIOLOGY. - 2026-04-03, DOI: 10.1128/aem.00225-26

Authors:

Benucci, G. M. N., Garcia-Barreda, S., Sanchez, S., Marco, P., De Miguel, A. M., Le Tacon, F., Marozzi, G., Baciarelli Failini, L., Eslick, H., Elliott, T. F., Deveau, A., Murat, C., Donnini, D., & Bonito, G.
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Affiliations

Arbor Carbon, Murdoch University - Author
Departamento de Ciencia Vegetal, Centro de Investigación y Tecnología Agroalimentaria de Aragón (CITA) - Author
Departamento de Ciencia Vegetal, Centro de Investigación y Tecnología Agroalimentaria de Aragón (CITA), Instituto Agroalimentario de Aragón – IA2 (CITA-Universidad de Zaragoza) - Author
Department of Agricultural, Food and Environmental Sciences, University of Perugia - Author
Department of Plant, Soil, and Microbial Sciences, Michigan State University - Author
Ecosystem Management, School of Environmental and Rural Science, University of New England - Author
Facultad de Ciencias Departamento de Biología Ambiental, Universidad de Navarra - Author
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement (INRAE) Centre Grand Est Nancy - Author
Université de Lorraine, INRAE, IAM - Author
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Abstract

Truffles in the genus Tuber (Pezizales) are among the few ectomycorrhizal taxa successfully cultivated worldwide. Australia has recently become one of the top producers of Tuber melanosporum, a high-valued black truffle native to Europe. Truffle co-introductions in the Southern Hemisphere with their Northern Hemisphere plant symbionts are hypothesized to benefit from reduced ectomycorrhizal competition and natural enemies. In this study, we tested whether T. melanosporum in Australia experiences competition release by sampling soils and truffles across France, Spain, Italy, and Australia. Fungal and prokaryotic communities in truffle plantations were assessed in native (European) and non-native (Australian) habitats through ITS and 16S rDNA amplicon sequencing from soil and truffles. Community composition was primarily structured by site of origin and secondarily by presence of brûlé, vegetation-free area induced by truffle production of plant-growth inhibiting compounds, with significant interactions indicating site-dependent brûlé effects. European soils showed higher fungal richness outside the brûlé, with higher evenness overall and for ectomycorrhizal fungi only outside brûlé. T. melanosporum showed higher abundance in Australia, with significant differences restricted to outside the brûlé. Overall, ectomycorrhizal fungi in European soils had more than four times the taxa and higher diversity compared to Australian soils. Among the main competitors, Tomentella, Inocybe, and Trichophaea co-dominated in Europe, versus Scleroderma, Hebeloma, and Tarzetta in Australia. Despite differences in soil microbiomes, bacterial communities within T. melanosporum truffle ascocarps were strikingly similar across sites and continents and were dominated by Bradyrhizobium. Despite high site-level variation, our results support the competition release hypothesis, with reduced enemies benefiting T. melanosporum colonization outside the brûlé in Australia.
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Keywords

Competencia biológicaEctomicorrizasMicrobiomasMicroorganismos del sueloSecuenciación de alto rendimientoTuber melanosporum

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal APPLIED AND ENVIRONMENTAL MICROBIOLOGY due to its progression and the good impact it has achieved in recent years, according to the agency Scopus (SJR), it has become a reference in its field. In the year of publication of the work, 2026, it was in position , thus managing to position itself as a Q1 (Primer Cuartil), in the category Food Science. Notably, the journal is positioned above the 90th percentile.

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Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2026-11-15:

  • The use, from an academic perspective evidenced by the Altmetric agency indicator referring to aggregations made by the personal bibliographic manager Mendeley, gives us a total of: 5.
  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 5 (PlumX).

With a more dissemination-oriented intent and targeting more general audiences, we can observe other more global scores such as:

  • The Total Score from Altmetric: 79.
  • The number of mentions on the social network X (formerly Twitter): 2 (Altmetric).
  • The number of mentions in news outlets: 7 (Altmetric).

It is essential to present evidence supporting full alignment with institutional principles and guidelines on Open Science and the Conservation and Dissemination of Intellectual Heritage. A clear example of this is:

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Leadership analysis of institutional authors

This work has been carried out with international collaboration, specifically with researchers from: Australia; European Union.

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Awards linked to the item

G.B. and G.M.N.B. acknowledge support from NSF grant DEB-1946445 (NSF), DEB 1737898, a Science Focus Area grant from the US Department of Energy Biological System Science Division under grant number LANLF59T, and Michigan State University AgBioResearch NIFA project MICL02416. C.M. was supported by UMR 1136 financed by the French National Research Agency (ANR) as part of the “Investissements d’Avenir” program (ANR-11-LABX-0002-01, Lab of Excellence ARBRE).
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