Insight into the truffle brûlé: tripartite interactions between the black truffle (Tuber melanosporum), holm oak (Quercus ilex) and arbuscular mycorrhizal plants

Elisa Taschen , Mathieu Sauve , B. Vincent , J. Parladé , D. van Tuinen , Y. Aumeeruddy-Thomas , B. Assenat , Marc-Andre Selosse , Franck Richard

Abstract

Aim: Tuber melanosporum is an ectomycorrhizal (ECM) fungus from Mediterranean transitional ecosystems where ECM trees start to dominate among arbuscular-mycorrhizal (AM) shrubs and herbs (companion plants). Its presence entails the development of ‘brûlés’, where vegetation is scarce for unknown reasons. Current T. melanosporum production comes from plantations where management often suppresses the understory vegetation, although empirical knowledge advocates a positive role of some companion plants in truffle production. This study aimed at (i) experimentally testing the reciprocal interaction between T. melanosporum and companion plants and (ii) examining T. melanosporum-mediated soil feedback involved in the dynamics of truffle ground vegetation. Methods: A three-year experiment was set up with Quercus ilex associated with T. melanosporum (or not, as control), grown in association (or not, as control) with a companion plant. Six companion plant species were chosen based on different empirical criteria including those indicated by local truffle growers’ knowledge. A trait-based approach was applied to plants and associated fungi (abundance of T. melanosporum and AM fungi mycelium). Results-conclusion: Companion plants promoted the development of truffle mycelium. In the presence of T. melanosporum, companion plant growth and nutrition and AM fungi abundance decreased, while the nutrition status of its host increased. The truffle inhibited germination of weed seeds. These results highlight the role of T. melanosporum in mediating plant-plant interactions, possible mechanisms underlying brûlé formation and a potential successional role for T. melanosporum.
Author Elisa Taschen
Elisa Taschen,,
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, Mathieu Sauve
Mathieu Sauve,,
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, B. Vincent
B. Vincent,,
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, J. Parladé
J. Parladé,,
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, D. van Tuinen
D. van Tuinen,,
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, Y. Aumeeruddy-Thomas
Y. Aumeeruddy-Thomas,,
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, B. Assenat
B. Assenat,,
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, Marc-Andre Selosse (FB/DPTNC)
Marc-Andre Selosse,,
- Department of Plant Taxonomy and Nature Conservation
, Franck Richard
Franck Richard,,
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Journal seriesPlant and Soil, ISSN 0032-079X, e-ISSN 1573-5036, (N/A 140 pkt)
Issue year2020
Vol446
No1-2
Pages577-594
Publication size in sheets0.85
Keywords in EnglishEctomycorrhizae, endophytism, quantitative PCR, plant-soil feedback, secondary succession
ASJC Classification1110 Plant Science; 1111 Soil Science
DOIDOI:10.1007/s11104-019-04340-2
URL https://doi.org/10.1007/s11104-019-04340-2
Languageen angielski
Score (nominal)140
Score sourcejournalList
ScoreMinisterial score = 140.0, 03-03-2020, ArticleFromJournal
Publication indicators WoS Citations = 1.000; Scopus SNIP (Source Normalised Impact per Paper): 2017 = 1.435; WoS Impact Factor: 2018 = 3.259 (2) - 2018=3.761 (5)
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