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ORIGINAL RESEARCH article

Front. Microbiol.
Sec. Microbe and Virus Interactions with Plants
Volume 15 - 2024 | doi: 10.3389/fmicb.2024.1463326
This article is part of the Research Topic Mycorrhizal Symbioses: From Molecular and Functional Insights to Ecosystem Research and Application View all 4 articles

Terroir and farming practices drive arbuscular mycorrhizal fungal communities in French vineyards

Provisionally accepted
Patricia Battie-Laclau Patricia Battie-Laclau 1*Adrien Taudière Adrien Taudière 2*Mathilde Bernard Mathilde Bernard 1Lucas Bodenan Lucas Bodenan 1Myriam Duchemin Myriam Duchemin 1Yvan de Roman Yvan de Roman 1Azimê Yol Azimê Yol 1Dominique Barry-Etienne Dominique Barry-Etienne 1
  • 1 Mycea SAS, Montpellier, France
  • 2 Idest, Saint-Bonnet-de-Salendrinque, France

The final, formatted version of the article will be published soon.

    Nature-based management of vineyards is at the heart of a sustainable development for the next decades. Although much is known about grapevine benefits from Arbuscular Mycorrhizal Fungi (AMF), little is known about the influence of vineyard terroir and farming practices on AMF communities. We examined the relative effect of wine terroir and agricultural practices (organic, conversion, and conventional) on AMF abundance and diversity across 75 vineyards distributed over 14 wine terroirs in 6 wine-growing regions in France. We estimate AMF abundance by measuring spore density and root mycorrhization rates, and characterize AMF communities composition using metabarcoding by sampling both root and spore compartments for each vineyard. Organic farming slightly increases AMF abundance (spore density and mycorrhization rate). Vineyards under conversion and using organic practices display a higher AMF diversity than conventional ones. Terroirs vary widely in terms of AMF abundance and diversity, with the median of OTUs count per sample ranging from 9 (Côte des Blancs) to 35 (Gigondas). The composition of AMF communities is structured mainly by terroir and in a lesser extent by practice. The effect of terroir on AMF communities is partially explained by distance decay and soil properties, but the majority of variation is still explained only by the terroir identity. Organic practices improve both abundance and diversity of AMF in vineyards, possibly leading to more productivity and resilience of grapevines. This large-scale study highlights the importance of terroir in our understanding of vineyard microbiome and paves the way to incorporation of AMF in microbial terroir studies and applications.

    Keywords: Symbiosis, microbiome, arbuscular mycorrhizal fungi, community ecology, Wine, Organic farming, terroir

    Received: 11 Jul 2024; Accepted: 20 Dec 2024.

    Copyright: © 2024 Battie-Laclau, Taudière, Bernard, Bodenan, Duchemin, de Roman, Yol and Barry-Etienne. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence:
    Patricia Battie-Laclau, Mycea SAS, Montpellier, France
    Adrien Taudière, Idest, Saint-Bonnet-de-Salendrinque, France

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