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24, chemin de Borde Rouge -Auzeville - CS52627 31326 Castanet Tolosan cedex - France

Last update: May 2021

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Pierre-Antoine NOCETO (15/11/2021)

Pierre-Antoine NOCETO (15/11/2021)
Study of the impact of viticultural practices on arbuscular mycorrhizal fungi associated withgrapevine


Arbuscular mycorrhiza, a mutualistic symbiosis established between plants and arbuscular mycorrhizal fungi (AMF), provides many ecosystem services such as improved soil structure, increased plant growth and nutrition, and improved tolerance to biotic and abiotic stresses. However, intensive agricultural practices and the use of phytosanitary products as for example herbicide and fungicides, have a strong impact on communities of soil microorganisms, including arbuscular mycorrhizal fungi, as well as on biological mechanisms within the ecosystem. This thesis wotk is part of the European Biovine project supported by the European Commission through the CORE Organic Cofund. The aim of this research work was to determine the influence of plant diversity, within a cover, on the structure of arbuscular mycorrhizal fungi communities associated with grapevine, but also on the biological functioning of the soil (microbial enzymatic activities). Our research also led us to study the effect of the genetic variability of grapevine in the structuring of arbuscular mycorrhizal fungi communities. On this point, an effect of rootstock and grape variety on the composition of the arbuscular mycorrhizal fungi community was shown. However, this did not modify the Shannon diversity indices. The influence of grapevine age on the organisation of arbuscular mycorrhizal fungi communities was also studied. In a Champagne vineyard, we communities between a recently planted vineyard and old grapevines, suggesting a role for grapevine vigour, carbon allocation on  the recruitment of arbuscular mycorrhizal fungi communities.


Pr. COUTOS-THEVENOT Pierre Professeur des universités, Université de Poitiers Rapporteur
Dr. LAUVERGEAT Virginie Maître de conférence, Université de Bordeaux Rapporteure
Pr. JEANDROZ Sylvain Professeur des universités, AgroSup Dijon Examinateur
Dr. CLEMENT Mathilde Responsable Recherche et Développement, MycoPhyto Examinatrice
Pr. WIPF Daniel Professeur des universités, Université de Bourgogne Directeur de thèse