Isabelle D. Mazet
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View article: Digital droplet PCR quantification and field-scale spatial distribution of <i>Plasmopara viticola</i> oospores in vineyard soil
Digital droplet PCR quantification and field-scale spatial distribution of <i>Plasmopara viticola</i> oospores in vineyard soil Open
Grapevine downy mildew, caused by the oomycete Plasmopara viticola , is one of the most devastating diseases affecting grapevine worldwide. Primary inoculum (i.e., oospores) plays a decisive role in downy mildew epidemics, but we still kno…
View article: A multivirulent <i>Plasmopara viticola</i> strain from Cilaos on Réunion Island breaks down <i>Rpv1, Rpv3.1 and Rpv10</i> mediated resistance of grapevine
A multivirulent <i>Plasmopara viticola</i> strain from Cilaos on Réunion Island breaks down <i>Rpv1, Rpv3.1 and Rpv10</i> mediated resistance of grapevine Open
Grapevine downy mildew, caused by Plasmopara viticola , is one of the most destructive diseases in viticulture. Resistance-based management strategies rely on grapevine varieties carrying major resistance loci ( Rpv ). Although breakdown o…
View article: Multiple geographic breakdown events of the <i>Rpv1</i>–<i>Rpv3.1</i> pyramided resistance in grapevine by <i>Plasmopara viticola</i>
Multiple geographic breakdown events of the <i>Rpv1</i>–<i>Rpv3.1</i> pyramided resistance in grapevine by <i>Plasmopara viticola</i> Open
In 2024, three vineyard sites located within a radius of 40 km in southeastern France, each planted with Artaban, a grapevine variety carrying pyramided resistance ( Rpv1 and Rpv3.1 ), exhibited severe downy mildew symptoms following clima…
View article: Parallel adaptation and admixture drive the evolution of virulence in the grapevine downy mildew pathogen
Parallel adaptation and admixture drive the evolution of virulence in the grapevine downy mildew pathogen Open
Plasmopara viticola is a biotrophic oomycete responsible for grapevine downy mildew, one of the most destructive diseases in viticulture. Breeding for resistant varieties relies on the introgression of partial resistance factors from wild …
View article: GiESCO 2025 – Book of Abstracts
GiESCO 2025 – Book of Abstracts Open
International audience
View article: Recombination landscape and karyotypic variations revealed by linkage mapping in the grapevine downy mildew pathogen <i>Plasmopara viticola</i>
Recombination landscape and karyotypic variations revealed by linkage mapping in the grapevine downy mildew pathogen <i>Plasmopara viticola</i> Open
Plasmopara viticola, the causal agent of grapevine downy mildew, is a biotrophic oomycete engaged in a tight coevolutionary relationship with its host. Rapid adaptation of the pathogen is favored by annual sexual reproduction that generate…
View article: Multiple deletions of candidate effector genes lead to the breakdown of partial grapevine resistance to downy mildew
Multiple deletions of candidate effector genes lead to the breakdown of partial grapevine resistance to downy mildew Open
Summary Grapevine downy mildew, caused by the oomycete Plasmopara viticola ( P. viticola , Berk. & M. A. Curtis; Berl. & De Toni), is a global threat to Eurasian wine grapes Vitis vinifera . Although resistant grapevine varieties are becom…
View article: An effector deletion leads to the breakdown of partial grapevine resistance to downy mildew
An effector deletion leads to the breakdown of partial grapevine resistance to downy mildew Open
Grapevine downy mildew, caused by the oomycete Plasmopara viticola , is a globally destructive disease that particularly affect the Eurasian wine grape V. vinifera . While genetically resistant varieties are becoming more accessible, popul…
View article: The Characterization of Pathotypes in Grapevine Downy Mildew Provides Insights into the Breakdown of Rpv3, Rpv10, and Rpv12 Factors in Grapevines
The Characterization of Pathotypes in Grapevine Downy Mildew Provides Insights into the Breakdown of Rpv3, Rpv10, and Rpv12 Factors in Grapevines Open
We describe a standard method for characterizing the virulence profile of Plasmopara viticola, the causal agent of grapevine downy mildew. We used 33 European strains to inoculate six grapevine varieties carrying the principal factors for …
View article: Identifying the genetic architecture of <i>Plamopara viticola</i> traits of interest by genome-wide association studies: case study of mating-type locus and effectors genes involved in the breakdown of grapevine Rpv3 resistance
Identifying the genetic architecture of <i>Plamopara viticola</i> traits of interest by genome-wide association studies: case study of mating-type locus and effectors genes involved in the breakdown of grapevine Rpv3 resistance Open
International audience
View article: Four years of monitoring of disease-resistant grapevine varieties in French vineyards
Four years of monitoring of disease-resistant grapevine varieties in French vineyards Open
International audience
View article: Crossing <i>Plasmopara viticola</i> strains in controlled conditions to uncover the genomic bases of downy mildew resistance breakdown in grapevine
Crossing <i>Plasmopara viticola</i> strains in controlled conditions to uncover the genomic bases of downy mildew resistance breakdown in grapevine Open
The biotrophic oomycete Plasmopara viticola is the causal agent of downy mildew, one of the major grapevine diseases. We report here a successful strategy to cross compatible strains of this pathogen and obtain a large viable progeny. We u…
View article: Identification of the First Oomycete Mating-type Locus Sequence in the Grapevine Downy Mildew Pathogen, Plasmopara viticola
Identification of the First Oomycete Mating-type Locus Sequence in the Grapevine Downy Mildew Pathogen, Plasmopara viticola Open
View article: Gestion durable des résistances en viticultureDétecter l’apparition de contournements, l’émergence de nouvelles problématiques sanitaires et adapter les systèmes de cultures.
Gestion durable des résistances en viticultureDétecter l’apparition de contournements, l’émergence de nouvelles problématiques sanitaires et adapter les systèmes de cultures. Open
The cultivation of disease-resistant grapevine varieties to reduce the number of pesticide treatments is a hopeful innovation that opens new perspectives in viticulture. Various breeding programs in France and Europe led to the classificat…
View article: Identification of the first oomycete mating-type locus sequence in the grapevine downy mildew pathogen,<i>Plasmopara viticola</i>
Identification of the first oomycete mating-type locus sequence in the grapevine downy mildew pathogen,<i>Plasmopara viticola</i> Open
Mating types are self-incompatibility systems that promote outcrossing in plants, fungi and oomycetes. Mating-type genes have been widely studied in plants and fungi, but have yet to be identified in oomycetes, eukaryotic organisms closely…
View article: A High-Quality Grapevine Downy Mildew Genome Assembly Reveals Rapidly Evolving and Lineage-Specific Putative Host Adaptation Genes
A High-Quality Grapevine Downy Mildew Genome Assembly Reveals Rapidly Evolving and Lineage-Specific Putative Host Adaptation Genes Open
Downy mildews are obligate biotrophic oomycete pathogens that cause devastating plant diseases on economically important crops. Plasmopara viticola is the causal agent of grapevine downy mildew, a major disease in vineyards worldwide. We s…
View article: A high-quality grapevine downy mildew genome assembly reveals rapidly evolving and lineage-specific putative host adaptation genes
A high-quality grapevine downy mildew genome assembly reveals rapidly evolving and lineage-specific putative host adaptation genes Open
Downy mildews are obligate biotrophic oomycete pathogens that cause devastating plant diseases on economically important crops. Plasmopara viticola is the causal agent of grapevine downy mildew, a major disease in vineyards worldwide. We s…
View article: Draft Genome Sequence of <i>Plasmopara viticola</i> , the Grapevine Downy Mildew Pathogen
Draft Genome Sequence of <i>Plasmopara viticola</i> , the Grapevine Downy Mildew Pathogen Open
Plasmopara viticola is a biotrophic pathogenic oomycete responsible for grapevine downy mildew. We present here the first draft of the P. viticola genome. Analysis of this sequence will help in understanding plant-pathogen interactions in …
View article: Adaptation of a plant pathogen to partial host resistance: selection for greater aggressiveness in grapevine downy mildew
Adaptation of a plant pathogen to partial host resistance: selection for greater aggressiveness in grapevine downy mildew Open
An understanding of the evolution of pathogen quantitative traits in response to host selective pressures is essential for the development of durable management strategies for resistant crops. However, we still lack experimental data on th…