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Publications (94)
The French ANR project "Data to Knowledge in Agronomy and Biodiversity" (D2KAB) builds an archive of French agricultural alert newsletters. In order to annotate plant disease and pest, we need a new semantic resource. Several ontologies and knowledge graphs already exist on the subject but do not cover all of our needs. We have therefore developed...
Botryosphaeria dieback is a grapevine trunk disease caused by fungi of the Botryosphaeriaceae family, which attacks more specifically the woody tissues. The infection leads to different symptoms including a severe form with a leaf drop as well as premature plant death. Botryosphaeria dieback causes major economic losses, since no effective treatmen...
Quantifying healthy and degraded inner tissues in plants is of great interest in agronomy, for example, to assess plant health and quality and monitor physiological traits or diseases. However, detecting functional and degraded plant tissues in-vivo without harming the plant is extremely challenging. New solutions are needed in ligneous and perenni...
In the past, most grapevine trunk diseases (GTDs) have been controlled by treatments with sodium arsenite. For obvious reasons, sodium arsenite was banned in vineyards, and consequently, the management of GTDs is difficult due to the lack of methods with similar effectiveness. Sodium arsenite is known to have a fungicide effect and to affect the le...
(1) Background: Grapevine trunk diseases (GTDs) have become a global threat to vineyards worldwide. These diseases share three main common features. First, they are caused by multiple pathogenic micro-organisms. Second, these pathogens often maintain a long latent phase, which makes any research in pathology and symptomatology challenging. Third, a...
Les champignons de la famille des botryosphaeriacées sont responsables d’une des plus graves affections de la vigne : la botryosphaeriose. Cette maladie s’est développée ces vingt dernières années à la suite de l’arrêt des traitements arsénicaux et du changement climatique. L’augmentation des températures prévue pour ces trente prochaines années ri...
Worldwide, vineyards sustainability is threatened by grapevine ( Vitis vinifera L.) trunk diseases (GTD), which spread insidiously, irreversibly degrading internal trunk tissues and ultimately entailing vine death. Foliar symptoms can erratically appear, but the sanitary status of vines cannot be ascertained without injuring the plants. To tackle t...
Grapevine virus L (GVL) is a recently described vitivirus (family Betaflexiviridae) with a positive-sense single-stranded RNA genome. It has so far been reported from China, Croatia, New-Zealand, the United States and Tunisia (Debat et al. 2019; Diaz-Lara et al. 2019; Alabi et al. 2020; Ben Amar et al. 2020). It has significant genetic variability...
Although sodium arsenite was widely used in Europe until its ban in 2003, its effects on microorganisms is not clearly understood. To improve our understanding of sodium arsenite curative effect on GTDs, grapevines displaying esca-foliar symptoms from different French regions (Alsace, Champagne, Languedoc) were treated or not with sodium arsenite,...
Le concept d’organisme pluricellulaire, qui décrit un être vivant comme un ensemble ordonné, composé de cellules assemblées en organes, montre actuellement ses limites. En effet, un organisme ne vit pas seul, mais associé plus ou moins intimement, à des communautés microbiennes qui vont interagir avec lui et moduler ses propriétés (physiologiques e...
The economic impact of grapevine trunk diseases (GTDs) is increasing worldwide, due to the lack of efficient and simple control protocols for these disease complexes. Possible and efficient GTD management strategies must consider the complexity of host physiological alterations affecting metabolism and defense responses determined by GTD pathogens,...
Main conclusion
Heat and water stresses, individually or combined, affect both the plant (development, physiology, and production) and the pathogens (growth, morphology, dissemination, distribution, and virulence). The grapevine response to combined abiotic and biotic stresses is complex and cannot be inferred from the response to each single stres...
Vitis vinifera is affected by many diseases every year, depending on causal agents, susceptibility of cultivars, and climate region. Some are caused by a single agent, such as gray mold caused by Botrytis cinerea or powdery mildew caused by Erysiphe necator. Others result from the actions of a complex of pathogens such as grapevine trunk diseases (...
Sodium arsenite (NaAsO2) was especially used as a dormant spray to control grapevine trunk diseases (GTDs) in European vineyards until 2003 when it was banned. It was an efficient product but it was banned due to high risk for human health and the environment. Now, as one of the consequences with climatic changes, GTDs threaten the sustainability o...
Vitis vinifera is affected by many diseases every year depending on causal agents, susceptibility of cultivars and climate region. Some are caused by a single agent, such as gray mold caused by Botrytis cinerea or powdery mildew caused by Erysiphe necator, respectively. Others result from the actions of a complex of pathogens like grapevine trunk d...
Wood degrading diseases are escalating in vineyards all over the world, inducing heavy economic losses. The diseases are caused by fungal pathogens that invade the innermost xylem part of the trunk and trigger many metabolic disorders of vines leading to hindered productivity. In particular, esca disease in which Phaemoniella chlamydospora and Phae...
This is a presentation about vine surgery ("curetage" in French), an ancient technique which is the subject of a renewed interest in the context of trunk diseases.
Since the early 1990s, grapevine trunk diseases (GTDs) have posed threats for viticulture. Esca complex, Eutypa- and Botryosphaeria- diebacks, mostly detected in adult vineyards, are currently responsible for considerable economic losses in the main vine-growing areas of the world. Other GTDs, such as Petri- (Esca complex) and Black-foot diseases,...
Species of Diaporthe are considered important plant pathogens, saprobes, and endophytes on a wide range of plant hosts. Several species are well-known on grapevines, either as agents of pre- or post-harvest infections, including Phomopsis cane and leaf spot, cane bleaching, swelling arm and trunk cankers. In this study we explore the occurrence, di...
Wood grapevine diseases: implementation of research programme to provide solutions to professionals Studies on two grapevine wood diseases (esca, BDA) showed their effect on the yield and the spring shoot growth, which canceled two years after the onset of the symptoms. These diseases also led to changes in the analytical properties of musts and wi...
The ascomycete Diplodia seriata is one of the causal agent of grapevine trunk diseases. Here, we present a draft genome sequence of D. seriate isolate F98.1 (37.27 Mb, 512 contigs, 112 scaffolds, and 8,087 predicted protein-coding genes).
As a result of the increasing economic impact of grapevine trunk diseases on viticulture worldwide, the efficient and viable control strategies are urgently needed. However, understanding both plant-pathogen interactions and plant physiological changes related to these diseases is fundamental to such an achievement. In this study, we analysed the e...
Pestalotioid fungi associated with grapevine wood diseases in France are regularly found in vine growing
regions, and research was conducted to identify these fungi. Many of these taxa are morphologically indistinguishable, but sequence data can resolve the cryptic species in the group. Thirty pestalotioid fungi were isolated from infected grapevin...
The article on fungal diseases of grapevine wood vine has been updated. This new version has been completed with the addition of a new chapter concerning the history of wood grapevine diseases from Ancient Times to the French Revolution (1789). A history is also described in each of the other chapters constituting this article. It includes more tha...
CONTEXTE - Une rencontre, les 17 et 18 no- vembre 2015 à Colmar, a permis de faire le point sur les travaux de recherche en cours et les avancées depuis 2010 en France concernant les maladies du bois (MDB) de la vigne.
TRAVAUX - Le point épidémiologique a sou- ligné l’inquiétante expansion des MDB. Le tour des connaissances acquises et travaux de c...
Liquid chromatography-diode array screening of the organic extract of the cultures of 13 isolates of the fungus Neofusicoccum parvum, the main causal agent of botryosphaeria dieback of grapevine, showed similar metabolites. One strain was selected for further chemical studies and led to the isolation and characterisation of 13 metabolites. Structur...
The International COST Action FA1303 Workshop on " Sustainable control of Grapevine Trunk Diseases: current state and future prospects " was held in Cognac, France, on June 23-24 2015. The meeting was attended by 90 participants. Forty-eight oral and posterpapers were presented,in four sessions: Pathogen characterization, detection and epidemiology...
Botryosphaeria dieback, esca and Eutypa dieback are three economic major grapevine trunk diseases that cause severe yield reduction in vineyards worldwide. The frequency of disease symptoms has increased considerably over the past decade, and no efficient treatment is currently available to control these diseases. The different fungi associated wit...
Botryosphaeria dieback is a fungal grapevine trunk disease that currently
represents a threat for viticulture worldwide because of the important economical losses
due to reduced yield of affected plants and their premature death. Neofusicoccum parvum
and Diplodia seriata are among the causal agents. Vine green stems were artificially
infected with...
Three major grapevine trunk diseases, esca, botryosphaeria dieback and eutypa dieback, pose important economic problems for vineyards worldwide, and currently, no efficient treatment is available to control these diseases. The different fungi associated with grapevine trunk diseases can be isolated in the necrotic wood, but not in the symptomatic l...
Botryosphaeria dieback is a fungal grapevine trunk disease which represents a threat for viticulture worldwide due to the decreased production of affected plants and their premature death. This dieback is characterized by a typical wood discoloration called "brown stripe". Herein, a proteome comparison of the brown striped wood from Botryosphaeria...
This review presents an overview of eutypa dieback, esca and botryosphaeria dieback, the predominant grapevine trunk diseases worldwide. It covers their symptomatologies in the trunk, leaves and berries; the characteristics of the different fungal species associated with them; and host–pathogen interactions. Here, the host–pathogen relationship is...
Les maladies du bois sont considérées comme très dommageables pour la pérennité du patrimoine viticole car les champignons responsables de ces maladies attaquent les organes pérennes de la vigne, provoquant à plus ou moins long terme la mort du cep. Dans le vignoble, elles se manifestent par différentes symptomatologies au niveau de la partie herba...
Les analyses microbiologiques réalisées sur le matériel végétal à différents stades de production des plants (matériel de propagation, greffage, stratification et élevage des plants) ont montré que les contaminations par les champignons associés aux maladies du bois ont lieu lors de la stratification et l’élevage au champ.
Microbiological analyse...
Background and Aims: Esca is a devastating wood-decay disease that affects major grape-producing areas around the world. Xylem pathogenic fungi produce a systemic effect on the development of foliar symptoms and glutathione metabolism in presence of oxidative species. This study focuses on sugar variations in Vitis vinifera leaves, in particular in...
Phaeomoniella chlamydospora, (Chaetothyriales, Herpotrichiellaceae) is one of the main causal agents of Petri disease and esca on grapevines. We have used AFLP markers to study the population genetic structure of 74 isolates collected at different spatial scales: 56 isolates originated from vines with esca disease sampled from four French vineyards...
Geographic and vine cultivar origin of the Phaeomoniella chlamydospora isolates collected in French vineyards in 1997.
In one viticultural area in French vineyards (Côtes-de-Provence), some important declines were observed in young plantations. These plants between 3 and 6 year old were characterized by dieback of shoots accompanied by leaf drop, shrivelling and drying of fruit clusters. In the most serious cases, grafts had died and from the rootstock, it was poss...
The French vineyard is affected by three principal wood diseases: Eutypa dieback, esca and black dead arm (BDA). Phaeomoniella chlamydospora, Phaeocremonium aleophilum, Eutypa lata, Fomitiporia mediterranea, Diplodia seriata, Diplodia mutila and Neofusicoccum parvum are the main fungi isolated in France and associated with grapevine trunk diseases....
Grapevine trunk diseases are very harmful to wine-growing heritage durability because the fungi responsible, by attacking perennial organs, cause at a more or less long-term the death of the vine stock. Esca and BDA are the two main pathogens inducing such decaying diseases. The infection can be diagnosed by the presence in the wood forming tissues...
A bioassay-guided fractionation of a culture filtrate of Botryosphaeria obtusa led to the isolation of four dihydroisocoumarins, named mellein 1, 4-hydroxymellein 2, 7-hydroxymellein 3 and the new 4,7-dihydroxymellein
4. LC-UV-DAD-MS analysis of vine wood infected by B. obtusa revealed the presence of mellein (1). Botryosphaeria obtusa was also abl...
This review presents an overview of eutypa dieback, esca and botryosphaeria dieback, the predominant grapevine trunk diseases worldwide. It covers their symptomatologies in the trunk, leaves and berries; the characteristics of the different fungal species associated with them; and host–pathogen interactions. Here, the host–pathogen relationship is...
Esca is a devastating disease of grapevines involving xylem-inhabiting fungi. Among these, Phaeomoniella chlamydospora and Phaeoacremonium aleophilum are considered as the causal agents. We show that they pres- ent different structural features and act on plant cells by very different mechanisms. Their sensitivity to tempera- ture differed, with op...
Esca is a devastating disease of grapevines involving xylem-inhabiting fungi. Among these, Phaeomoniella chlamydospora and Phaeoacremonium aleophilum are considered as the causal agents. We show that they present different structural features and act on plant cells by very different mechanisms. Their sensitivity to temperature differed, with optimu...
Une enquête menée auprès des pépiniéristes du Sud-Est de la France a permis de mettre
en évidence les champignons pionniers de l’esca (Phaeomoniella chlamydospora, Phaeoacremonium aleophilum), ceux associés au Black Dead Arm (Botryosphaeria obtusa, Neofusicoccum parvum), l’agent responsable du pied noir (Neonectria liriodendri)
et celui de l’excori...
Une étude menée en pépinière, sur les champignons associés aux maladies du bois, a montré la présence des champignons pionniers de l'esca, ceux associés au black dead arm ainsi que l'agent de l'excoriose dans les tissus ligneux des bois destinés à la pépinière (greffons et porte-greffe). La faible présence des champignons de l'esca dans le matériel...
Isolates of Phaeomomella chlamydospora (Phc) and Phaeoacremonium aleophilum (Pha), two haploid, deuteromycetous fungi, were obtained from vines showing symptoms of esca disease in different localities in two French regions, and within a single vineyard in one of these regions. The population genetic structure was determined in both fungi using rand...
Black dead arm was first identified in French vineyards in 1999. It produces symptoms in the vine wood,
causing decline and eventually death. Previously, this disease was confused with esca because of the similarity of the
foliar symptoms. Two forms of black dead arm, a mild and a severe form, were observed in French vineyards on
Cabernet Sauvignon...
A group of Phaeoacremonium isolates first distinguished by the red pigmentation of the reverse of their colonies, is described as a new species, P. viticola, on the basis of molecular data. An intensive sampling in French vineyards affected by the Esca disease has shown that this species is rare compared to P. aleophilum and P. chlamydosporum and i...
A group of Phaeoacremonium isolates first distinguished by the red pigmentation of the reverse of their colonies, is described as a new species, P. viticola, on the basis of molecular data. An intensive sampling in French vineyards affected by the Esca disease has shown that this species is rare compared to P. aleophilum and P. chlamydosporum and i...
Comparative microflora studies of one-year-old pruned and unpruned canes carried out during dormancy period over three consecutive years showed that Phaeoacremonium chlamydosporum was more frequently isolated from pruned than unpruned canes, while Phaeoacremonium aleophilum was found as much in pruned as in unpruned canes. Inoculations of pruning w...