Catherine Reinbold

Immunogold labelling of purified virions from a co-infected (GLRaV-1 and GVA) grapevine accession... more Immunogold labelling of purified virions from a co-infected (GLRaV-1 and GVA) grapevine accession Purified virions GLRaV-1 GVA 300 μm 750 μm Virions immunogold labelling Results and Conclusion References Grapevine leafroll-associated virus 1 (GLRaV-1, Ampelovirus) and Grapevine virus A (GVA, Vi7virus) are composed of flexuous parRcles enclosing a posiRve single strand RNA of 18.7 Kb and 7.5 Kb, respecRvely. GLRaV-1 and GVA are restricted to vascular Rssues of host plants and their transmission by mealybugs has been shown to fulfill the criteria of a "semi-persistent and non-circulaRve" mode (Tsai et al., 2008). Previous studies grapevine viruses shed light on frequent co-infecRons with one or more Ampelovirus species, and Vi7virus species, while mono-infecRons of grape with Vi7virus are known but rare (Blaisdell et al., 2015). These observaRons on such a close associaRon in grape led us to suggest an assistance between Ampelovirus and Vi7virus virions during mealybug transmission (Hommay et al., 2008).

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Une protéine de la plante (Montia perfoliata) de la famille des Hsp 90 pourrait-elle être impliquée dans les interactions entre lutéovirus et micotubules?

HAL (Le Centre pour la Communication Scientifique Directe), Mar 9, 1997

Nouveaux aspects dans le cheminement d'un polérovirus dans ses deux pucerons vecteurs

National audienc

Minor capsid protein of poleroviruses is involved in vector specificity

National audienc

L'enroulement viral de la vigne et ses vecteurs, les cochenilles

New prospects in the study of interactions between a luteovirus and its aphid vectors

Mouthparts morphology of the mealybug Phenacoccus aceris

Bulletin of Insectology, 2018

The mealybug Phenacoccus aceris (Signoret) (Hemiptera Pseudococcidae) is a significant economic p... more The mealybug Phenacoccus aceris (Signoret) (Hemiptera Pseudococcidae) is a significant economic pest on grape as a vector of grapevine leafroll-associated viruses (GLRaVs) causing the damaging grapevine leafroll disease. To gain new insights into the feeding behavior and structural anatomy of this mealybug, the structure of the mouthparts was described using scanning and transmission electron microscopy and light microscopy. The piercing-sucking mouthparts of P. aceris are composed of a clypeolabral shield and a three-segmented labium with a groove on its anterior face containing the stylet fascicle. Fourteen pairs of different types of sensilla cover the exposed surface of the labium. The stylet fascicle consists of two mandibular stylets, with serrations on their distal extremity, surrounding two maxillary stylets. The maxillary stylets are interlocked and their coapted grooves delimitate the food and the salivary canals. No acrostyle-like structure was observed at the distal extr...

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Spatial Distribution Patterns of Parthenolecanium corni (Hemiptera, Coccidae) and of the Ampelovirus GLRaV-1 and the Vitivirus GVA in a Commercial Vineyard

Viruses, 2020

Distribution patterns of the European fruit lecanium Parthenolecanium corni (Bouché) and of grape... more Distribution patterns of the European fruit lecanium Parthenolecanium corni (Bouché) and of grapevine leafroll-associated virus-1 (GLRaV-1) and grapevine virus A (GVA) were monitored from 2003 to 2015 in a Riesling vine plot in the northeast of France. Virus spread was compared between two periods: 2003–2008 and 2009–2014. The percentage of infected vines increased from 54 to 78% for GLRaV-1 and from 14 to 26% for GVA. The spatial distribution of viruses and of P. corni was analysed using permutation tests and revealed an aggregative pattern. Virus distribution was not associated with the density of P. corni population on grapevines. However, GLRaV-1 and GVA spread mainly from initially infected vines. New GLRaV-1 and GVA infections were more frequent on vines near primarily infected vines, first anisotropically along the row, then between neighbouring rows. Virus spread was similar to those described in literature with grapevine mealybug species. This slow vine-to-vine progression ...

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InvaProtect - Protection durable des végétaux contre les bioagresseurs invasifs dans les vergers et les vignes

HAL (Le Centre pour la Communication Scientifique Directe), 2018