101. Functions of Virus and Host Factors During Vector-mediated Transmission
- Author
-
Stéphane Blanc, Drucker, M., Biologie et Génétique des interactions Plantes-parasites pour la Protection Intégrée, Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Carole Caranta (Editeur), Miguel A. Aranda (Editeur), Mark Tepfer (Editeur), J.J Lopez-Moya (Editeur), and ProdInra, Migration
- Subjects
[SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology ,viruses ,VECTEUR ,[SDV.MP] Life Sciences [q-bio]/Microbiology and Parasitology ,RELATION HOTE-PARASITE - Abstract
UMR BGPI Equipe 2; International audience; Most plant viruses are transmitted by living vectors that transport viruses to a new host plant. One discriminates between circulative transmission, where viruses must pass through the vector interior and are usually inoculated with the saliva on a healthy plant, and non-circulative transmission, where viruses do not need to pass through the vector interior but are directly inoculated from the mouth parts into a new host. Especially transmission of non-circulative viruses has been regarded as a simple process where a vector more or less accidentally transports the virus. However, it becomes more and more evident that this scenario is unlikely, because transmission constitutes a dramatic bottleneck of the virus life cycle, where only very few viral genomes pass to a new host, and where a given virus must do everything to ensure successful transmission. We will show and discuss in this chapter that viruses - also in non-circulative transmission - deliberately manipulate their hosts and vectors in often very unexpected ways to optimise their transmission.