Résumé
Cauliflower mosaic virus (CaMV) is transmitted by aphids. CaMV forms in infected cells many viralfactories, which contain a lot of CaMV particles, and a single “transmission body” (TB). The TBcontains only few viral particles and the aphid transmission protein P2. P2 is absolutely requiredfor virus transmission because it binds CaMV particles to a receptor localized in the stylets of theaphid vector. (...)