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Updated: Aug 27, 2025

Screening and Identification of RNA Silencing Suppressors from Secreted Effectors of Plant Pathogens
Published on: February 3, 2020
[Poleroviruses: movement in the vascular tissue and suppression of RNA silencing]
Julia De Cillia1, Jérôme Mutterer1, Diane Bortolamiol-Bécet1
1Institut de biologie moléculaire des plantes du CNRS, Université de Strasbourg, 12, rue du Général-Zimmer, 67084 Strasbourg cedex, France.
Abstract:
Members of the Luteoviridae family occupy a very special position among plant viruses. Unlike most plant viruses that can infect almost all cell types, these viruses exhibit a specific tropism restricted to vascular tissues. The infection of these tissues is maintained by a piercing-sucking insect vector, an aphid that promotes viral plant-to-plant transmission by feeding on phloem sap. This review focuses on the movement in the phloem of viruses belonging to the Luteoviridae family underlining the roles of viral proteins in this process. A second part is dedicated to the unique mode of action of the silencing suppressor of the Polerovirus genus (one of the three Luteoviridae genera). Finally, several hypotheses are discussed in order to explain the phloem restriction of these peculiar viruses.
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