The Plant Pathology Journal 2011;27(3):197-206.
Published online September 30, 2011.
The Road to RNA Silencing is Paved with Plant-Virus Interactions
Peter Palukaitis
RNA silencing has had a large impact on biology in general, as well as on our understanding of plantpathogen interactions, especially interactions between plants and viruses. While most of what we know about the mechanism of RNA silencing was deduced in the last 12 years, many of the interactions between plants and viruses, as well as virus-virus interactions in plants, which we now know are manifestations of RNA silencing, were the subject of decades of work from numerous laboratories. These laboratories were examining the nature and extent of phenomena such as recovery from infection, the formation of dark green islands resistant to re-infection, synergy between unrelated viruses and cross-protection between related viruses, all first described in the late 1920s. In this review, the relationships between these phenomena and their place in the defense mechanism we call RNA silencing will be described, to show how they are all linked.
Key Words: RNA silencing, recovery, dark-green islands, cross-protection, synergy, RNA silencing suppressors

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