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Tritimovirus P1 functions as a suppressor of RNA silencing and an enhancer of disease symptoms
Wheat streak mosaic virus (WSMV) is an eriophyid mite-transmitted virus of the genus Tritimovirus, family Potyviridae. Complete deletion of HC-Pro has no effect on WSMV virulence or disease synergism, suggesting that a different viral protein suppresses post-transcriptional gene silencing (PTGS). PTGS suppression assays using Nicotiana benthamiana 16C plants expressing GFP were conducted with each WSMV protein; only P1 suppressed PTGS. Symptom enhancement assays were conducted by inoculating Potato virus X (PVX) onto transgenic N. benthamiana. Symptoms produced by PVX were more severe on transgenic plants expressing WSMV P1 or potyvirus HC-Pro compared to transgenic plants expressing GFP or WSMV HC-Pro.
Brock A. Young
Drake C. Stenger
T. Jack Morris
Potato virus X
Wheat streak mosaic virus
Virus Research 2012 v.163 no.2
Journal Articles, USDA Authors, Peer-Reviewed
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.
Agricultural Research Service
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