Triticum mosaic virus: A New Virus Isolated from Wheat in Kansas

Plant Disease - Tập 92 Số 5 - Trang 808-817 - 2008
Dallas L. Seifers1, T. J. Martin1, T. L. Harvey2, John P. Fellers3, James P. Stack4, Marietta Ryba-White4, Stephen Haber5, Oleg V. Krokhin6, Victor Spicer6, Nicole E.J. Lovat6, Andrej Yamchuk6, Kenneth G. Standing6
1Professors, Kansas State University, Agricultural Research Center-Hays, Hays 67601-9228
2Professor, Department of Entomology, Kansas State University, Manhattan 66506.
3United States Department of Agriculture–Agricultural Research Service–PSERU, Department of Plant Pathology, Manhattan, KS 66506
4Department of Plant Pathology, Kansas State University, Manhattan,
5Cereal Research Centre, Agriculture & Agri-Food Canada, Winnipeg, Manitoba, Canada
6Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba, Canada

Tóm tắt

In 2006, a mechanically-transmissible and previously uncharacterized virus was isolated in Kansas from wheat plants with mosaic symptoms. The physiochemical properties of the virus were examined by purification on cesium chloride density gradients, electron microscopy, sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE), sequencing of the nucleotides and amino acids of the coat protein, and immunological reactivity. Purified preparations contained flexuous, rod-shaped particles that resembled potyviruses. The coat protein was estimated from SDS-PAGE to have a mass of approximately 35 kDa. Its amino acid sequence, as deduced from DNA sequencing of cloned, reverse-transcribed viral RNA and separately determined by time-of-flight mass spectrometry, was most closely related (49% similarity) to Sugarcane streak mosaic virus, a member of the Tritimovirus genus of the family Potyviridae. The virus gave strong positive reactions during enzyme-linked immunosorbent assays using polyclonal antibodies raised against purified preparations of the cognate virus but gave consistent negative reactions against antibodies to Wheat streak mosaic virus (WSMV), other wheat potyviruses, and the High Plains virus. When the virus was inoculated on the WSMV-resistant wheat cv. RonL, systemic symptoms appeared and plant growth was diminished significantly in contrast with WSMV-inoculated RonL. Taken together, the data support consideration of this virus as a new potyvirus, and the name Triticum mosaic virus (TriMV) is proposed.

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