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Dalmatian Toadflax (Linaria dalmatica): New Host for Cucumber Mosaic Virus

Published online by Cambridge University Press:  20 January 2017

Courtney L. Pariera Dinkins*
Affiliation:
Department of Land Resources & Environmental Sciences, Montana State University, Bozeman, MT 59717
Sue K. Brumfield
Affiliation:
Department of Plant Sciences and Plant Pathology, Montana State University, Bozeman, MT 59717
Robert K. D. Peterson
Affiliation:
Department of Land Resources & Environmental Sciences, Montana State University, Bozeman, MT 59717
William E. Grey
Affiliation:
Department of Plant Sciences and Plant Pathology, Montana State University, Bozeman, MT 59717
Sharlene E. Sing
Affiliation:
Department of Land Resources & Environmental Sciences, Montana State University, Bozeman, MT 59717
*
Corresponding author's E-mail: [email protected]

Abstract

To date, there have been no reports of Dalmatian toadflax serving as a host for cucumber mosaic virus (CMV). Infestations of Dalmatian toadflax may serve as a reservoir of CMV, thereby facilitating aphid transmission of CMV to both agricultural crops and native plants. The goal of this study was to determine whether Dalmatian toadflax is a host for CMV. Dalmatian toadflax seedlings were randomly assigned to two treatments (18 replicates/treatment): no inoculation (control) and inoculation with CMV (Fast New York strain). The Dalmatian toadflax seedlings were inoculated by standard mechanical methods and tested for the presence of CMV using enzyme-linked immunosorbent assay (ELISA). Ten of the 18 CMV-inoculated toadflax plants tested positive for the virus; 6 of the 18 displayed systemic mosaic chlorosis and leaf curling. All control plants tested negative. Transmission electron microscopy obtained from CMV-positive plants confirmed the presence of CMV based on physical properties. To verify CMV infestation, tobacco plants were assigned to the following treatments (six replicates/treatment): no inoculation (control), CMV-negative (control) inoculation, and a CMV-positive inoculation. Plants were inoculated by standard methods. Five of the 6 tobacco plants treated with the CMV-positive inoculum tested positive for CMV using ELISA. All control plants tested negative for the virus.

Type
Research
Copyright
Copyright © Weed Science Society of America 

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References

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