Impact of Wheat streak mosaic virus and Triticum mosaic virus on transmission by Aceria tosichella Keifer (Eriophyidae) and virus epidemiology in wheat
نویسندگان
چکیده
Impact of Wheat streak mosaic virus and Triticum mosaic virus on transmission by Aceria tosichella Keifer (Eriophyidae) and virus epidemiology in wheatImpact of Wheat streak mosaic virus and Triticum mosaic virus on transmission by Aceria tosichella Keifer (Eriophyidae) and virus epidemiology in wheat" (2013). The wheat curl mite (WCM), Aceria tosichella Keifer, transmits a complex of viruses, Wheat streak mosaic virus(WSMV), Triticum mosaic virus (TriMV) and Wheat mosaic virus (WMoV), to wheat, Triticum aestivum, in the Great Plains. Co-infection of wheat by these viruses is frequently observed, increasing disease severity and yield loss. Current genetic work classifies WCM populations into two genotypes, Type 1 and Type 2. It has been shown that different mite genotypes are able to transmit viruses at varying rates. WCM-virus relations are very specific and can impact vector biology. In this study, the primary objective was to determine if co-infection of wheat by WSMV+ TriMV has an impact on each virus transmission rate by the WCM Type 1 and Type 2. An additional objective was to establish the impact of double viral infections on the biology of the mites and virus dispersal in the field. Using a series of transmission studies, it was determined that Type 1 WCMs do not transmit TriMV even in the presence of WSMV. Type 2 WCMs feeding on wheat infected with both viruses, have reduced WSMV transmission when compared to mites feeding on singly inoculated plants. However, TriMV transmission is increased when mites feed on wheat infected by both viruses. WSMV reduction in transmission, might be due to the fact that mites feeding on double infected plants have reduced survival when compared to single inoculated plants. Mite counts from the field indicated that mites feeding on WSMV infected plants had the highest populations, followed by the control, WSMV+TriMV and TriMV. In field conditions, WSMV transmission by Type 2 WCM was reduced when exposed to source plants with WSMV+TriMV. TriMV transmission was not different between mites feeding on single or double infected plants. Hence, in laboratory conditions, we saw the transmission of TriMV benefitting from co-infection with WSMV in wheat. But in the field, mites feeding on TriMV plants have reduced reproduction, which counters the enhanced transmission found in the laboratory. These findings enhance the understanding of WCM virus complex epidemiology. i Acknowledgments I would like to thank my advisor Gary L. Hein for mentoring me these past years. He has given …
منابع مشابه
Planting Date and Variety Selection for Management of Viruses Transmitted by the Wheat Curl Mite (Acari: Eriophyidae).
Wheat is an important food grain worldwide, and it is the primary dryland crop in the western Great Plains. A complex of three viruses (Wheat streak mosaic, Wheat mosaic, and Triticum mosaic viruses) is a common cause of loss in winter wheat production in the Great Plains. All these viruses are transmitted by the wheat curl mite (Aceria tosichella Keifer). Once these viruses are established, th...
متن کاملGenetic characterization of North American populations of the wheat curl mite and dry bulb mite.
The wheat curl mite, Aceria tosichella Keifer, transmits at least three harmful viruses, wheat streak mosaic virus (WSMV), high plains virus (HPV), and Triticum mosaic virus (TriMV) to wheat (Triticum aestivum L.) throughout the Great Plains. This virus complex is considered to be the most serious disease of winter wheat in the western Great Plains. One component of managing this disease has be...
متن کاملMOLECULAR ENTOMOLOGY Genetic Characterization of North American Populations of the Wheat Curl Mite and Dry Bulb Mite
The wheat curl mite, Aceria tosichella Keifer, transmits at least three harmful viruses, wheat streak mosaic virus (WSMV), high plains virus (HPV), and Triticum mosaic virus (TriMV) to wheat (Triticum aestivum L.) throughout the Great Plains. This virus complex is considered to be the most serious disease of winter wheat in the western Great Plains. One component of managing this disease has be...
متن کاملBrief Report Substitution of conserved cysteine residues in wheat streak mosaic virus HC-Pro abolishes virus transmission by the wheat curl mite
Substitutions in the amino-proximal region of wheat streak mosaic virus (WSMV) HC-Pro were evaluated for effects on transmission by the wheat curl mite (Aceria tosichella Keifer). Alanine substitution at cysteine residues 16, 46 and 49 abolished vector transmission. Although alanine substitution at Cys20 had no effect, substitution with arginine reduced vector transmission efficiency. Random su...
متن کاملThe Effect of Temperature, Relative Humidity, and Virus Infection Status on off-host Survival of the Wheat Curl Mite (Acari: Eriophyidae).
The wheat curl mite, Aceria tosichella Keifer, is an eriophyid pest of wheat, although its primary economic impact on wheat is due to the transmission of Wheat streak mosaic (WSMV), Wheat mosaic (also known as High Plains virus), and Triticum mosaic (TriMV) viruses. These viruses cause significant annual losses in winter wheat production throughout the western Great Plains. Temperature and humi...
متن کامل