Unfortunately, no pictures of typical infections are included nor what effect(s) the infection has on growth properties, temperature dependence behavior, nor is the natural infection transmission mode identified.
(“The virus and the disease were transmissible by grafting, but not by aphid or mechanical transmission, and only to rose (Rosa spp.) [4].”). (“Virus used for genomic DNA characterization in this study was obtained from naturally infected plants of the rose cv. Dr. Merkeley in Minnesota, USA.”)
Please note the following “Bindu Poudel studied another virus BLACKBERRY YELLOW VEIN ASSOCIATED VIRUS, BYVaV, and found that she could infect multiflora with it.”
It has been fun to help with graft transmissions over the years and in some cases bring symptomatic plant tissue and contribute to the process of identifying more new viruses. Soon more papers will come out on this and other viruses. There are more on the back burner to finish characterizing. It is amazing when people look close how many viruses are out there left to characterize!!!
I wasn’t able to google and find good pics of the Rasb. Yellow Vein Associated Virus. It sounds like the symptoms likely have some similarities. The viruses are pretty different, but that shouldn’t keep them from producing similar symptoms. Rose Yellow Vein Virus is a Caulimoviridae virus with double stranded DNA and the Raspberry virus is double stranded RNA and a member of Closteroviridae.
The good thing as time goes by will be that there will be some good diagnostic tools (primers, antibodies, etc.) that will help us understand how widespread some of these viruses are and allow us to have plants tested.
It looks like the Ph.D. thesis study of four new rose viruses will be available soon as the defense is scheduled for December 18, 2012.
"December 18, 2012
Ph.D. Defense Seminar: “Identification, transmission, and genomic characterization of four new viruses in cultivated rose.” Dimitre Mollov, Ph.D. Candidate, Department of Plant Pathology, University of Minnesota"
David, glad to see such progress being made and that there is hope for screening (and cleaning) these nasty microbeasties.
In the paper you write “The virus and the disease were transmissible by grafting, but not by aphid or mechanical transmission, and only to rose (Rosa spp.)”
Since viruses don’t arise and spread by spontaneous generation do you have any idea what the natural vector is for rose yellow vein virus, and do you think it comes from some other plant species in the wild?
That’s a great point about how it is spreading. I suspect it spreads mainly by clonal propagation and then root grafts in older established gardens. It will be good to consider and test other possible vectors as well. There are a lot of viruses out there for scientists to initially characterize and then continue to learn more about.
Dimitre defended his Ph.D. yesterday and did a fantastic job! His public seminar was well attended. There is an anticipation for 6 papers coming out of this thesis research total. There are four newly described and characterized viruses that he studied and will report on. Some of the papers will be more genomic in focus and others will have a more practical bent focusing on the symptoms and transmission in roses. In addition, there are more new rose viruses to continue characterizing, but all in due time.
The Minnesota Rose Society kindly contributed to part of Dimitre’s research and contributed the resources needed to sequence one of the viruses.
Thankfully Dimitre has the passion and interest and hopefully will have the opportunity to continue studying rose viruses in his current position.
The reason there has been relatively little reported for new viruses in roses over the past few decades compared to many other crops is not that they are hard to find, but due to lack of funding and people willing to pursue them.