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ARS Home » Pacific West Area » Corvallis, Oregon » Horticultural Crops Research Unit » Research » Publications at this Location » Publication #327069
Title: A novel emaravirus is associated with redbud yellow ringspot disease

Author
item DI BELLO, PATRICK - University Of Arkansas
item LANEY, A - University Of Arkansas
item DRUCIAREK, T - University Of Arkansas
item HO, T - University Of Arkansas
item GERGERICH, R - University Of Arkansas
item Keller, Karen
item Martin, Robert
item TZANETAKIS, I - University Of Arkansas

Submitted to: Virus Research
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 5/30/2016
Publication Date: 8/15/2016
Citation: Di Bello, P.L., Laney, A.G., Druciarek, T., Ho, T., Gergerich, R.C., Keller, K.E., Martin, R.R., Tzanetakis, I.E. 2016. A novel emaravirus is associated with redbud yellow ringspot disease. Virus Research. 222:41-47. doi: 10.1016/j.virusres.2016.05.027.

Interpretive Summary: Yellow ringspot is the only virus-like disease reported in redbud causing symptoms that include vein clearing, chlorotic ringspots and oak-leaf pattern. A putative new emaravirus was present in 48 of 48 trees tested that had typical yellow ringspot symptoms and the name Redbud yellow ringspot associated virus is proposed. The virus genome is composed of at least five RNA segments. Two coding regions were studied to determine virus diversity to see if symptom variation was a result of the presence of different virus strains. Host range was evaluated and it was found that this virus can infect other legumes including important food crops under experimental conditions. Mite transmission using Aculops cercidis was also tested, but unsuccessful.

Technical Abstract: Yellow ringspot is the only virus-like disease reported in redbud (Cercis spp.) with symptoms including vein clearing, chlorotic ringspots and oak-leaf pattern. A putative new emaravirus was present in 48 of 48l trees displaying typical yellow ringspot symptoms and the name redbud yellow ringspot associated virus is proposed. The virus genome is composed of at least five RNA segments. Two coding regions were studied to determine isolate diversity and its potential role in the differential symptomology observed among genotypes. Host range was evaluated using graft transmission and by testing species found in close proximity to infected trees. Mite transmission using Aculops cercidis was also tested. Based on this study and the accumulated knowledge on emaravirus evolution we propose that speciation is allopatric, with vectors being a major component of the process.