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Abstract Detail

Symbioses: Plant, Animal, and Microbe Interactions

Caudle, Keri L. [1], Gillock, Eric [1].

Host range of an endogenous strain of Dahlia mosaic virus in members of Asteraceae.

A newly discovered strain of Dahlia mosaic virus (DMV) called DMV-D10 was first observed in Dahlia variabilis in 2008. DMV-D10 does not induce visible symptoms of infection in the host plant, and is classified as an endogenous virus. These viruses have the ability to integrate their viral sequences into the host plant genome, which can be transmitted to offspring. No studies have examined the host range of DMV-D10. Because DMV-D10 has only been observed in Dahlia, the objective for this study was to determine if presence of DMV-D10 follows an evolutionary relationship among species closely related to Dahlia. It was hypothesized species in the same Asteraceae tribe (Coreopsideae) as Dahlia were more likely to be infected with DMV-D10 compared to species in other Asteraceae tribes. Thirty-five species across ten Asteraceae tribes were collected, and DNA was extracted to determine DMV-D10 infection. DNA sequencing results of PCR products for a movement protein gene indicate DMV-D10 is widely spread across Asteraceae. Fragments of the DMV-D10 genome were present in thirteen species across seven tribes. Therefore, 37% of species in this study contained DMV-D10 viral sequences. Additionally, six species across five tribes contained Dahlia common mosaic virus viral sequences, and three species across two tribes contained Dahlia mosaic virus viral sequences. Therefore, phylogenetic relationship in host plants does not necessarily determine DMV-D10 infection. This leads to questions of how this virus can move to species in other Asteraceae tribes. Some potential hypotheses include pollen transmission, an unknown insect vector, or possible plant-virus coevolution.

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1 - Fort Hays State University, Department of Biological Sciences, 600 Park Street, Hays, KS, 67601, USA

plant-virus coevolution
pollen transmission

Presentation Type: Oral Paper
Session: 24, Symbioses: Plant, Animal, and Microbe Interactions
Location: Fort Worth Ballroom 5/Omni Hotel
Date: Tuesday, June 27th, 2017
Time: 10:30 AM
Number: 24003
Abstract ID:71
Candidate for Awards:None

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