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ARS Home » Pacific West Area » Parlier, California » San Joaquin Valley Agricultural Sciences Center » Crop Diseases, Pests and Genetics Research » Research » Publications at this Location » Publication #410999
Research Project: Development of Applied Management Systems for Diseases of Perennial Crops with Emphasis on Vector-Borne Pathogens of Grapevine and Citrus

Location: Crop Diseases, Pests and Genetics Research

Title: Identification and molecular characterization of Dahlia common mosaic virus from Silphium spp., a new natural host of the virus

Author
item Zhai, Ying
item GNANASEKARAN, PRABU - Washington State University
item IFTIKHAR, ROMANA - University Of Agriculture, Faisalabad
item TURNER, KATHRYN - The Land Institute
item VAN TASSEL, DAVID - The Land Institute
item CASSETTA, ERIC - The Land Institute
item LUBIN, TERRA - University Of Kansas
item PAPPU, HANU - Washington State University

Submitted to: PhytoFrontiers
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 3/20/2024
Publication Date: 5/31/2024
Citation: Zhai, Y., Gnanasekaran, P., Iftikhar, R., Turner, K., Van Tassel, D., Cassetta, E., Lubin, T., Pappu, H.R. 2024. Identification and molecular characterization of Dahlia common mosaic virus from Silphium spp., a new natural host of the virus. PhytoFrontiers. https://doi.org/10.1094/PHYTOFR-12-23-0156-SC.
DOI: https://doi.org/10.1094/PHYTOFR-12-23-0156-SC

Interpretive Summary: Silphium plants can tolerate extensive stress and withstand in high-pressure situations, such as drought and cold temperature in the winter. Since 2018, symptoms suggestive of virus infection were observed in several silphium plants in Saline County, Kansas. Symptoms included veinal chlorosis or clearing (often in widened veins), stunting, and twisted, narrowed, or toothed leaf distortion. We found the presence of dahlia common mosaic virus (DCMV) from the silphium plant, and this virus is widely prevalent in cultivated dahlia, an ornamental flowering plant. Based on the finding of DCMV in silphium it appears that the host range of DCMV includes plant species other than dahlia.

Technical Abstract: Dahlia common mosaic virus (DCMV) was previously reported to infect only dahlias (Dahlia variabilis). However, DCMV was identified for the first time in association with Silphium spp. The complete genome of DCMV was cloned and sequenced from naturally occurring symptomatic silphium plants grown in Kansas, USA. The two DCMV silphium isolates sequenced showed over 98% sequence identity with those reported from dahlia (Dahlia variabilis). The Dahlia variabilis endogenous pararetroviral sequence (DvEPRS) was also detected in all 19 silphium samples tested in this study suggesting that DvEPRS may exist as an integrated sequence in the silphium genome as well. Our findings indicate that the host range of DCMV appears to include other plant species besides dahlia.