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Chronological distribution of dinoflagellate-infecting RNA virus in marine sediment core. | LitMetric

Chronological distribution of dinoflagellate-infecting RNA virus in marine sediment core.

Sci Total Environ

Faculty of Science and Technology, Kochi University, Nankoku 783-8502, Kochi, Japan; Faculty of Agriculture and Marine Science, Kochi University, Nankoku 783-8502, Kochi, Japan; Center for Advanced Marine Core Research, Kochi University, Nankoku 783-8502, Kochi, Japan. Electronic address:

Published: May 2021

AI Article Synopsis

Article Abstract

A bivalve-killing marine dinoflagellate, Heterocapsa circularisquama, is susceptible to the infectious single-stranded RNA virus, Heterocapsa circularisquama RNA virus (HcRNAV). The ecological relationship between H. circularisquama and HcRNAV was intensively studied from 2001 through 2005; however, only limited data are available for the ecological dynamics of HcRNAV before 2001. In this study, we applied radiometric dating and reverse transcription PCR (RT-PCR) to determine the chronological distribution of HcRNAV in a marine sediment core sampled from the Uranouchi Inlet, Kochi, Japan, where H. circularisquama was first discovered. Our results show that HcRNAV had existed in the inlet long before its first bloom in 1988. Furthermore, five HcRNAV variants, phylogenetically distinguishable based on the nucleotide sequence of the major capsid protein (MCP) gene, were identified. These variants were found to be distributed throughout the core over time, suggesting that the HcRNAV sequences registered in the NCBI database are only a portion of the variants that have emerged in the history of HcRNAV diversification. Herein, we have verified the applicability of the retrospective approach for speculating the distribution of algal RNA viruses over time in aquatic environments.

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http://dx.doi.org/10.1016/j.scitotenv.2021.145220DOI Listing

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