Virus-host relationships of marine single-celled eukaryotes resolved from metatranscriptomics

Mohammad Moniruzzaman, Louie L. Wurch, Harriet Alexander, Sonya T. Dyhrman, Christopher J. Gobler and Steven W. Wilhelm ()
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Mohammad Moniruzzaman: The University of Tennessee
Louie L. Wurch: James Madison University
Harriet Alexander: Columbia University
Sonya T. Dyhrman: Columbia University
Christopher J. Gobler: School of Marine and Atmospheric Sciences, Stony Brook University
Steven W. Wilhelm: The University of Tennessee

Nature Communications, 2017, vol. 8, issue 1, 1-10

Abstract: Abstract Establishing virus–host relationships has historically relied on culture-dependent approaches. Here we report on the use of marine metatranscriptomics to probe virus–host relationships. Statistical co-occurrence analyses of dsDNA, ssRNA and dsRNA viral markers of polyadenylation-selected RNA sequences from microbial communities dominated by Aureococcus anophagefferens (Quantuck Bay, NY), and diatoms (Narragansett Bay, RI) show active infections by diverse giant viruses (NCLDVs) associated with algal and nonalgal hosts. Ongoing infections of A. anophagefferens by a known Mimiviridae (AaV) occur during bloom peak and decline. Bloom decline is also accompanied by increased activity of viruses other than AaV, including (+) ssRNA viruses. In Narragansett Bay, increased temporal resolution reveals active NCLDVs with both ‘boom-and-bust’ and ‘steady-state infection’-like ecologies that include known as well as novel virus–host interactions. Our approach offers a method for screening active viral infections and develops links between viruses and their potential hosts in situ. Our observations further demonstrate that previously unknown virus–host relationships in marine systems are abundant.

Date: 2017
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DOI: 10.1038/ncomms16054

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