The "Neglected Viruses" of Taihu : Abundant Transcripts for Viruses Infecting Eukaryotes and Their Potential Role in Phytoplankton Succession.

Autor:	Pound HL; Department of Microbiology, The University of Tennessee, Knoxville, Knoxville, TN, United States., Gann ER; Department of Microbiology, The University of Tennessee, Knoxville, Knoxville, TN, United States., Tang X; State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China., Krausfeldt LE; Department of Microbiology, The University of Tennessee, Knoxville, Knoxville, TN, United States., Huff M; Department of Entomology and Plant Pathology, The University of Tennessee, Knoxville, Knoxville, TN, United States., Staton ME; Department of Entomology and Plant Pathology, The University of Tennessee, Knoxville, Knoxville, TN, United States., Talmy D; Department of Microbiology, The University of Tennessee, Knoxville, Knoxville, TN, United States., Wilhelm SW; Department of Microbiology, The University of Tennessee, Knoxville, Knoxville, TN, United States.
Jazyk:	angličtina
Zdroj:	Frontiers in microbiology [Front Microbiol] 2020 Mar 06; Vol. 11, pp. 338. Date of Electronic Publication: 2020 Mar 06 (Print Publication: 2020).
DOI:	10.3389/fmicb.2020.00338
Abstrakt:	Drivers of algal bloom dynamics remain poorly understood, but viruses have been implicated as important players. Research addressing bloom dynamics has generally been restricted to the virus-infection of the numerically dominant (i.e. bloom forming) taxa. Yet this approach neglects a broad diversity of viral groups, limiting our knowledge of viral interactions and constraints within these systems. We examined hallmark virus marker genes in metatranscriptomic libraries from a seasonal and spatial survey of a Microcystis aeruginosa bloom in Lake Tai ( Taihu ) China to identify active infections by nucleocytoplasmic large DNA viruses (NCLDVs), RNA viruses, ssDNA viruses, bacteriophage, and virophage. Phylogenetic analyses revealed a diverse virus population with seasonal and spatial variability. We observed disproportionately high expression of markers associated with NCLDVs and ssRNA viruses (consistent with viruses that infect photosynthetic protists) relative to bacteriophage infecting heterotrophic bacteria or cyanobacteria during the height of the Microcystis bloom event. Under a modified kill-the-winner scheme, we hypothesize viruses infecting protists help suppress the photosynthetic eukaryotic community and allow for the proliferation of cyanobacteria such as Microcystis . Our observations provide a foundation for a little considered factor promoting algal blooms. (Copyright © 2020 Pound, Gann, Tang, Krausfeldt, Huff, Staton, Talmy and Wilhelm.)
Databáze:	MEDLINE
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