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标题：Virioplankton assemblages from challenger deep, the deepest place in the oceans
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作者：Chen Gao ; Yantao Liang ; Yong Jiang 等
期刊名称：iScience
印刷版ISSN：2589-0042
出版年度：2022
卷号：25
期号：8
页码：1-24
DOI：10.1016/j.isci.2022.104680
语种：English
出版社：Elsevier
摘要：SummaryHadal ocean biosphere, that is, the deepest part of the world’s oceans, harbors a unique microbial community, suggesting a potential uncovered co-occurring virioplankton assemblage. Herein, we reveal the unique virioplankton assemblages of the Challenger Deep, comprising 95,813 non-redundant viral contigs from the surface to the hadal zone. Almost all of the dominant viral contigs in the hadal zone were unclassified, potentially related to Alteromonadales and Oceanospirillales. 2,586 viral auxiliary metabolic genes from 132 different KEGG orthologous groups were mainly related to the carbon, nitrogen, sulfur, and arsenic metabolism. Lysogenic viral production and integrase genes were augmented in the hadal zone, suggesting the prevalence of viral lysogenic life strategy. Abundant rve genes in the hadal zone, which function as transposase in the caudoviruses, further suggest the prevalence of viral-mediated horizontal gene transfer. This study provides fundamental insights into the virioplankton assemblages of the hadal zone, reinforcing the necessity of incorporating virioplankton into the hadal biogeochemical cycles.Graphical abstractDisplay OmittedHighlights•The unique virioplankton assemblages of the Challenger Deep were revealed•Virus encoded auxiliary metabolic genes relating to the biogeochemical cycling•Viruses in deep and hadal zone tend to be lysogenic, and potentially mediate the horizontal gene transferAquatic science; Oceanography; Biological sciences; Genomics