Dataset Information

Virioplankton assemblages from challenger deep, the deepest place in the oceans.

ABSTRACT: Hadal 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.

SUBMITTER: Gao C

PROVIDER: S-EPMC9356048 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature

ACCESS DATA

Publications

Virioplankton assemblages from challenger deep, the deepest place in the oceans.

Gao Chen C Liang Yantao Y Jiang Yong Y Paez-Espino David D Han Meiaoxue M Gu Chengxiang C Wang Meiwen M Yang Yumei Y Liu Fengjiao F Yang Qingwei Q Gong Zheng Z Zhang Xinran X Luo Zhixiang Z He Hui H Guo Cui C Shao Hongbing H Zhou Chun C Shi Yang Y Xin Yu Y Xing Jinyan J Tang Xuexi X Qin Qilong Q Zhang Yu-Zhong YZ He Jianfeng J Jiao Nianzhi N McMinn Andrew A Tian Jiwei J Suttle Curtis A CA Wang Min M

iScience 20220627 8

Hadal 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 auxil ...[more]

PMID: 35942087

Similar Datasets

Project description:BackgroundMarine Group I (MGI) Thaumarchaeota, which play key roles in the global biogeochemical cycling of nitrogen and carbon (ammonia oxidizers), thrive in the aphotic deep sea with massive populations. Recent studies have revealed that MGI Thaumarchaeota were present in the deepest part of oceans-the hadal zone (depth > 6000 m, consisting almost entirely of trenches), with the predominant phylotype being distinct from that in the "shallower" deep sea. However, little is known about the metabolism and distribution of these ammonia oxidizers in the hadal water.ResultsIn this study, metagenomic data were obtained from 0-10,500 m deep seawater samples from the Mariana Trench. The distribution patterns of Thaumarchaeota derived from metagenomics and 16S rRNA gene sequencing were in line with that reported in previous studies: abundance of Thaumarchaeota peaked in bathypelagic zone (depth 1000-4000 m) and the predominant clade shifted in the hadal zone. Several metagenome-assembled thaumarchaeotal genomes were recovered, including a near-complete one representing the dominant hadal phylotype of MGI. Using comparative genomics, we predict that unexpected genes involved in bioenergetics, including two distinct ATP synthase genes (predicted to be coupled with H+ and Na+ respectively), and genes horizontally transferred from other extremophiles, such as those encoding putative di-myo-inositol-phosphate (DIP) synthases, might significantly contribute to the success of this hadal clade under the extreme condition. We also found that hadal MGI have the genetic potential to import a far higher range of organic compounds than their shallower water counterparts. Despite this trait, hadal MDI ammonia oxidation and carbon fixation genes are highly transcribed providing evidence they are likely autotrophic, contributing to the primary production in the aphotic deep sea.ConclusionsOur study reveals potentially novel adaptation mechanisms of deep-sea thaumarchaeotal clades and suggests key functions of deep-sea Thaumarchaeota in carbon and nitrogen cycling. Video Abstract.

Dataset Information

Virioplankton assemblages from challenger deep, the deepest place in the oceans.

Publications

Virioplankton assemblages from challenger deep, the deepest place in the oceans.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets