2019
DOI: 10.3389/fmicb.2019.02403
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A Review on Viral Metagenomics in Extreme Environments

Abstract: Viruses are the most abundant biological entities in the biosphere, and have the ability to infect Bacteria, Archaea, and Eukaryotes. The virome is estimated to be at least ten times more abundant than the microbiome with 107 viruses per milliliter and 109 viral particles per gram in marine waters and sediments or soils, respectively. Viruses represent a largely unexplored genetic diversity, having an important role in the genomic plasticity of their hosts. Moreover, they also play a significant role in the dy… Show more

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Cited by 65 publications
(50 citation statements)
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References 136 publications
(230 reference statements)
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“…The virus-host interactions in our datasets are biased towards some common viruses and host taxa, which reflects the taxonomic distribution of viruses and prokaryote in nature. For example, the three most commonly observed families (Siphoviridae, Myoviridae, and Podoviridae) account for 77% of all viruses in the VHM dataset (Additional file 1 : Figure S5) and are indeed the most commonly observed phage taxa in nature [ 4 , 33 ]. Another limitation of the study is that the GM was inferior to WIsH in predicting virus hosts on the viral contigs less than 10 kb.…”
Section: Discussionmentioning
confidence: 99%
“…The virus-host interactions in our datasets are biased towards some common viruses and host taxa, which reflects the taxonomic distribution of viruses and prokaryote in nature. For example, the three most commonly observed families (Siphoviridae, Myoviridae, and Podoviridae) account for 77% of all viruses in the VHM dataset (Additional file 1 : Figure S5) and are indeed the most commonly observed phage taxa in nature [ 4 , 33 ]. Another limitation of the study is that the GM was inferior to WIsH in predicting virus hosts on the viral contigs less than 10 kb.…”
Section: Discussionmentioning
confidence: 99%
“…Recent investigations suggest that viruses in Antarctic soils and hypoliths are highly diverse, mainly dominated by Mycobacterium phages [ 68 , 69 ]. Studies in other systems have hinted at the importance of viruses in metabolic control [ 70 , 71 ]. It is tempting to speculate that the extreme environmental conditions may promote a lysogenic rather than lytic phage lifestyle, and there is circumstantial evidence of this from Antarctic “metaviromic” studies [ 69 ].…”
Section: N-cycling Taxa In Soilsmentioning
confidence: 99%
“…The virus-host interactions in our datasets are biased towards some common viruses and host taxa, which reflects the taxonomic distribution of viruses and prokaryote in nature. For example, the three most commonly observed families (Siphoviridae, Myoviridae, and Podoviridae) account for 77% of all viruses in the VHM dataset (Additional file 1: Figure S5) and are indeed the most commonly observed phage taxa in nature [4,33]. Another limitation of the study is that the GM was inferior to WIsH in predicting virus hosts on the viral contigs less than 10kb.…”
Section: Discussionmentioning
confidence: 99%