数字农科院2.0

Diversity and function of mountain and polar supraglacial DNA viruses

文献类型： 外文期刊

作者： Liu, Yongqin;Jiao, Nianzhi;Zhong, Kevin Xu;Zang, Lin;Zhang, Rui;Xiao, Xiang;Shi, Yi;Zhang, Zhihao;Tao, Ye;Bai, Liping;Gao, Bianli;Yang, Yunlan;Huang, Xingyu;Ji, Mukan;Liu, Junzhi;Liu, Pengfei;Yao, Tandong

作者机构：

关键词： Supraglacial virus genome catalog;DNA viruses;Diversity and function;Antibiotic resistance genes;Virulence factors;Auxiliary metabolic gene

期刊名称： SCIENCE BULLETIN

ISSN： 2095-9273

年卷期： 2023 年 68 卷 20 期

页码：

收录情况： SCIE（2023版） ; ; EI（2023版） ; ; CSCD（2023-2024年度） ; ; 科技核心（2023版）

摘要： Mountain and polar glaciers cover 10% of the Earth's surface and are typically extreme environments that challenge life of all forms. Viruses are abundant and active in supraglacial ecosystems and play a crucial role in controlling the supraglacial microbial communities. However, our understanding of virus ecology on glacier surfaces and their potential impacts on downstream ecosystems remains limited. Here, we present the supraglacial virus genome (SgVG) catalog, a 15-fold expanded genomic inventory of 10,840 DNAvirus species from 38 mountain and polar glaciers, spanning habitats such as snow, ice, meltwater, and cryoconite. Supraglacial DNA-viruses were highly specific compared to viruses in other ecosystems yet exhibited low public health risks. Supraglacial viral communities were primarily constrained by habitat, with cryoconite displaying the highest viral activity levels. We observed a prevalence of lytic viruses in all habitats, especially in cryoconite, but a high level of lysogenic viruses in snow and ice. Additionally, we found that supraglacial viruses could be linked to -83% of obtained prokaryotic phyla/classes and possessed the genetic potential to promote metabolism and increase cold adaptation, cell mobility, and phenolic carbon use of hosts in hostile environmental conditions using diverse auxiliary metabolic genes. Our results provide the first systematic characterization of the diversity, function, and public health risks evaluation of mountain and polar supraglacial DNA viruses. This understanding of glacial viruses is crucial for function assessments and ecological modeling of glacier ecosystems, especially for the Tibetan Plateau's Mountain glaciers, which support -20% of the human populations on Earth. (c) 2023 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.

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