RNA virus diversity highlights the potential biosecurity threat posed by Antarctic krill

文献类型： 外文期刊

第一作者： Xu, Tingting

作者： Xu, Tingting;Zhao, Xianyong;Zhu, Jiancheng;Wang, Wei;Wang, Xinliang;Wang, Chong;Fan, Gangzhou;Zhang, Jichang;Zhao, Wenxiu;Zhang, Qingli;Xu, Tingting;Zhao, Xianyong;Zhu, Jiancheng;Wang, Wei;Wang, Xinliang;Wang, Chong;Fan, Gangzhou;Zhang, Jichang;Zhao, Wenxiu;Zhang, Qingli;Xu, Tingting;Zhao, Xianyong;Zhu, Jiancheng;Wang, Wei;Wang, Xinliang;Wang, Chong;Fan, Gangzhou;Zhang, Jichang;Zhao, Wenxiu;Zhang, Qingli;Loch, Thomas;Hao, Bin;Bondad-Reantaso, Melba G.;Alday-Sanz, Victoria

作者机构：

关键词： RNA virome; Antarctic krill Euphausia superba; Biosafety; Global aquaculture; Antarctic ecosystem

期刊名称：MARINE LIFE SCIENCE & TECHNOLOGY （ 影响因子：5.3； 五年影响因子：5.3 ）

ISSN： 2096-6490

年卷期： 2025 年 7 卷 1 期

页码：

收录情况： SCI

摘要： Antarctic krill Euphausia superba, one of the most abundant species on the planet, is a keystone species of the Southern Ocean ecosystem. In the present study, we analyzed the RNA virome of Antarctic krill via metatranscription methods. The results showed that only 0.39% (49/12, 558) of the resultant unigenes could be assigned to known viral taxa, which were most similar to 17 known viruses, including nine invertebrate viruses, two vertebrate viruses, three protozoan viruses and three mycoviruses. However, most of the detected viruses possessed low amino acid similarity with counterparts in the viral databases. Penaeus vannamei picornavirus (PvPV; Family Picornaviridae) and covert mortality nodavirus (CMNV; Family Nodaviridae) were the two most abundant viruses in the Antarctic krill RNA virome. Notably, PvPV and CMNV are known pathogens to multiple aquatic animals according to epidemiological survey and exposure experiments, whereby PvPV positive krill caused clinical symptoms and histopathological lesions to P. vannamei and similarly, CMNV infection altered the swimming and feeding behavior of parent marine medaka Oryzias melastigma and caused tissue damage and even spinal curvature of the offspring. Results herein reveal, for the first time, the high abundance and taxonomic diversity of viruses in Antarctic krill while simultaneously highlighting the risk of an important virus reservoir to global aquaculture, and the potential impact on animals in the Antarctic ecosystem.

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