Diverse circular replication-associated protein encoding viruses circulating in invertebrates within a lake ecosystem

Dayaram Anisha, Galatowitsch Mark L., Argüello-Astorga Gerardo, van Bysterveldt Katherine, Kraberger Simona, Stainton Daisy, Harding Jon S., Roumagnac Philippe, Martin Darren Patrick, Lefeuvre Pierre, Varsani Arvind. 2016. Diverse circular replication-associated protein encoding viruses circulating in invertebrates within a lake ecosystem. Infection, Genetics and Evolution, 39 : 304-316.

Quartile : Q2, Sujet : INFECTIOUS DISEASES

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Anthropologie-Ethnologie

Note générale : Jeux de données enregistrés dans GenBank : KP153359–KP153527

Résumé : Over the last five years next-generation sequencing has become a cost effective and efficient method for identifying known and unknown microorganisms. Access to this technique has dramatically changed the field of virology, enabling a wide range of environmental viral metagenome studies to be undertaken of organisms and environmental samples from polar to tropical regions. These studies have led to the discovery of hundreds of highly divergent single stranded DNA (ssDNA) virus-like sequences encoding replication-associated proteins. Yet, few studies have explored how viruses might be shared in an ecosystem through feeding relationships. Here we identify 169 circular molecules (160 CRESS DNA molecules, nine circular molecules) recovered from a New Zealand freshwater lake, that we have tentatively classified into 51 putatively novel species and five previously described species (DflaCV-3, -5, -6, -8, -10). The CRESS DNA viruses identified in this study were recovered from molluscs (Echyridella menzeisii, Musculium novaezelandiae, Potamopyrgus antipodarum and Physella acuta) and insect larvae (Procordulia grayi, Xanthocnemis zealandica, and Chironomus zealandicus) collected from Lake Sarah, as well as from the lake water and benthic sediments. Extensive diversity was observed across most CRESS DNA molecules recovered. The putative capsid protein of one viral species was found to be most similar to those of members of the Tombusviridae family, thus expanding the number of known RNA–DNA hybrid viruses in nature. We noted a strong association between the CRESS DNA viruses and circular molecules identified in the water and browser organisms (C. zealandicus, P. antipodarum and P. acuta), and between water sediments and undefended prey species (C. zealandicus). However, we were unable to find any significant correlation of viral assemblages to the potential feeding relationships of the host aquatic invertebrates.

Mots-clés Agrovoc : virologie, Invertébré, Mollusca, Insecta, virus, Réplication virale, milieu aquatique, eau douce, lac, nutrition animale, taxonomie, phylogénie, écologie microbienne, hôte

Mots-clés complémentaires : Echyridella menzeisi, Procordulia grayi, Xanthocnemis zealandica, Musculium novazelandiae, Chironomus zealandicus, Potamopyrgus antipodarum, Physella acuta

Classification Agris : L73 - Maladies des animaux
M40 - Écologie aquatique

Champ stratégique Cirad : Axe 4 (2014-2018) - Santé des animaux et des plantes

Auteurs et affiliations

• Dayaram Anisha, University of Canterbury (NZL)
• Galatowitsch Mark L., University of Canterbury (NZL)
• Argüello-Astorga Gerardo, Instituto Potosino de Investigacion Cientifica y Tecnologica (MEX)
• van Bysterveldt Katherine, University of Canterbury (NZL)
• Kraberger Simona, University of Canterbury (NZL)
• Stainton Daisy, University of Canterbury (NZL)
• Harding Jon S., University of Canterbury (NZL)
• Roumagnac Philippe, CIRAD-BIOS-UMR BGPI (ZAF) ORCID: 0000-0001-5002-6039
• Martin Darren Patrick, Montpellier SupAgro (FRA)
• Lefeuvre Pierre, CIRAD-BIOS-UMR PVBMT (REU)
• Varsani Arvind, University of Canterbury (NZL)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/579770/)

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